feat(maestro): port kill dialog, help overlay, context menu, drawer to React

Closes #250: kill confirmation/force-kill (dialogs/KillDialog), the ?
shortcuts overlay (dialogs/HelpOverlay), the general-purpose right-click
menu (common/ContextMenu, closes on scroll/resize unlike the sidebar's
own), the mobile drawer with swipe support (layout/Drawer), and the
visual-viewport hook (hooks/useViewport). Each is a standalone, tested
port of its vanilla-DOM source; wiring into the shell is a later issue.

.claude/settings.local.json

@@ -0,0 +1,18 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(git add:*)",
+      "Bash(git commit:*)",
+      "Bash(git fetch:*)",
+      "Bash(git merge:*)",
+      "Bash(npx tsc:*)",
+      "Bash(npm run build:*)",
+      "Bash(npm install:*)",
+      "Bash(./node_modules/.bin/tsc:*)",
+      "Bash(npm test:*)",
+      "Bash(cargo check:*)",
+      "Bash(cargo clippy:*)",
+      "Bash(cargo test:*)"
+    ]
+  }
+}

Cargo.lock

@@ -1467,6 +1467,7 @@ dependencies = [
  "maestro-cli",
  "maestro-daemon",
  "maestro-tui",
+ "tempfile",
  "tokio",
  "tracing-subscriber",
 ]
@@ -1477,6 +1478,7 @@ version = "0.1.0"
 dependencies = [
  "agent-client-protocol",
  "libc",
+ "serde",
  "serde_json",
  "tempfile",
  "thiserror 1.0.69",

crates/maestro-acp/Cargo.toml

@@ -5,11 +5,12 @@ edition.workspace = true
 license.workspace = true
 repository.workspace = true
 publish.workspace = true
-description = "ACP client role: one claude-code-acp child per structured session"
+description = "ACP client role: one provider adapter child per structured session"
 
 [dependencies]
 agent-client-protocol.workspace = true
 libc.workspace = true
+serde.workspace = true
 serde_json.workspace = true
 thiserror.workspace = true
 tokio.workspace = true

crates/maestro-acp/src/lib.rs

@@ -1,5 +1,5 @@
-//! ACP client role for the daemon (#134): one `claude-code-acp` child per
-//! structured session.
+//! ACP client role for the daemon: one provider adapter child per structured
+//! session.
 //!
 //! The daemon is the client; the adapter is the agent. [`spawn`] starts the
 //! adapter as a child process with stdio pipes, in the session's `cwd` with
@@ -9,10 +9,10 @@
 //!
 //! **The handshake declares almost nothing.** `initialize` reports
 //! `fs.readTextFile`, `fs.writeTextFile` and `terminal` as `false`, so the
-//! adapter uses Claude Code's own Read / Write / Bash instead of asking the
-//! daemon to act on its behalf — exactly what already happens in the
-//! terminal view. `session/request_permission` is the one client method that
-//! gets a real implementation, in #139; here it is a stub that declines.
+//! adapter uses the provider's own file and command tools instead of asking
+//! the daemon to act on its behalf — exactly what already happens in the
+//! terminal view. `session/request_permission` is the one client method with
+//! a real implementation.
 //!
 //! Every `session/update` notification the adapter sends lands on an
 //! unbounded channel the session owns ([`AcpSession::take_updates`]). Nothing
@@ -42,30 +42,62 @@ use std::sync::{Arc, Mutex};
 use std::time::Duration;
 
 use agent_client_protocol::schema::v1::{
-    CancelNotification, ClientCapabilities, ContentBlock, FileSystemCapabilities, Implementation,
-    InitializeRequest, LoadSessionRequest, NewSessionRequest, PromptRequest,
-    RequestPermissionOutcome, RequestPermissionRequest, RequestPermissionResponse, SessionId,
-    SessionNotification,
+    CancelNotification, ClientCapabilities, ConfigOptionUpdate, ContentBlock, CurrentModeUpdate,
+    FileSystemCapabilities, Implementation, InitializeRequest, PromptRequest,
+    RequestPermissionOutcome, RequestPermissionRequest, RequestPermissionResponse,
+    SessionConfigKind, SessionConfigOption, SessionConfigOptionCategory, SessionConfigOptionValue,
+    SessionConfigSelectOption, SessionId, SessionModeState, SessionNotification, SessionUpdate,
+    SetSessionConfigOptionRequest, SetSessionModeRequest,
 };
 use agent_client_protocol::schema::ProtocolVersion;
-use agent_client_protocol::{ByteStreams, Client};
+use agent_client_protocol::{ByteStreams, Client, JsonRpcRequest, JsonRpcResponse};
+use serde::{Deserialize, Serialize};
 use tokio::io::AsyncBufReadExt;
 use tokio::sync::{mpsc, oneshot, watch};
 use tokio_util::compat::{TokioAsyncReadCompatExt, TokioAsyncWriteCompatExt};
 
 pub use agent_client_protocol::schema::v1 as schema;
 
-/// The adapter binary, resolved on `PATH`.
-pub const ADAPTER_BIN: &str = "claude-code-acp";
+/// ACP adapter selected from the structured session's resolved command.
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum AcpAdapter {
+    ClaudeCode,
+    Codex,
+}
 
-/// How to install the adapter when it is missing. Named in the error so an
-/// operator staring at a failed session knows what to run.
+impl AcpAdapter {
+    pub const fn binary(self) -> &'static str {
+        match self {
+            Self::ClaudeCode => "claude-code-acp",
+            Self::Codex => "codex-acp",
+        }
+    }
+
+    pub const fn install_command(self) -> &'static str {
+        match self {
+            Self::ClaudeCode => "npm install -g --prefix ~/.local @zed-industries/claude-code-acp",
+            Self::Codex => "npm install -g --prefix ~/.local @agentclientprotocol/codex-acp",
+        }
+    }
+}
+
+impl std::fmt::Display for AcpAdapter {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.write_str(match self {
+            Self::ClaudeCode => "Claude Code",
+            Self::Codex => "Codex",
+        })
+    }
+}
+
+/// Compatibility aliases for Claude Code callers.
+pub const ADAPTER_BIN: &str = "claude-code-acp";
 pub const INSTALL_COMMAND: &str =
     "npm install -g --prefix ~/.local @zed-industries/claude-code-acp";
 
 /// How long `initialize` + `session/new` may take before the spawn is
-/// declared failed. The real adapter boots a node process and the Claude
-/// Code SDK behind it; a slow machine takes seconds, never a minute.
+/// declared failed. The real adapters boot a node process and their provider
+/// client behind it; a slow machine takes seconds, never a minute.
 pub const HANDSHAKE_TIMEOUT: Duration = Duration::from_secs(60);
 
 /// How long [`AcpSession::terminate`] waits after `session/cancel` before
@@ -78,6 +110,75 @@ pub const TERM_GRACE: Duration = Duration::from_secs(2);
 
 /// Bytes of the child's stderr kept for the failure message.
 const STDERR_TAIL_BYTES: usize = 4096;
+const LEGACY_MODEL_CONFIG_ID: &str = "__maestro_legacy_model";
+const LEGACY_MODE_CONFIG_ID: &str = "__maestro_legacy_mode";
+
+#[derive(Debug, Clone, Serialize, Deserialize, JsonRpcRequest)]
+#[request(method = "session/new", response = ExtendedNewSessionResponse)]
+#[serde(rename_all = "camelCase")]
+struct ExtendedNewSessionRequest {
+    cwd: PathBuf,
+    mcp_servers: Vec<serde_json::Value>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, JsonRpcResponse)]
+#[serde(rename_all = "camelCase")]
+struct ExtendedNewSessionResponse {
+    session_id: SessionId,
+    #[serde(default)]
+    modes: Option<SessionModeState>,
+    #[serde(default)]
+    config_options: Option<Vec<SessionConfigOption>>,
+    #[serde(default)]
+    models: Option<LegacyModelState>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, JsonRpcRequest)]
+#[request(method = "session/load", response = ExtendedLoadSessionResponse)]
+#[serde(rename_all = "camelCase")]
+struct ExtendedLoadSessionRequest {
+    session_id: SessionId,
+    cwd: PathBuf,
+    mcp_servers: Vec<serde_json::Value>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, JsonRpcResponse)]
+#[serde(rename_all = "camelCase")]
+struct ExtendedLoadSessionResponse {
+    #[serde(default)]
+    modes: Option<SessionModeState>,
+    #[serde(default)]
+    config_options: Option<Vec<SessionConfigOption>>,
+    #[serde(default)]
+    models: Option<LegacyModelState>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+struct LegacyModelState {
+    current_model_id: String,
+    available_models: Vec<LegacyModel>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+struct LegacyModel {
+    model_id: String,
+    name: String,
+    #[serde(default)]
+    description: Option<String>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, JsonRpcRequest)]
+#[request(method = "session/set_model", response = LegacySetModelResponse)]
+#[serde(rename_all = "camelCase")]
+struct LegacySetModelRequest {
+    session_id: SessionId,
+    model_id: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, JsonRpcResponse)]
+struct LegacySetModelResponse {}
 
 /// What [`spawn`] needs to start one adapter.
 #[derive(Debug, Clone)]
@@ -94,6 +195,8 @@ pub struct SpawnConfig {
     /// instead of opening a fresh one. The adapter must advertise
     /// `loadSession`; the handshake fails otherwise.
     pub load_session: Option<String>,
+    /// The provider-specific adapter to launch.
+    pub adapter: AcpAdapter,
 }
 
 impl SpawnConfig {
@@ -103,6 +206,7 @@ impl SpawnConfig {
             env,
             handshake_timeout: HANDSHAKE_TIMEOUT,
             load_session: None,
+            adapter: AcpAdapter::ClaudeCode,
         }
     }
 
@@ -111,6 +215,11 @@ impl SpawnConfig {
         self.load_session = Some(session_id.into());
         self
     }
+
+    pub fn adapter(mut self, adapter: AcpAdapter) -> Self {
+        self.adapter = adapter;
+        self
+    }
 }
 
 /// A blocked ACP permission request delivered to the daemon.
@@ -126,31 +235,39 @@ pub struct PermissionRequest {
 pub enum AcpError {
     /// The adapter is not on `PATH`. The message names the install command
     /// so the failed session is actionable rather than silently dead.
-    #[error("{ADAPTER_BIN} not found on PATH; install it with: {INSTALL_COMMAND}")]
-    AdapterMissing,
-    #[error("failed to start {ADAPTER_BIN}: {0}")]
-    Spawn(#[source] std::io::Error),
+    #[error("{adapter} ACP adapter ({bin}) not found on PATH; install it with: {install_command}", bin = adapter.binary(), install_command = adapter.install_command())]
+    AdapterMissing { adapter: AcpAdapter },
+    #[error("failed to start {adapter} ACP adapter ({bin}): {source}", bin = adapter.binary())]
+    Spawn {
+        adapter: AcpAdapter,
+        #[source]
+        source: std::io::Error,
+    },
     /// The adapter answered the handshake with an error.
     #[error("ACP handshake failed: {0}")]
     Handshake(String),
     /// The adapter went away before the handshake finished. Carries the
     /// tail of its stderr, which is where a missing Claude login shows up.
-    #[error("{ADAPTER_BIN} exited during the ACP handshake ({status}){stderr}")]
-    ExitedEarly { status: String, stderr: String },
+    #[error("{adapter} ACP adapter ({bin}) exited during the ACP handshake ({status}){stderr}", bin = adapter.binary())]
+    ExitedEarly {
+        adapter: AcpAdapter,
+        status: String,
+        stderr: String,
+    },
     #[error("ACP handshake timed out after {0:?}")]
     HandshakeTimeout(Duration),
 }
 
 /// Resolve [`ADAPTER_BIN`] against the `PATH` the child would run with: the
 /// session env's `PATH` when it sets one, the daemon's own otherwise.
-pub fn resolve_adapter(env: &HashMap<String, String>) -> Option<PathBuf> {
+pub fn resolve_adapter(adapter: AcpAdapter, env: &HashMap<String, String>) -> Option<PathBuf> {
     let path: OsString = match env.get("PATH") {
         Some(p) => OsString::from(p),
         None => std::env::var_os("PATH")?,
     };
     std::env::split_paths(&path)
         .filter(|dir| !dir.as_os_str().is_empty())
-        .map(|dir| dir.join(ADAPTER_BIN))
+        .map(|dir| dir.join(adapter.binary()))
         .find(|candidate| is_executable(candidate))
 }
 
@@ -168,9 +285,20 @@ enum Command {
         turn: u64,
         done: oneshot::Sender<Result<(), String>>,
     },
+    SetConfig {
+        config_id: String,
+        value: SessionConfigOptionValue,
+        done: oneshot::Sender<Result<(), String>>,
+    },
     Close,
 }
 
+struct ConnectionConfig {
+    cwd: PathBuf,
+    load_session: Option<String>,
+    adapter: AcpAdapter,
+}
+
 enum ChildCommand {
     Signal(libc::c_int),
     Reap(oneshot::Sender<bool>),
@@ -301,6 +429,23 @@ impl AcpSession {
         Ok(done_rx)
     }
 
+    /// Change one option advertised by the ACP agent.
+    pub fn set_config(
+        &self,
+        config_id: String,
+        value: SessionConfigOptionValue,
+    ) -> Result<oneshot::Receiver<Result<(), String>>, String> {
+        let (done_tx, done_rx) = oneshot::channel();
+        self.commands
+            .send(Command::SetConfig {
+                config_id,
+                value,
+                done: done_tx,
+            })
+            .map_err(|_| "ACP connection is closed".to_string())?;
+        Ok(done_rx)
+    }
+
     /// End the child: `session/cancel`, wait `cancel_grace`, `SIGTERM`, wait
     /// `term_grace`, `SIGKILL`. Returns once the child has been reaped.
     pub async fn terminate(&self, cancel_grace: Duration, term_grace: Duration) {
@@ -341,7 +486,9 @@ impl Drop for AcpSession {
 /// Fails without a running child: on any error the process is already
 /// signalled, so a failed session never leaves a stray adapter behind.
 pub async fn spawn(config: SpawnConfig) -> Result<AcpSession, AcpError> {
-    let adapter = resolve_adapter(&config.env).ok_or(AcpError::AdapterMissing)?;
+    let provider = config.adapter;
+    let adapter = resolve_adapter(provider, &config.env)
+        .ok_or(AcpError::AdapterMissing { adapter: provider })?;
 
     let mut cmd = tokio::process::Command::new(&adapter);
     cmd.current_dir(&config.cwd)
@@ -369,18 +516,27 @@ pub async fn spawn(config: SpawnConfig) -> Result<AcpSession, AcpError> {
             });
         }
     }
-    let mut child = cmd.spawn().map_err(AcpError::Spawn)?;
+    let mut child = cmd.spawn().map_err(|source| AcpError::Spawn {
+        adapter: provider,
+        source,
+    })?;
     let pid = child.id().expect("child pid is known before wait");
     let stdin = child.stdin.take().expect("piped stdin");
     let stdout = child.stdout.take().expect("piped stdout");
     let stderr = child.stderr.take().expect("piped stderr");
 
     let stderr_tail = Arc::new(Mutex::new(VecDeque::<u8>::new()));
-    tokio::spawn(drain_stderr(stderr, pid, stderr_tail.clone()));
+    tokio::spawn(drain_stderr(stderr, pid, stderr_tail.clone(), provider));
 
     let (exit_tx, exit_rx) = watch::channel(None);
     let (child_commands_tx, child_commands_rx) = mpsc::unbounded_channel();
-    tokio::spawn(supervise_child(child, pid, child_commands_rx, exit_tx));
+    tokio::spawn(supervise_child(
+        child,
+        pid,
+        child_commands_rx,
+        exit_tx,
+        provider,
+    ));
 
     let (updates_tx, updates_rx) = mpsc::unbounded_channel();
     let (permission_tx, permission_rx) = mpsc::unbounded_channel();
@@ -389,8 +545,11 @@ pub async fn spawn(config: SpawnConfig) -> Result<AcpSession, AcpError> {
     let transport = ByteStreams::new(stdin.compat_write(), stdout.compat());
     tokio::spawn(run_connection(
         transport,
-        config.cwd.clone(),
-        config.load_session.clone(),
+        ConnectionConfig {
+            cwd: config.cwd.clone(),
+            load_session: config.load_session.clone(),
+            adapter: provider,
+        },
         updates_tx,
         permission_tx,
         commands_rx,
@@ -423,6 +582,7 @@ pub async fn spawn(config: SpawnConfig) -> Result<AcpSession, AcpError> {
                     .to_string()
             };
             AcpError::ExitedEarly {
+                adapter: provider,
                 status: status.map_or_else(|| "unknown status".into(), |s| s.to_string()),
                 stderr: if stderr.is_empty() {
                     String::new()
@@ -457,12 +617,13 @@ async fn supervise_child(
     pid: u32,
     mut commands: mpsc::UnboundedReceiver<ChildCommand>,
     exit_tx: watch::Sender<Option<ExitStatus>>,
+    adapter: AcpAdapter,
 ) {
     loop {
         tokio::select! {
             status = child.wait() => {
                 let status = status.ok();
-                tracing::debug!(pid, ?status, "{ADAPTER_BIN} exited");
+                tracing::debug!(pid, ?status, provider = %adapter, "ACP adapter exited");
                 let _ = exit_tx.send(status);
                 return;
             }
@@ -476,7 +637,7 @@ async fn supervise_child(
                 Some(ChildCommand::Reap(done)) => match child.try_wait() {
                     Ok(Some(status)) => {
                         let _ = done.send(true);
-                        tracing::debug!(pid, ?status, "{ADAPTER_BIN} exited");
+                        tracing::debug!(pid, ?status, provider = %adapter, "ACP adapter exited");
                         let _ = exit_tx.send(Some(status));
                         return;
                     }
@@ -484,7 +645,7 @@ async fn supervise_child(
                         let _ = done.send(false);
                     }
                     Err(error) => {
-                        tracing::warn!(pid, %error, "could not reap {ADAPTER_BIN}");
+                        tracing::warn!(pid, %error, provider = %adapter, "could not reap ACP adapter");
                         let _ = done.send(false);
                     }
                 },
@@ -494,7 +655,7 @@ async fn supervise_child(
                     // a reused PID.
                     unsafe { libc::kill(pid as libc::pid_t, libc::SIGTERM) };
                     let status = child.wait().await.ok();
-                    tracing::debug!(pid, ?status, "{ADAPTER_BIN} exited");
+                    tracing::debug!(pid, ?status, provider = %adapter, "ACP adapter exited");
                     let _ = exit_tx.send(status);
                     return;
                 }
@@ -513,10 +674,104 @@ fn client_capabilities() -> ClientCapabilities {
         .terminal(false)
 }
 
+fn advertised_config_options(
+    mut options: Vec<SessionConfigOption>,
+    modes: Option<&SessionModeState>,
+    models: Option<&LegacyModelState>,
+) -> Vec<SessionConfigOption> {
+    let has_model = options
+        .iter()
+        .any(|option| matches!(option.category, Some(SessionConfigOptionCategory::Model)));
+    let has_mode = options
+        .iter()
+        .any(|option| matches!(option.category, Some(SessionConfigOptionCategory::Mode)));
+    if let Some(models) = models.filter(|_| !has_model) {
+        let mut choices = models
+            .available_models
+            .iter()
+            .map(|model| {
+                let mut option =
+                    SessionConfigSelectOption::new(model.model_id.clone(), &model.name);
+                if model.model_id == "default" {
+                    option.name = "Opus (default)".into();
+                }
+                option.description.clone_from(&model.description);
+                option
+            })
+            .collect::<Vec<_>>();
+        if !models
+            .available_models
+            .iter()
+            .any(|model| model.model_id == "fable")
+        {
+            choices.push(SessionConfigSelectOption::new("fable", "Fable"));
+        }
+        options.push(
+            SessionConfigOption::select(
+                LEGACY_MODEL_CONFIG_ID,
+                "Model",
+                models.current_model_id.clone(),
+                choices,
+            )
+            .category(SessionConfigOptionCategory::Model),
+        );
+    }
+    if let Some(modes) = modes.filter(|_| !has_mode) {
+        let choices = modes
+            .available_modes
+            .iter()
+            .map(|mode| {
+                let mut option = SessionConfigSelectOption::new(mode.id.0.clone(), &mode.name);
+                option.description.clone_from(&mode.description);
+                option
+            })
+            .collect::<Vec<_>>();
+        options.push(
+            SessionConfigOption::select(
+                LEGACY_MODE_CONFIG_ID,
+                "Mode",
+                modes.current_mode_id.0.clone(),
+                choices,
+            )
+            .category(SessionConfigOptionCategory::Mode),
+        );
+    }
+    options
+}
+
+fn replace_config_value(
+    options: &Arc<Mutex<Vec<SessionConfigOption>>>,
+    config_id: &str,
+    value: &SessionConfigOptionValue,
+) -> Vec<SessionConfigOption> {
+    let mut options = options.lock().expect("config options");
+    if let Some(option) = options
+        .iter_mut()
+        .find(|option| option.id.0.as_ref() == config_id)
+    {
+        match (&mut option.kind, value) {
+            (SessionConfigKind::Select(select), SessionConfigOptionValue::ValueId { value }) => {
+                select.current_value = value.clone();
+            }
+            (SessionConfigKind::Boolean(boolean), SessionConfigOptionValue::Boolean { value }) => {
+                boolean.current_value = *value;
+            }
+            _ => {}
+        }
+    }
+    options.clone()
+}
+
+fn config_notification(session_id: &str, options: Vec<SessionConfigOption>) -> SessionNotification {
+    SessionNotification::new(
+        SessionId::new(session_id),
+        SessionUpdate::ConfigOptionUpdate(ConfigOptionUpdate::new(options)),
+    )
+}
+
 async fn run_connection<T>(
     transport: T,
-    cwd: PathBuf,
-    load_session: Option<String>,
+    config: ConnectionConfig,
     updates_tx: mpsc::UnboundedSender<SessionNotification>,
     permission_requests: mpsc::UnboundedSender<PermissionRequest>,
     mut commands_rx: mpsc::UnboundedReceiver<Command>,
@@ -534,6 +789,7 @@ async fn run_connection<T>(
     // until a cancelled prompt settles, so this active turn is unambiguous.
     let permission_turn = Arc::new(Mutex::new(PermissionTurnState::default()));
     let permission_turn_seen = permission_turn.clone();
+    let received_updates = updates_tx.clone();
     let result = Client
         .builder()
         .name("maestro")
@@ -544,7 +800,7 @@ async fn run_connection<T>(
                     return Ok(());
                 }
                 // A dropped receiver only means nobody wants updates any more.
-                let _ = updates_tx.send(notification);
+                let _ = received_updates.send(notification);
                 Ok(())
             },
             agent_client_protocol::on_receive_notification!(),
@@ -589,11 +845,13 @@ async fn run_connection<T>(
                     return Ok(());
                 }
             };
-            let session_id = match load_session {
+            let (session_id, modes, initial_options, models) = match config.load_session {
                 Some(existing) => {
                     if !initialized.agent_capabilities.load_session {
                         let _ = ready_tx.send(Err(ReadyError::Handshake(format!(
-                            "{ADAPTER_BIN} does not advertise loadSession; cannot resume session {existing}"
+                            "{} ACP adapter ({}) does not advertise loadSession; cannot resume session {existing}",
+                            config.adapter,
+                            config.adapter.binary()
                         ))));
                         return Ok(());
                     }
@@ -601,7 +859,11 @@ async fn run_connection<T>(
                     let (loaded_tx, loaded_rx) = oneshot::channel();
                     let replaying_done = replaying.clone();
                     if let Err(e) = cx
-                        .send_request(LoadSessionRequest::new(existing.clone(), cwd))
+                        .send_request(ExtendedLoadSessionRequest {
+                            session_id: SessionId::new(existing.as_str()),
+                            cwd: config.cwd,
+                            mcp_servers: vec![],
+                        })
                         .on_receiving_result(move |result| {
                             replaying_done.store(false, Ordering::SeqCst);
                             async move {
@@ -613,8 +875,8 @@ async fn run_connection<T>(
                         let _ = ready_tx.send(Err(ready_error(e)));
                         return Ok(());
                     }
-                    match loaded_rx.await {
-                        Ok(Ok(_)) => {}
+                    let loaded = match loaded_rx.await {
+                        Ok(Ok(loaded)) => loaded,
                         Ok(Err(e)) => {
                             let _ = ready_tx.send(Err(ready_error(e)));
                             return Ok(());
@@ -625,21 +887,48 @@ async fn run_connection<T>(
                             )));
                             return Ok(());
                         }
-                    }
-                    existing
+                    };
+                    (existing, loaded.modes, loaded.config_options.unwrap_or_default(), loaded.models)
                 }
                 None => match cx
-                    .send_request(NewSessionRequest::new(cwd))
+                    .send_request(ExtendedNewSessionRequest {
+                        cwd: config.cwd,
+                        mcp_servers: vec![],
+                    })
                     .block_task()
                     .await
                 {
-                    Ok(created) => created.session_id.0.to_string(),
+                    Ok(created) => (
+                        created.session_id.0.to_string(),
+                        created.modes,
+                        created.config_options.unwrap_or_default(),
+                        created.models,
+                    ),
                     Err(e) => {
                         let _ = ready_tx.send(Err(ready_error(e)));
                         return Ok(());
                     }
                 },
             };
+            let config_options = Arc::new(Mutex::new(advertised_config_options(
+                initial_options,
+                modes.as_ref(),
+                models.as_ref(),
+            )));
+            if let Some(modes) = &modes {
+                let _ = updates_tx.send(SessionNotification::new(
+                    SessionId::new(session_id.as_str()),
+                    SessionUpdate::CurrentModeUpdate(CurrentModeUpdate::new(
+                        modes.current_mode_id.clone(),
+                    )),
+                ));
+            }
+            if !config_options.lock().expect("config options").is_empty() {
+                let _ = updates_tx.send(config_notification(
+                    &session_id,
+                    config_options.lock().expect("config options").clone(),
+                ));
+            }
             let _ = ready_tx.send(Ok(session_id.clone()));
 
             loop {
@@ -689,6 +978,83 @@ async fn run_connection<T>(
                                 }
                             }
                         }
+                        Some(Command::SetConfig { config_id, value, done }) => {
+                            let done = Arc::new(Mutex::new(Some(done)));
+                            let callback_done = done.clone();
+                            let callback_options = config_options.clone();
+                            let callback_updates = updates_tx.clone();
+                            let callback_session = session_id.clone();
+                            let callback_config_id = config_id.clone();
+                            let callback_value = value.clone();
+                            let sent = if config_id == LEGACY_MODEL_CONFIG_ID {
+                                let Some(model_id) = value.as_value_id() else {
+                                    let _ = done.lock().expect("config sender").take()
+                                        .map(|done| done.send(Err("model must be a string value".into())));
+                                    continue;
+                                };
+                                cx.send_request(LegacySetModelRequest {
+                                    session_id: SessionId::new(session_id.as_str()),
+                                    model_id: model_id.0.to_string(),
+                                }).on_receiving_result(move |result| async move {
+                                    if result.is_ok() {
+                                        let options = replace_config_value(&callback_options, &callback_config_id, &callback_value);
+                                        let _ = callback_updates.send(config_notification(&callback_session, options));
+                                    }
+                                    if let Some(done) = callback_done.lock().expect("config sender").take() {
+                                        let _ = done.send(result.map(|_| ()).map_err(|error| error.to_string()));
+                                    }
+                                    Ok(())
+                                })
+                            } else if config_id == LEGACY_MODE_CONFIG_ID {
+                                let Some(mode_id) = value.as_value_id() else {
+                                    let _ = done.lock().expect("config sender").take()
+                                        .map(|done| done.send(Err("mode must be a string value".into())));
+                                    continue;
+                                };
+                                cx.send_request(SetSessionModeRequest::new(
+                                    SessionId::new(session_id.as_str()),
+                                    mode_id.0.to_string(),
+                                )).on_receiving_result(move |result| async move {
+                                    if result.is_ok() {
+                                        let options = replace_config_value(&callback_options, &callback_config_id, &callback_value);
+                                        let _ = callback_updates.send(config_notification(&callback_session, options));
+                                        let _ = callback_updates.send(SessionNotification::new(
+                                            SessionId::new(callback_session.as_str()),
+                                            SessionUpdate::CurrentModeUpdate(CurrentModeUpdate::new(
+                                                callback_value.as_value_id().expect("checked mode value").0.clone(),
+                                            )),
+                                        ));
+                                    }
+                                    if let Some(done) = callback_done.lock().expect("config sender").take() {
+                                        let _ = done.send(result.map(|_| ()).map_err(|error| error.to_string()));
+                                    }
+                                    Ok(())
+                                })
+                            } else {
+                                cx.send_request(SetSessionConfigOptionRequest::new(
+                                    SessionId::new(session_id.as_str()),
+                                    config_id,
+                                    value,
+                                ))
+                                    .on_receiving_result(move |result| async move {
+                                        if let Ok(response) = &result {
+                                            let mut current = callback_options.lock().expect("config options");
+                                            current.retain(|option| option.id.0.as_ref().starts_with("__maestro_legacy_"));
+                                            current.extend(response.config_options.clone());
+                                            let _ = callback_updates.send(config_notification(&callback_session, current.clone()));
+                                        }
+                                        if let Some(done) = callback_done.lock().expect("config sender").take() {
+                                            let _ = done.send(result.map(|_| ()).map_err(|error| error.to_string()));
+                                        }
+                                        Ok(())
+                                    })
+                            };
+                            if let Err(error) = sent {
+                                if let Some(done) = done.lock().expect("config sender").take() {
+                                    let _ = done.send(Err(error.to_string()));
+                                }
+                            }
+                        }
                         Some(Command::Close) | None => break,
                     },
                     _ = cx.incoming_closed() => break,
@@ -706,10 +1072,11 @@ async fn drain_stderr(
     stderr: tokio::process::ChildStderr,
     pid: u32,
     tail: Arc<Mutex<VecDeque<u8>>>,
+    adapter: AcpAdapter,
 ) {
     let mut lines = tokio::io::BufReader::new(stderr).lines();
     while let Ok(Some(line)) = lines.next_line().await {
-        tracing::debug!(pid, "{ADAPTER_BIN}: {line}");
+        tracing::debug!(pid, provider = %adapter, "ACP adapter: {line}");
         let mut tail = tail.lock().expect("stderr tail");
         tail.extend(line.as_bytes());
         tail.push_back(b'\n');

crates/maestro-acp/tests/fake_acp_agent.py

@@ -19,6 +19,8 @@ Environment knobs, all optional:
   FAKE_ACP_INIT_FAIL=1    answer `initialize` with a JSON-RPC error
   FAKE_ACP_DELAY_SESSION_NEW_MS=n  wait n milliseconds before answering
                              `session/new`
+  FAKE_ACP_SESSION_NEW_GATE=path  wait for `path` to exist before answering
+                             `session/new`
   FAKE_ACP_EXIT_AFTER_NEW=1  exit 0 right after answering `session/new`
   FAKE_ACP_EXIT_ON_CANCEL=1  exit 0 on `session/cancel` (default: keep running
                              so the SIGTERM path is exercised)
@@ -34,6 +36,7 @@ Environment knobs, all optional:
   FAKE_ACP_PROMPT_FAIL=1  answer every `session/prompt` with a JSON-RPC error
   FAKE_ACP_PROMPT_FAIL_ONCE=1  answer only the first `session/prompt` with a
                              JSON-RPC error
+  FAKE_ACP_SETTINGS=1      advertise legacy model/mode and modern effort options
   FAKE_ACP_PERMISSION_AFTER_CANCEL=1  defer the first prompt's permission
                              callback until a later prompt
 
@@ -76,6 +79,41 @@ prompt_failures = 0
 pending_prompt_id = None
 pending_permission_id = None
 delayed_permission = False
+current_model = "opus"
+current_mode = "default"
+current_effort = "high"
+
+
+def settings_response(include_session=False):
+    result = {}
+    if include_session:
+        result["sessionId"] = session_id
+    if os.environ.get("FAKE_ACP_SETTINGS") == "1":
+        result.update({
+            "models": {
+                "currentModelId": current_model,
+                "availableModels": [
+                    {"modelId": "opus", "name": "Opus"},
+                    {"modelId": "sonnet", "name": "Sonnet"},
+                ],
+            },
+            "modes": {
+                "currentModeId": current_mode,
+                "availableModes": [
+                    {"id": "default", "name": "Default"},
+                    {"id": "plan", "name": "Plan"},
+                ],
+            },
+            "configOptions": [{
+                "id": "effort", "name": "Effort", "category": "thought_level",
+                "type": "select", "currentValue": current_effort,
+                "options": [
+                    {"value": "low", "name": "Low"},
+                    {"value": "high", "name": "High"},
+                ],
+            }],
+        })
+    return result
 
 
 def chunk(text):
@@ -133,8 +171,11 @@ for raw in sys.stdin:
             "authMethods": [],
         }})
     elif method == "session/new":
+        gate = os.environ.get("FAKE_ACP_SESSION_NEW_GATE")
+        while gate and not os.path.exists(gate):
+            time.sleep(0.01)
         time.sleep(int(os.environ.get("FAKE_ACP_DELAY_SESSION_NEW_MS", "0")) / 1000)
-        send({"jsonrpc": "2.0", "id": rid, "result": {"sessionId": session_id}})
+        send({"jsonrpc": "2.0", "id": rid, "result": settings_response(True)})
         send(chunk("hello from fake"))
         if os.environ.get("FAKE_ACP_EXIT_AFTER_NEW") == "1":
             sys.exit(0)
@@ -147,8 +188,18 @@ for raw in sys.stdin:
             continue
         for i in range(int(os.environ.get("FAKE_ACP_LOAD_REPLAY", "0"))):
             send(chunk(f"replayed {i + 1}"))
-        send({"jsonrpc": "2.0", "id": rid, "result": {}})
+        send({"jsonrpc": "2.0", "id": rid, "result": settings_response()})
         send(chunk("hello after load"))
+    elif method == "session/set_model":
+        current_model = params.get("modelId")
+        send({"jsonrpc": "2.0", "id": rid, "result": {}})
+    elif method == "session/set_mode":
+        current_mode = params.get("modeId")
+        send({"jsonrpc": "2.0", "id": rid, "result": {}})
+    elif method == "session/set_config_option":
+        current_effort = params.get("value")
+        send({"jsonrpc": "2.0", "id": rid, "result": {
+            "configOptions": settings_response()["configOptions"]}})
     elif method == "session/cancel":
         if os.environ.get("FAKE_ACP_EMIT_ON_CANCEL") == "1":
             send(chunk("final on cancel"))

crates/maestro-acp/tests/spawn.rs

@@ -1,12 +1,12 @@
 //! `maestro-acp` against the fake adapter in `tests/fake_acp_agent.py`, plus
-//! one ignored test against the real `claude-code-acp`.
+//! ignored smoke tests against each maintained adapter.
 
 use std::collections::HashMap;
 use std::path::{Path, PathBuf};
 use std::time::{Duration, Instant};
 
 use maestro_acp::schema::{ContentBlock, SessionUpdate};
-use maestro_acp::{AcpError, SpawnConfig, ADAPTER_BIN, INSTALL_COMMAND};
+use maestro_acp::{AcpAdapter, AcpError, SpawnConfig, ADAPTER_BIN, INSTALL_COMMAND};
 use tempfile::TempDir;
 
 fn fake_agent() -> PathBuf {
@@ -25,6 +25,7 @@ impl Fake {
         let bin = dir.path().join("bin");
         std::fs::create_dir_all(&bin).unwrap();
         std::fs::copy(fake_agent(), bin.join(ADAPTER_BIN)).unwrap();
+        std::fs::copy(fake_agent(), bin.join(AcpAdapter::Codex.binary())).unwrap();
         Self { dir }
     }
 
@@ -146,12 +147,38 @@ async fn missing_adapter_names_the_install_command() {
     let err = maestro_acp::spawn(SpawnConfig::new(cwd.path(), env))
         .await
         .expect_err("no adapter on PATH");
-    assert!(matches!(err, AcpError::AdapterMissing));
+    assert!(matches!(
+        err,
+        AcpError::AdapterMissing {
+            adapter: AcpAdapter::ClaudeCode
+        }
+    ));
     let msg = err.to_string();
     assert!(msg.contains(ADAPTER_BIN), "{msg}");
     assert!(msg.contains(INSTALL_COMMAND), "{msg}");
 }
 
+#[test]
+fn codex_adapter_has_its_own_binary_and_install_guidance() {
+    assert_eq!(AcpAdapter::Codex.binary(), "codex-acp");
+    assert!(AcpAdapter::Codex
+        .install_command()
+        .contains("@agentclientprotocol/codex-acp"));
+}
+
+#[tokio::test]
+async fn spawn_selects_the_codex_adapter() {
+    let fake = Fake::new();
+    let cwd = TempDir::new().unwrap();
+    let session = maestro_acp::spawn(fake.config(cwd.path()).adapter(AcpAdapter::Codex))
+        .await
+        .expect("spawn Codex adapter");
+    assert!(fake.log().contains("recv session/new"));
+    session
+        .terminate(Duration::from_millis(100), Duration::from_secs(2))
+        .await;
+}
+
 #[tokio::test]
 async fn session_updates_reach_the_taken_receiver() {
     let fake = Fake::new();
@@ -180,11 +207,68 @@ async fn session_updates_reach_the_taken_receiver() {
         .await;
 }
 
+#[tokio::test]
+async fn advertised_settings_are_normalized_and_mutable() {
+    let fake = Fake::new();
+    let cwd = TempDir::new().unwrap();
+    let mut config = fake.config(cwd.path());
+    config.env.insert("FAKE_ACP_SETTINGS".into(), "1".into());
+    let session = maestro_acp::spawn(config).await.expect("spawn");
+    let mut updates = session.take_updates().expect("updates");
+
+    let initial = loop {
+        let update = tokio::time::timeout(Duration::from_secs(5), updates.recv())
+            .await
+            .expect("settings update")
+            .expect("channel open");
+        if let SessionUpdate::ConfigOptionUpdate(options) = update.update {
+            break options.config_options;
+        }
+    };
+    assert_eq!(initial.len(), 3);
+    assert!(initial
+        .iter()
+        .any(|option| option.id.0.as_ref() == "effort"));
+    assert!(initial
+        .iter()
+        .any(|option| option.id.0.as_ref() == "__maestro_legacy_model"));
+    assert!(initial
+        .iter()
+        .any(|option| option.id.0.as_ref() == "__maestro_legacy_mode"));
+    let model = initial
+        .iter()
+        .find(|option| option.id.0.as_ref() == "__maestro_legacy_model")
+        .expect("legacy model option");
+    let model = serde_json::to_value(model).unwrap();
+    assert_eq!(model["options"][0]["name"], "Opus");
+    assert!(model["options"]
+        .as_array()
+        .unwrap()
+        .iter()
+        .any(|option| option["value"] == "fable"));
+
+    let changed = session
+        .set_config(
+            "__maestro_legacy_model".into(),
+            maestro_acp::schema::SessionConfigOptionValue::value_id("sonnet"),
+        )
+        .expect("queue model change");
+    changed
+        .await
+        .expect("response delivered")
+        .expect("model changed");
+    fake.wait_for_log("recv session/set_model").await;
+
+    session
+        .terminate(Duration::from_millis(100), Duration::from_secs(2))
+        .await;
+}
+
 #[tokio::test]
 async fn terminate_sends_cancel_then_sigterm() {
     let fake = Fake::new();
     let cwd = TempDir::new().unwrap();
-    let session = maestro_acp::spawn(fake.config(cwd.path()))
+    let session = maestro_acp::spawn(fake.config(cwd.path()).adapter(AcpAdapter::Codex))
         .await
         .expect("spawn");
     let pid = session.pid();
@@ -225,7 +309,7 @@ async fn terminate_is_satisfied_by_an_exit_on_cancel() {
 async fn handshake_error_fails_the_spawn_and_reaps_the_child() {
     let fake = Fake::new();
     let cwd = TempDir::new().unwrap();
-    let mut config = fake.config(cwd.path());
+    let mut config = fake.config(cwd.path()).adapter(AcpAdapter::Codex);
     config.env.insert("FAKE_ACP_INIT_FAIL".into(), "1".into());
 
     let err = maestro_acp::spawn(config).await.expect_err("init fails");
@@ -284,7 +368,7 @@ async fn child_exit_before_handshake_reports_exited_early() {
 
     let err = maestro_acp::spawn(config).await.expect_err("child died");
     match &err {
-        AcpError::ExitedEarly { status, stderr } => {
+        AcpError::ExitedEarly { status, stderr, .. } => {
             assert!(status.contains('3'), "{status}");
             assert!(stderr.contains("not logged in"), "{stderr}");
         }
@@ -320,7 +404,10 @@ fn chunk_text(n: &maestro_acp::schema::SessionNotification) -> String {
 async fn load_session_resumes_the_stored_id_and_drops_the_replay() {
     let fake = Fake::new();
     let cwd = TempDir::new().unwrap();
-    let mut config = fake.config(cwd.path()).load_session("fake-old");
+    let mut config = fake
+        .config(cwd.path())
+        .adapter(AcpAdapter::Codex)
+        .load_session("fake-old");
     config.env.insert("FAKE_ACP_LOAD_REPLAY".into(), "3".into());
 
     let session = maestro_acp::spawn(config).await.expect("spawn");
@@ -353,7 +440,10 @@ async fn load_session_resumes_the_stored_id_and_drops_the_replay() {
 async fn load_session_requires_the_load_capability() {
     let fake = Fake::new();
     let cwd = TempDir::new().unwrap();
-    let mut config = fake.config(cwd.path()).load_session("fake-old");
+    let mut config = fake
+        .config(cwd.path())
+        .adapter(AcpAdapter::Codex)
+        .load_session("fake-old");
     config.env.insert("FAKE_ACP_NO_LOAD".into(), "1".into());
 
     let err = maestro_acp::spawn(config)
@@ -368,7 +458,10 @@ async fn load_session_requires_the_load_capability() {
 async fn load_session_error_fails_the_spawn() {
     let fake = Fake::new();
     let cwd = TempDir::new().unwrap();
-    let mut config = fake.config(cwd.path()).load_session("fake-old");
+    let mut config = fake
+        .config(cwd.path())
+        .adapter(AcpAdapter::Codex)
+        .load_session("fake-old");
     config.env.insert("FAKE_ACP_LOAD_FAIL".into(), "1".into());
 
     let err = maestro_acp::spawn(config).await.expect_err("load fails");
@@ -392,3 +485,21 @@ async fn real_adapter_handshake() {
         .await;
     assert!(session.has_exited());
 }
+
+/// End to end against the maintained Codex adapter. It needs a locally
+/// authenticated Codex CLI, so CI runs it only when explicitly requested.
+#[tokio::test]
+#[ignore]
+async fn real_codex_adapter_handshake() {
+    let cwd = TempDir::new().unwrap();
+    let session =
+        maestro_acp::spawn(SpawnConfig::new(cwd.path(), HashMap::new()).adapter(AcpAdapter::Codex))
+            .await
+            .expect("real codex-acp handshake");
+    assert!(!session.session_id().is_empty());
+    assert!(pid_alive(session.pid()));
+    session
+        .terminate(maestro_acp::CANCEL_GRACE, maestro_acp::TERM_GRACE)
+        .await;
+    assert!(session.has_exited());
+}

crates/maestro-cli/src/attach.rs

@@ -19,6 +19,12 @@ use tokio_tungstenite::tungstenite::Message;
 pub enum AttachError {
     #[error("ws: {0}")]
     WebSocket(#[from] tokio_tungstenite::tungstenite::Error),
+    #[error("daemon returned {status} ({code}): {message}")]
+    Rejected {
+        status: String,
+        code: String,
+        message: String,
+    },
     #[error("io: {0}")]
     Io(#[from] io::Error),
     #[error("termios: {0}")]
@@ -32,6 +38,21 @@ pub enum AttachError {
 }
 
 impl AttachError {
+    fn from_websocket(error: tokio_tungstenite::tungstenite::Error) -> Self {
+        if let tokio_tungstenite::tungstenite::Error::Http(response) = &error {
+            if let Some(body) = response.body().as_deref() {
+                if let Ok(error_body) = serde_json::from_slice::<maestro_protocol::ApiError>(body) {
+                    return Self::Rejected {
+                        status: response.status().to_string(),
+                        code: error_body.error.code,
+                        message: error_body.error.message,
+                    };
+                }
+            }
+        }
+        Self::WebSocket(error)
+    }
+
     /// True when the failure was an inability to reach the WS endpoint at the
     /// transport level (connection refused), as opposed to an HTTP-level
     /// rejection from a daemon that did answer.
@@ -111,7 +132,9 @@ fn current_winsize() -> Option<(u16, u16)> {
 /// byte that exits cleanly without killing the session.
 #[allow(clippy::result_large_err)]
 pub async fn run_attach_url(url: &str, detach_byte: u8) -> Result<(), AttachError> {
-    let (ws, _resp) = tokio_tungstenite::connect_async(url).await?;
+    let (ws, _resp) = tokio_tungstenite::connect_async(url)
+        .await
+        .map_err(AttachError::from_websocket)?;
     let (mut sink, mut stream) = ws.split();
 
     let raw = RawTty::enable()?;
@@ -233,4 +256,25 @@ mod tests {
             Err(AttachError::InvalidDetachKey(_))
         ));
     }
+
+    #[test]
+    fn attach_surfaces_structured_handshake_errors() {
+        let body = serde_json::to_vec(&maestro_protocol::ApiError::new(
+            "not_terminal",
+            "session is not a terminal session",
+        ))
+        .unwrap();
+        let response = tokio_tungstenite::tungstenite::http::Response::builder()
+            .status(409)
+            .body(Some(body))
+            .unwrap();
+
+        let error =
+            AttachError::from_websocket(tokio_tungstenite::tungstenite::Error::Http(response));
+
+        assert_eq!(
+            error.to_string(),
+            "daemon returned 409 Conflict (not_terminal): session is not a terminal session"
+        );
+    }
 }

crates/maestro-cli/src/cli.rs

@@ -41,8 +41,8 @@ pub enum Command {
     Attach(AttachArgs),
     /// Kill a session by ID.
     Kill(KillArgs),
-    /// Type text into a running session, as if it had been typed on an
-    /// attached terminal.
+    /// Send text to a running session. Terminal sessions receive raw
+    /// keystrokes; structured sessions receive an ACP prompt.
     Send(SendArgs),
     /// Install or update the agent activity hook (#106).
     Hooks(HooksArgs),
@@ -92,6 +92,14 @@ pub struct SpawnArgs {
     /// there.
     #[arg(long)]
     pub existing_branch: bool,
+    /// Run a Claude Code or Codex session in a plain terminal instead of the
+    /// structured (ACP) view it otherwise gets by default.
+    #[arg(long, conflicts_with = "structured")]
+    pub terminal: bool,
+    /// Ask for the structured (ACP) view explicitly. Only Claude Code and
+    /// Codex commands have an adapter; the daemon refuses anything else.
+    #[arg(long)]
+    pub structured: bool,
     /// After spawning, attach immediately.
     #[arg(long, short = 'a')]
     pub attach: bool,

crates/maestro-cli/src/sessions.rs

@@ -3,10 +3,10 @@
 use std::collections::HashMap;
 use std::io::Write;
 
-use maestro_protocol::display::abbreviate_dir;
+use maestro_protocol::display::{abbreviate_dir, supports_structured_view};
 use maestro_protocol::{
     ActivityState, ClientError, CreateSessionRequest, DaemonClient, DaemonInfo, SendInputRequest,
-    Session, SessionStatus, WorktreeSpec,
+    Session, SessionStatus, SessionView, WorktreeSpec,
 };
 use serde_json::Value;
 
@@ -51,16 +51,33 @@ pub async fn run_spawn(client: &DaemonClient, args: SpawnArgs) -> Result<Session
     };
 
     let body = CreateSessionRequest {
-        view: Default::default(),
+        view: spawn_view(&args),
         cwd: args.cwd.clone(),
         command: args.command.clone(),
         env,
         metadata,
         worktree,
+        auto_approve: false,
     };
     client.create_session(&body).await
 }
 
+/// The view a `maestro spawn` asks for: structured whenever the command
+/// resolves to an agent with an ACP adapter, since that is the richer session
+/// and the one both other clients now default to. `--terminal` opts out;
+/// `--structured` forces the request through even for a command this side
+/// does not recognise, leaving the refusal to the daemon.
+fn spawn_view(args: &SpawnArgs) -> SessionView {
+    if args.terminal {
+        return SessionView::Terminal;
+    }
+    if args.structured || supports_structured_view(&args.command) {
+        SessionView::Structured
+    } else {
+        SessionView::Terminal
+    }
+}
+
 /// `maestro kill`. A forced kill (#81) retains the guarded worktree instead
 /// of removing it; the outcome names what was kept so dispatch can say where
 /// the work went.
@@ -113,9 +130,12 @@ pub fn resolve_session(sessions: &[Session], needle: &str) -> Result<uuid::Uuid,
 /// `maestro send`. Answers with the session that was typed into, so the
 /// caller can name it once the daemon has accepted the text.
 ///
-/// A bare ID skips the catalog fetch; anything else needs the list to match
-/// against. Text comes from the arguments, or from stdin when there is none —
-/// the shape a heredoc or a pipe wants.
+/// Terminal sessions get raw keystrokes via `send_input`; structured sessions
+/// get an ACP prompt via `send_structured_prompt` (`--no-enter` is ignored
+/// there — ACP prompts are always complete messages).
+///
+/// Text comes from the arguments, or from stdin when there is none — the
+/// shape a heredoc or a pipe wants.
 #[allow(clippy::result_large_err)]
 pub async fn run_send(
     client: &DaemonClient,
@@ -138,19 +158,28 @@ pub async fn run_send(
         return Err(CliError::NothingToSend);
     }
 
-    let id = match uuid::Uuid::parse_str(args.session.trim()) {
-        Ok(id) => id,
-        Err(_) => {
-            let sessions = client.list_sessions().await?;
-            resolve_session(&sessions, &args.session)?
-        }
-    };
+    // We always need the session list: even a bare UUID needs the view field
+    // to decide which endpoint to hit.
+    let sessions = client.list_sessions().await?;
+    let id = resolve_session(&sessions, &args.session)?;
+    let view = sessions
+        .iter()
+        .find(|s| s.id == id)
+        .map(|s| s.view)
+        .unwrap_or(SessionView::Terminal);
 
-    let req = SendInputRequest {
-        text,
-        submit: !args.no_enter,
-    };
-    client.send_input(id, &req).await?;
+    match view {
+        SessionView::Structured => {
+            client.send_structured_prompt(id, &text).await?;
+        }
+        SessionView::Terminal => {
+            let req = SendInputRequest {
+                text,
+                submit: !args.no_enter,
+            };
+            client.send_input(id, &req).await?;
+        }
+    }
     Ok(id)
 }
 
@@ -179,8 +208,8 @@ fn print_session_table(out: &mut impl Write, sessions: &[Session], info: &Daemon
     }
     writeln!(
         out,
-        "  {:<36}  {:<8}  {:<9}  {:<28}  {:<40}  {}",
-        "ID", "STATUS", "ACTIVITY", "DIR", "COMMAND", "BLOCKED"
+        "  {:<36}  {:<8}  {:<10}  {:<9}  {:<28}  {:<40}  {}",
+        "ID", "STATUS", "VIEW", "ACTIVITY", "DIR", "COMMAND", "BLOCKED"
     )
     .ok();
     for s in sorted {
@@ -190,11 +219,16 @@ fn print_session_table(out: &mut impl Write, sessions: &[Session], info: &Daemon
             SessionStatus::Running => "running",
             SessionStatus::Dead => "dead",
         };
+        let view = match s.view {
+            SessionView::Terminal => "terminal",
+            SessionView::Structured => "structured",
+        };
         let activity = match s.activity {
             ActivityState::Active => "active",
             ActivityState::Idle => "idle",
             ActivityState::AwaitingInput => "awaiting",
             ActivityState::Error => "error",
+            ActivityState::Starting => "starting",
         };
         // Show the live foreground command alongside the spawn command when
         // the daemon has observed one that differs (NAP-340).
@@ -207,8 +241,8 @@ fn print_session_table(out: &mut impl Write, sessions: &[Session], info: &Daemon
         let blocked = blocked_label(s);
         writeln!(
             out,
-            "  {:<36}  {:<8}  {:<9}  {:<28}  {:<40}  {blocked}",
-            s.id, status, activity, dir, command
+            "  {:<36}  {:<8}  {:<10}  {:<9}  {:<28}  {:<40}  {blocked}",
+            s.id, status, view, activity, dir, command
         )
         .ok();
     }
@@ -230,11 +264,67 @@ mod tests {
     use std::path::PathBuf;
 
     use chrono::{TimeZone, Utc};
-    use maestro_protocol::{ActivityState, Session, SessionStatus};
+    use maestro_protocol::{ActivityState, Session, SessionStatus, SessionView};
     use uuid::Uuid;
 
     use super::DaemonInfo;
 
+    use clap::Parser;
+
+    use crate::cli::{Cli, Command};
+
+    fn spawn_args(extra: &[&str]) -> crate::cli::SpawnArgs {
+        let mut argv = vec!["maestro", "spawn", "--cwd", "/tmp", "--command"];
+        argv.extend_from_slice(extra);
+        let cli = Cli::try_parse_from(argv).expect("parses");
+        let Command::Spawn(args) = cli.command else {
+            panic!("expected spawn")
+        };
+        args
+    }
+
+    /// The CLI follows the two interactive clients: a command with an ACP
+    /// adapter spawns structured unless `--terminal` says otherwise, and
+    /// `--structured` still forces the request for a command this side does
+    /// not recognise.
+    #[test]
+    fn spawn_defaults_to_structured_for_supported_agents() {
+        use super::spawn_view;
+        assert_eq!(
+            spawn_view(&spawn_args(&["claude"])),
+            SessionView::Structured
+        );
+        assert_eq!(
+            spawn_view(&spawn_args(&["npx codex exec"])),
+            SessionView::Structured
+        );
+        assert_eq!(spawn_view(&spawn_args(&["bash"])), SessionView::Terminal);
+        assert_eq!(
+            spawn_view(&spawn_args(&["claude", "--terminal"])),
+            SessionView::Terminal
+        );
+        assert_eq!(
+            spawn_view(&spawn_args(&["opencode", "--structured"])),
+            SessionView::Structured
+        );
+    }
+
+    #[test]
+    fn spawn_refuses_both_view_flags_at_once() {
+        let err = Cli::try_parse_from([
+            "maestro",
+            "spawn",
+            "--cwd",
+            "/tmp",
+            "--command",
+            "claude",
+            "--structured",
+            "--terminal",
+        ])
+        .unwrap_err();
+        assert!(err.to_string().contains("--terminal"), "{err}");
+    }
+
     fn session(cwd: &str, command: &str, id: u128) -> Session {
         Session {
             view: Default::default(),
@@ -286,6 +376,22 @@ mod tests {
         assert!(s.contains("idle"), "{s}");
     }
 
+    #[test]
+    fn table_exposes_terminal_and_structured_views() {
+        let terminal = session("/tmp", "bash", 1);
+        let mut structured = session("/tmp", "claude", 2);
+        structured.view = SessionView::Structured;
+
+        let mut buf = Vec::new();
+        super::print_session_table(&mut buf, &[terminal, structured], &info(""));
+        let out = String::from_utf8(buf).unwrap();
+        let lines: Vec<&str> = out.lines().collect();
+        let header = lines.iter().position(|line| line.contains("VIEW")).unwrap();
+
+        assert!(lines[header + 1].contains("terminal"), "{out}");
+        assert!(lines[header + 2].contains("structured"), "{out}");
+    }
+
     #[test]
     fn live_cwd_overrides_spawn_dir_in_table() {
         let mut s = session("/home/naps/maestro", "bash", 1);

crates/maestro-cli/tests/against_mock_daemon.rs

@@ -2,7 +2,7 @@
 //! was unit-tested, but nothing exercised the client, the error decoding, or
 //! the unreachable-daemon path without compiling and forking a real daemon.
 
-use maestro_protocol::{DaemonClient, DaemonInfo};
+use maestro_protocol::{DaemonClient, DaemonInfo, SessionView};
 use maestro_testing::{session, MockDaemon};
 use uuid::Uuid;
 
@@ -28,6 +28,7 @@ async fn info_carries_version_and_presets() {
             id: "claude".into(),
             label: "Claude".into(),
             command: "claude".into(),
+            auto_approve: false,
         }],
         ..Default::default()
     });
@@ -97,6 +98,7 @@ async fn spawn_round_trips_through_the_daemon() {
             env: Default::default(),
             metadata: Default::default(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .expect("create");
@@ -200,6 +202,35 @@ async fn send_resolves_a_session_by_name() {
     assert_eq!(sent, id);
 }
 
+/// A structured session routes through the ACP prompt endpoint, not the
+/// terminal input one — `--no-enter` is irrelevant (ACP prompts are
+/// complete messages).
+#[tokio::test]
+async fn send_to_structured_session_uses_acp_prompt() {
+    let mock = MockDaemon::start().await;
+    let id = Uuid::from_u128(13);
+    let mut s = session(id, "/tmp", "claude");
+    s.view = SessionView::Structured;
+    mock.add_session(s);
+
+    let args = maestro_cli::cli::SendArgs {
+        session: id.to_string(),
+        text: vec!["fix".into(), "the".into(), "tests".into()],
+        no_enter: false,
+    };
+    let sent = maestro_cli::sessions::run_send(&mock.client(), &args, &mut std::io::empty())
+        .await
+        .expect("send");
+
+    assert_eq!(sent, id);
+    // Terminal input must stay empty — the message went through ACP.
+    assert!(mock.inputs().is_empty());
+    let prompts = mock.structured_prompts();
+    assert_eq!(prompts.len(), 1);
+    assert_eq!(prompts[0].0, id);
+    assert_eq!(prompts[0].1.prompt, "fix the tests");
+}
+
 #[tokio::test]
 async fn send_to_an_unknown_session_fails_without_typing_anything() {
     let mock = MockDaemon::start().await;

crates/maestro-config/src/lib.rs

@@ -313,16 +313,19 @@ pub fn builtin_presets() -> Vec<SpawnPreset> {
             id: "claude".into(),
             label: "Claude".into(),
             command: "claude".into(),
+            auto_approve: false,
         },
         SpawnPreset {
             id: "opencode".into(),
             label: "opencode".into(),
             command: "opencode".into(),
+            auto_approve: false,
         },
         SpawnPreset {
             id: "zsh".into(),
             label: "Shell".into(),
             command: "zsh".into(),
+            auto_approve: false,
         },
     ]
 }
@@ -334,6 +337,7 @@ pub fn custom_preset() -> SpawnPreset {
         id: CUSTOM_PRESET_ID.into(),
         label: "Custom…".into(),
         command: String::new(),
+        auto_approve: false,
     }
 }
 
@@ -515,6 +519,7 @@ auto_install = false
                 id: "fish".into(),
                 label: "fish".into(),
                 command: "fish".into(),
+                auto_approve: false,
             }]),
             ..Default::default()
         };
@@ -551,6 +556,7 @@ auto_install = false
                 id: "  ".into(),
                 label: "x".into(),
                 command: "x".into(),
+                auto_approve: false,
             }]),
             ..Default::default()
         };
@@ -561,6 +567,7 @@ auto_install = false
                 id: "x".into(),
                 label: "x".into(),
                 command: "".into(),
+                auto_approve: false,
             }]),
             ..Default::default()
         };
@@ -578,11 +585,13 @@ auto_install = false
                     id: "a".into(),
                     label: "a".into(),
                     command: "a".into(),
+                    auto_approve: false,
                 },
                 SpawnPreset {
                     id: "a".into(),
                     label: "a2".into(),
                     command: "a2".into(),
+                    auto_approve: false,
                 },
             ]),
             ..Default::default()
@@ -597,6 +606,7 @@ auto_install = false
                 id: "custom".into(),
                 label: "Custom".into(),
                 command: "whatever".into(),
+                auto_approve: false,
             }]),
             ..Default::default()
         };

crates/maestro-daemon/src/gitroot.rs

@@ -80,13 +80,22 @@ mod tests {
     }
 
     #[test]
-    fn non_repo_dir_is_none() {
-        // A temp dir with no `.git` anywhere up the chain. Use the temp root so
-        // the walk can't accidentally hit a real repo above the test's cwd.
+    fn non_repo_dir_does_not_find_root_inside_fixture() {
+        // The fixture has no `.git`, so `find_root` must not return a path
+        // inside it. On hosts where an ancestor of the temp dir *is* a repo
+        // (e.g. `/tmp` lives inside a checkout), the function legitimately
+        // returns that ancestor — the test only asserts the fixture itself
+        // was not mistaken for a repo.
         let tmp = tempfile::tempdir().unwrap();
         let sub = tmp.path().join("plain/dir");
         fs::create_dir_all(&sub).unwrap();
-        assert_eq!(find_root(&sub), None);
+        match find_root(&sub) {
+            None => {} // expected on most hosts
+            Some(root) => assert!(
+                !root.starts_with(tmp.path()),
+                "found .git inside the fixture at {root:?}, but none was created"
+            ),
+        }
     }
 
     #[test]

crates/maestro-daemon/src/local_api.rs

@@ -12,7 +12,8 @@
 
 use std::sync::Arc;
 
-use axum::extract::{Path, Query, State};
+use axum::body::Bytes;
+use axum::extract::{DefaultBodyLimit, Path, Query, State};
 use axum::http::StatusCode;
 use axum::response::{IntoResponse, Response};
 use axum::routing::{any, delete, get, post};
@@ -21,12 +22,13 @@ use maestro_config::SpawnPreset;
 use maestro_protocol::{
     routes, ApiError, CatalogEvent, CreateSessionRequest, DaemonInfo, GitRoot, NameBatch,
     RenameSessionRequest, ReportActivityRequest, SendInputRequest, Session, SetFocusRequest,
-    StructuredApprovalDecision, StructuredEvent, StructuredPromptRequest, PROTOCOL_VERSION,
+    StructuredApprovalDecision, StructuredConfigRequest, StructuredEvent, StructuredPromptRequest,
+    PROTOCOL_VERSION,
 };
 use serde::Deserialize;
 use uuid::Uuid;
 
-use crate::session::{QueueAcpPrompt, SessionManager};
+use crate::session::{QueueAcpPrompt, SessionError, SessionManager, SetAcpConfig};
 use crate::sidecar::EventCursor;
 
 #[derive(Debug, Clone)]
@@ -69,7 +71,12 @@ pub fn router(state: LocalApiState) -> Router {
         .route(routes::patterns::STRUCTURED, any(structured_ws))
         .route(routes::patterns::STRUCTURED_REPLAY, get(structured_replay))
         .route(routes::patterns::STRUCTURED_PROMPT, post(structured_prompt))
+        .route(
+            routes::patterns::STRUCTURED_ATTACHMENT,
+            post(structured_attachment).layer(DefaultBodyLimit::max(20 * 1024 * 1024)),
+        )
         .route(routes::patterns::STRUCTURED_CANCEL, post(structured_cancel))
+        .route(routes::patterns::STRUCTURED_CONFIG, post(structured_config))
         .route(
             routes::patterns::STRUCTURED_APPROVAL,
             post(structured_approval),
@@ -173,12 +180,13 @@ fn dir_error_status(code: &str) -> StatusCode {
 fn session_error_status(code: &str) -> StatusCode {
     match code {
         "not_found" => StatusCode::NOT_FOUND,
-        "invalid_env" => StatusCode::BAD_REQUEST,
+        "invalid_env" | "bad_request" => StatusCode::BAD_REQUEST,
         // A guard refusal is the daemon doing its job, not a failure (#79).
         "kill_guarded" => StatusCode::CONFLICT,
         // The session outlived its pane: nothing to type into, and nothing
         // the daemon can do about it.
         "not_running" => StatusCode::CONFLICT,
+        "not_terminal" => StatusCode::CONFLICT,
         "shutting_down" => StatusCode::SERVICE_UNAVAILABLE,
         _ => StatusCode::BAD_GATEWAY,
     }
@@ -429,13 +437,55 @@ async fn structured_replay(
     }
 }
 
+#[derive(Deserialize)]
+struct AttachmentQuery {
+    name: String,
+}
+
+async fn structured_attachment(
+    State(s): State<LocalApiState>,
+    Path(id): Path<Uuid>,
+    Query(query): Query<AttachmentQuery>,
+    bytes: Bytes,
+) -> Response {
+    let name = query.name;
+    if name.is_empty()
+        || name.len() > 180
+        || name == "."
+        || name == ".."
+        || name
+            .chars()
+            .any(|c| c.is_control() || c == '/' || c == '\\')
+    {
+        return error_response(
+            StatusCode::BAD_REQUEST,
+            "invalid_filename",
+            "use a filename without directory separators, up to 180 bytes",
+        );
+    }
+    match s.manager.store_acp_attachment(id, &name, &bytes).await {
+        Ok(Some(path)) => Json(serde_json::json!({ "path": path })).into_response(),
+        Ok(None) => error_response(
+            StatusCode::CONFLICT,
+            "not_structured",
+            "session is not a live structured session",
+        ),
+        Err(e) => {
+            let info = e.to_error_info();
+            error_response(session_error_status(&info.code), &info.code, &info.message)
+        }
+    }
+}
+
 async fn structured_prompt(
     State(s): State<LocalApiState>,
     Path(id): Path<Uuid>,
     Json(body): Json<StructuredPromptRequest>,
 ) -> Response {
     match s.manager.queue_acp_prompt(id, body.prompt).await {
-        Ok(QueueAcpPrompt::Queued) => StatusCode::NO_CONTENT.into_response(),
+        Ok(QueueAcpPrompt::Queued) | Ok(QueueAcpPrompt::Pending) => {
+            StatusCode::NO_CONTENT.into_response()
+        }
         Ok(QueueAcpPrompt::InFlight) => error_response(
             StatusCode::CONFLICT,
             "turn_in_flight",
@@ -471,6 +521,37 @@ async fn structured_cancel(State(s): State<LocalApiState>, Path(id): Path<Uuid>)
     }
 }
 
+async fn structured_config(
+    State(s): State<LocalApiState>,
+    Path(id): Path<Uuid>,
+    Json(body): Json<StructuredConfigRequest>,
+) -> Response {
+    match s
+        .manager
+        .set_acp_config(id, body.config_id, body.value)
+        .await
+    {
+        Ok(SetAcpConfig::Updated) => StatusCode::NO_CONTENT.into_response(),
+        Ok(SetAcpConfig::InvalidValue) => error_response(
+            StatusCode::BAD_REQUEST,
+            "invalid_config_value",
+            "configuration values must be strings or booleans",
+        ),
+        Ok(SetAcpConfig::Unavailable) => error_response(
+            StatusCode::CONFLICT,
+            "not_structured",
+            "session is not a live structured session",
+        ),
+        Ok(SetAcpConfig::Failed(message)) => {
+            error_response(StatusCode::BAD_GATEWAY, "acp_config_failed", &message)
+        }
+        Err(e) => {
+            let info = e.to_error_info();
+            error_response(session_error_status(&info.code), &info.code, &info.message)
+        }
+    }
+}
+
 async fn structured_approval(
     State(s): State<LocalApiState>,
     Path((id, nonce)): Path<(Uuid, String)>,
@@ -534,12 +615,23 @@ async fn attach_ws(
     State(s): State<LocalApiState>,
     ws: axum::extract::WebSocketUpgrade,
 ) -> Result<Response, Response> {
-    let Some((replay, rx)) = s.manager.subscribe_pty_with_replay(id).await else {
-        return Err(error_response(
-            StatusCode::NOT_FOUND,
-            "unknown_session",
-            "no such session on this daemon",
-        ));
+    let (replay, rx) = match s.manager.subscribe_pty_with_replay(id).await {
+        Ok(subscription) => subscription,
+        Err(SessionError::NotFound(_)) => {
+            return Err(error_response(
+                StatusCode::NOT_FOUND,
+                "unknown_session",
+                "no such session on this daemon",
+            ));
+        }
+        Err(error) => {
+            let info = error.to_error_info();
+            return Err(error_response(
+                session_error_status(&info.code),
+                &info.code,
+                &info.message,
+            ));
+        }
     };
     let manager = s.manager.clone();
     Ok(ws.on_upgrade(move |socket| async move {

crates/maestro-daemon/src/projection.rs

@@ -2,6 +2,7 @@
 
 use std::collections::{HashMap, HashSet};
 
+use chrono::{DateTime, Utc};
 use maestro_acp::schema::{ContentChunk, SessionNotification, SessionUpdate, ToolCall};
 use maestro_protocol::{
     ActivityState, ReducedState, TranscriptDelta, TranscriptRow, TranscriptRowKind,
@@ -37,9 +38,12 @@ pub struct Projection {
     pending_tool_updates: HashMap<String, Vec<maestro_acp::schema::ToolCallUpdateFields>>,
     state: ReducedState,
     active_turn: Option<u64>,
+    active_turn_started_at: Option<DateTime<Utc>>,
+    active_turn_context_tokens: Option<u64>,
     turn_failed: bool,
     next_turn: u64,
     turn_tool_calls: HashSet<String>,
+    anonymous_content_row: Option<(String, String)>,
 }
 
 impl Projection {
@@ -60,6 +64,7 @@ impl Projection {
             SessionUpdate::ToolCall(tool) => self.tool_call(tool),
             SessionUpdate::ToolCallUpdate(update) => self.tool_update(update),
             SessionUpdate::Plan(plan) => {
+                self.anonymous_content_row = None;
                 let data = to_value(plan);
                 self.state.plan = Some(data.clone());
                 Some(self.replace("plan".into(), TranscriptRowKind::Plan, data))
@@ -77,16 +82,20 @@ impl Projection {
             SessionUpdate::ConfigOptionUpdate(options) => {
                 let value = to_value(options);
                 self.state.model = model_from_options(&value).or_else(|| self.state.model.clone());
+                self.state.config_options = Some(value);
                 None
             }
             // ACP deliberately adds notification variants over time. Known but
             // non-transcript updates become a generic notice instead of being
             // dropped or forcing clients to understand ACP's enum.
-            _ => Some(self.append(
-                format!("notice:{seq}"),
-                TranscriptRowKind::Notice,
-                to_value(&notification.update),
-            )),
+            _ => {
+                self.anonymous_content_row = None;
+                Some(self.append(
+                    format!("notice:{seq}"),
+                    TranscriptRowKind::Notice,
+                    to_value(&notification.update),
+                ))
+            }
         };
         ProjectionUpdate {
             transcript,
@@ -122,12 +131,19 @@ impl Projection {
 
     /// Start a prompt turn and return its monotonically increasing token.
     pub fn begin_turn(&mut self) -> (u64, ProjectionUpdate) {
+        self.anonymous_content_row = None;
         self.next_turn += 1;
         let turn = self.next_turn;
         self.active_turn = Some(turn);
+        let started_at = Utc::now();
+        let started_context_tokens = usage_tokens(self.state.usage.as_ref());
+        self.active_turn_started_at = Some(started_at);
+        self.active_turn_context_tokens = started_context_tokens;
         self.turn_failed = false;
         self.state.turn.responding = true;
         self.state.turn.thinking = true;
+        self.state.turn.started_at = Some(started_at);
+        self.state.turn.started_context_tokens = started_context_tokens;
         self.turn_tool_calls.clear();
         self.state.turn.active_tool_calls.clear();
         (
@@ -156,10 +172,44 @@ impl Projection {
         self.turn_failed = lifecycle == TurnLifecycle::Failure;
         self.state.turn.responding = false;
         self.state.turn.thinking = false;
+        let finished_at = Utc::now();
+        let started_at = self.active_turn_started_at.take();
+        let started_context_tokens = self.active_turn_context_tokens.take();
+        self.state.turn.started_at = None;
+        self.state.turn.started_context_tokens = None;
         self.turn_tool_calls.clear();
         self.state.turn.active_tool_calls.clear();
+        let context_tokens = usage_tokens(self.state.usage.as_ref());
+        let context_delta = context_tokens
+            .zip(started_context_tokens)
+            .map(|(end, start)| i128::from(end) - i128::from(start));
+        let elapsed_ms = started_at.map_or(0, |started| {
+            finished_at
+                .signed_duration_since(started)
+                .num_milliseconds()
+                .max(0)
+        });
+        let outcome = match lifecycle {
+            TurnLifecycle::Finish => "completed",
+            TurnLifecycle::Cancel => "cancelled",
+            TurnLifecycle::Failure => "failed",
+            TurnLifecycle::Begin => unreachable!(),
+        };
+        let row = self.append(
+            format!("turn_meta:{}", uuid::Uuid::new_v4()),
+            TranscriptRowKind::Notice,
+            serde_json::json!({
+                "maestroTurnMeta": {
+                    "elapsedMs": elapsed_ms,
+                    "contextTokens": context_tokens,
+                    "contextDelta": context_delta,
+                    "outcome": outcome,
+                    "model": self.state.model,
+                }
+            }),
+        );
         Some(ProjectionUpdate {
-            transcript: None,
+            transcript: Some(row),
             state: self.state(),
         })
     }
@@ -186,7 +236,8 @@ impl Projection {
         }
     }
 
-    pub fn restore_approval(&mut self, row: TranscriptRow) -> ProjectionUpdate {
+    pub fn restore_row(&mut self, row: TranscriptRow) -> ProjectionUpdate {
+        self.anonymous_content_row = None;
         let transcript = if !self.row_index.contains_key(&row.id) {
             self.row_index.insert(row.id.clone(), self.rows.len());
             self.rows.push(row.clone());
@@ -245,12 +296,32 @@ impl Projection {
         kind: TranscriptRowKind,
         prefix: &str,
     ) -> Option<TranscriptDelta> {
-        let id = chunk
-            .message_id
-            .as_ref()
-            .map(|id| format!("{prefix}:{id}"))
-            .unwrap_or_else(|| format!("{prefix}:{seq}"));
         let data = to_value(chunk);
+        let id = if let Some(message_id) = chunk.message_id.as_ref() {
+            self.anonymous_content_row = None;
+            format!("{prefix}:{message_id}")
+        } else {
+            let text = data.pointer("/content/text").and_then(Value::as_str);
+            let previous = self
+                .anonymous_content_row
+                .as_ref()
+                .filter(|(previous_prefix, _)| previous_prefix == prefix)
+                .map(|(_, id)| id.clone());
+            if text.is_some_and(|text| !text.is_empty()) {
+                if let Some(id) = previous {
+                    let index = *self
+                        .row_index
+                        .get(&id)
+                        .expect("anonymous content row remains addressable");
+                    let row = &mut self.rows[index];
+                    append_text(&mut row.data, &data);
+                    return Some(TranscriptDelta::Patch { row: row.clone() });
+                }
+            }
+            let id = format!("{prefix}:{seq}");
+            self.anonymous_content_row = text.map(|_| (prefix.to_owned(), id.clone()));
+            id
+        };
         if let Some(index) = self.row_index.get(&id).copied() {
             let row = &mut self.rows[index];
             append_text(&mut row.data, &data);
@@ -260,6 +331,7 @@ impl Projection {
     }
 
     fn tool_call(&mut self, tool: &ToolCall) -> Option<TranscriptDelta> {
+        self.anonymous_content_row = None;
         let id = format!("tool:{}", tool.tool_call_id);
         let tool_id = tool.tool_call_id.to_string();
         let mut canonical = tool.clone();
@@ -290,6 +362,7 @@ impl Projection {
         &mut self,
         update: &maestro_acp::schema::ToolCallUpdate,
     ) -> Option<TranscriptDelta> {
+        self.anonymous_content_row = None;
         let tool_id = update.tool_call_id.to_string();
         let Some(tool) = self.tools.get_mut(&tool_id) else {
             self.pending_tool_updates
@@ -383,6 +456,10 @@ impl Projection {
     }
 }
 
+fn usage_tokens(usage: Option<&Value>) -> Option<u64> {
+    usage?.get("used")?.as_u64()
+}
+
 fn to_value(value: &impl serde::Serialize) -> Value {
     serde_json::to_value(value).expect("ACP schema values serialize")
 }
@@ -426,7 +503,7 @@ fn model_from_options(value: &Value) -> Option<String> {
 #[cfg(test)]
 mod tests {
     use maestro_acp::schema::SessionNotification;
-    use maestro_protocol::{TranscriptDelta, TranscriptRowKind};
+    use maestro_protocol::{TranscriptDelta, TranscriptRow, TranscriptRowKind};
 
     use super::{Projection, TurnLifecycle};
 
@@ -496,6 +573,137 @@ mod tests {
         );
     }
 
+    #[test]
+    fn projects_the_codex_adapter_fixture_without_provider_specific_rows() {
+        let fixture = include_str!("../tests/fixtures/codex-acp-session.jsonl");
+        let events = fixture
+            .lines()
+            .map(serde_json::from_str::<SessionNotification>)
+            .collect::<Result<Vec<_>, _>>()
+            .expect("Codex ACP fixture follows the supported schema");
+        let mut projection = Projection::default();
+
+        for (seq, event) in events.iter().enumerate() {
+            projection.apply((seq + 1) as u64, event);
+        }
+
+        let rows = projection.snapshot(events.len() as u64).rows;
+        assert_eq!(
+            rows.iter().map(|row| row.kind).collect::<Vec<_>>(),
+            [
+                TranscriptRowKind::User,
+                TranscriptRowKind::AgentThought,
+                TranscriptRowKind::ToolCall,
+                TranscriptRowKind::ToolDiff,
+                TranscriptRowKind::ToolCall,
+                TranscriptRowKind::ToolCall,
+                TranscriptRowKind::ToolCall,
+                TranscriptRowKind::ToolCall,
+                TranscriptRowKind::Plan,
+                TranscriptRowKind::Notice,
+                TranscriptRowKind::Notice,
+                TranscriptRowKind::AgentText,
+            ]
+        );
+        assert_eq!(rows[2].data["rawInput"]["command"], "rg TODO");
+        assert_eq!(rows[2].data["rawOutput"]["exit_code"], 0);
+        assert_eq!(rows[4].data["_meta"]["is_mcp_tool_call"], true);
+        assert_eq!(rows[5].data["rawInput"]["query"], "Agent Client Protocol");
+        assert_eq!(
+            rows[7].data["content"][0]["content"]["mimeType"],
+            "image/png"
+        );
+
+        let state = projection.state();
+        assert_eq!(state.model.as_deref(), Some("gpt-5.3-codex"));
+        assert_eq!(state.mode.as_deref(), Some("agent"));
+        assert_eq!(state.usage.as_ref().unwrap()["used"], 1200);
+        assert_eq!(state.context.as_ref().unwrap()["size"], 258400);
+        assert_eq!(
+            state.config_options.as_ref().unwrap()["configOptions"][2]["currentValue"],
+            "high"
+        );
+    }
+
+    #[test]
+    fn coalesces_anonymous_stream_chunks_without_joining_turns() {
+        let mut projection = Projection::default();
+        let (first_turn, _) = projection.begin_turn();
+        for (seq, text) in [(1, ""), (2, "p"), (3, "ong")] {
+            projection.apply(
+                seq,
+                &event(serde_json::json!({
+                    "sessionUpdate": "agent_message_chunk",
+                    "content": {"type": "text", "text": text},
+                })),
+            );
+        }
+        projection.turn_lifecycle(TurnLifecycle::Finish, first_turn);
+        projection.begin_turn();
+        projection.apply(
+            4,
+            &event(serde_json::json!({
+                "sessionUpdate": "agent_message_chunk",
+                "content": {"type": "text", "text": "next"},
+            })),
+        );
+
+        let rows = projection.snapshot(4).rows;
+        assert_eq!(rows.len(), 3);
+        assert_eq!(rows[0].data.pointer("/content/text").unwrap(), "pong");
+        assert!(rows[1].data.get("maestroTurnMeta").is_some());
+        assert_eq!(rows[2].data.pointer("/content/text").unwrap(), "next");
+    }
+
+    #[test]
+    fn anonymous_empty_chunk_delimits_turns_during_replay() {
+        let mut projection = Projection::default();
+        for (seq, text) in [(1, ""), (2, "visible"), (3, ""), (4, "p"), (5, "ong")] {
+            projection.apply(
+                seq,
+                &event(serde_json::json!({
+                    "sessionUpdate": "agent_message_chunk",
+                    "content": {"type": "text", "text": text},
+                })),
+            );
+        }
+
+        let rows = projection.snapshot(5).rows;
+        assert_eq!(rows.len(), 2);
+        assert_eq!(rows[0].data.pointer("/content/text").unwrap(), "visible");
+        assert_eq!(rows[1].data.pointer("/content/text").unwrap(), "pong");
+    }
+
+    #[test]
+    fn restored_user_prompt_delimits_anonymous_agent_rows() {
+        let mut projection = Projection::default();
+        projection.apply(
+            1,
+            &event(serde_json::json!({
+                "sessionUpdate": "agent_message_chunk",
+                "content": {"type": "text", "text": "before"},
+            })),
+        );
+        projection.restore_row(TranscriptRow {
+            id: "user:prompt".into(),
+            kind: TranscriptRowKind::User,
+            data: serde_json::json!({"content": {"type": "text", "text": "next"}}),
+        });
+        projection.apply(
+            2,
+            &event(serde_json::json!({
+                "sessionUpdate": "agent_message_chunk",
+                "content": {"type": "text", "text": "after"},
+            })),
+        );
+
+        let rows = projection.snapshot(2).rows;
+        assert_eq!(rows.len(), 3);
+        assert_eq!(rows[0].data.pointer("/content/text").unwrap(), "before");
+        assert_eq!(rows[1].kind, TranscriptRowKind::User);
+        assert_eq!(rows[2].data.pointer("/content/text").unwrap(), "after");
+    }
+
     #[test]
     fn tool_update_patches_the_original_stable_row() {
         let mut projection = Projection::default();
@@ -614,6 +822,10 @@ mod tests {
         assert_eq!(state.context.as_ref().unwrap()["size"], 200);
         assert_eq!(state.mode.as_deref(), Some("plan"));
         assert_eq!(state.model.as_deref(), Some("opus"));
+        assert_eq!(
+            state.config_options.as_ref().unwrap()["configOptions"][0]["currentValue"],
+            "opus"
+        );
         assert_eq!(
             state.plan.as_ref().unwrap()["entries"],
             serde_json::json!([])
@@ -685,6 +897,38 @@ mod tests {
         }
     }
 
+    #[test]
+    fn completed_turn_keeps_duration_and_context_delta_in_transcript() {
+        let mut projection = Projection::default();
+        projection.apply(
+            1,
+            &event(serde_json::json!({
+                "sessionUpdate":"usage_update", "used":10_000, "size":200_000
+            })),
+        );
+        let (turn, begun) = projection.begin_turn();
+        assert!(begun.state.turn.started_at.is_some());
+        assert_eq!(begun.state.turn.started_context_tokens, Some(10_000));
+        projection.apply(
+            2,
+            &event(serde_json::json!({
+                "sessionUpdate":"usage_update", "used":12_500, "size":200_000
+            })),
+        );
+
+        let finished = projection
+            .turn_lifecycle(TurnLifecycle::Finish, turn)
+            .expect("active turn finishes");
+        let TranscriptDelta::Append { row } = finished.transcript.unwrap() else {
+            panic!("turn footer");
+        };
+        assert_eq!(row.kind, TranscriptRowKind::Notice);
+        assert_eq!(row.data["maestroTurnMeta"]["contextDelta"], 2_500);
+        assert_eq!(row.data["maestroTurnMeta"]["contextTokens"], 12_500);
+        assert_eq!(row.data["maestroTurnMeta"]["outcome"], "completed");
+        assert!(finished.state.turn.started_at.is_none());
+    }
+
     fn terminal_turn_drops_unfinished_tools(
         terminal: TurnLifecycle,
         unfinished_id: &str,
@@ -703,7 +947,9 @@ mod tests {
 
         projection.turn_lifecycle(terminal, turn);
         assert!(projection.state().turn.active_tool_calls.is_empty());
-        assert_eq!(projection.snapshot(1).rows.len(), 1);
+        let rows = projection.snapshot(1).rows;
+        assert_eq!(rows.len(), 2);
+        assert!(rows[1].data.get("maestroTurnMeta").is_some());
 
         projection.begin_turn();
         projection.apply(
@@ -829,7 +1075,7 @@ mod tests {
             panic!("approval row")
         };
         let mut recovered = Projection::default();
-        let update = recovered.restore_approval(row.clone());
+        let update = recovered.restore_row(row.clone());
         assert_eq!(
             update.transcript,
             Some(TranscriptDelta::Append { row: row.clone() })

crates/maestro-daemon/src/sidecar.rs

@@ -263,9 +263,15 @@ pub struct LoggedEvent {
 #[derive(Debug, Clone, PartialEq, serde::Serialize, serde::Deserialize)]
 #[serde(tag = "maestroEvent", rename_all = "snake_case")]
 pub enum PersistedEvent {
+    User {
+        row: TranscriptRow,
+    },
     Approval {
         row: TranscriptRow,
     },
+    Turn {
+        row: TranscriptRow,
+    },
     #[serde(skip)]
     Notification(Box<SessionNotification>),
 }

crates/maestro-daemon/tests/acp.rs

@@ -11,7 +11,7 @@ use std::time::{Duration, Instant};
 
 use common::{init_bare_repo, init_repo, push_all_to_origin, wait_for_async, DaemonFixture};
 use maestro_acp::schema::{ContentBlock, SessionUpdate};
-use maestro_acp::{ADAPTER_BIN, INSTALL_COMMAND};
+use maestro_acp::{AcpAdapter, ADAPTER_BIN};
 use maestro_daemon::projection::TurnLifecycle;
 use maestro_daemon::sidecar::{EventCursor, SidecarStore};
 use maestro_daemon::worktree::WorktreeManager;
@@ -38,6 +38,7 @@ impl Fake {
         let bin = dir.path().join("bin");
         std::fs::create_dir_all(&bin).unwrap();
         std::fs::copy(fake_agent(), bin.join(ADAPTER_BIN)).unwrap();
+        std::fs::copy(fake_agent(), bin.join(AcpAdapter::Codex.binary())).unwrap();
         Self { dir }
     }
 
@@ -96,13 +97,22 @@ fn event_text(event: &maestro_daemon::sidecar::LoggedEvent) -> &str {
 }
 
 fn structured(cwd: &Path, env: HashMap<String, String>) -> CreateSessionRequest {
+    structured_command(cwd, env, "claude")
+}
+
+fn structured_command(
+    cwd: &Path,
+    env: HashMap<String, String>,
+    command: &str,
+) -> CreateSessionRequest {
     CreateSessionRequest {
         view: SessionView::Structured,
         cwd: cwd.to_path_buf(),
-        command: "claude".into(),
+        command: command.into(),
         env,
         metadata: HashMap::new(),
         worktree: None,
+        auto_approve: false,
     }
 }
 
@@ -120,6 +130,25 @@ async fn wait_for_exit(pid: u32) {
     assert!(!pid_alive(pid), "pid {pid} still alive");
 }
 
+/// Wait for a session's background ACP handshake to complete (activity
+/// transitions out of `Starting`). Returns the refreshed session.
+async fn wait_for_ready(manager: &SessionManager, id: uuid::Uuid) -> maestro_protocol::Session {
+    let deadline = Instant::now() + Duration::from_secs(10);
+    loop {
+        let session = manager
+            .snapshot()
+            .await
+            .into_iter()
+            .find(|s| s.id == id)
+            .expect("session exists");
+        if session.activity != ActivityState::Starting {
+            return session;
+        }
+        assert!(Instant::now() < deadline, "handshake timed out");
+        tokio::time::sleep(Duration::from_millis(20)).await;
+    }
+}
+
 #[tokio::test]
 async fn structured_spawn_starts_the_adapter_in_cwd_with_session_env() {
     let fx = DaemonFixture::new();
@@ -128,14 +157,22 @@ async fn structured_spawn_starts_the_adapter_in_cwd_with_session_env() {
     let mut env = fake.env();
     env.insert("FAKE_ACP_ECHO_ENV".into(), "MAESTRO_SESSION_ID".into());
 
-    let session = fx
+    let created = fx
         .manager
-        .create(structured(cwd.path(), env))
+        .create(structured_command(
+            cwd.path(),
+            env,
+            "codex --dangerously-bypass-approvals-and-sandbox",
+        ))
         .await
         .expect("create");
 
-    assert_eq!(session.view, SessionView::Structured);
-    assert_eq!(session.status, SessionStatus::Running);
+    assert_eq!(created.view, SessionView::Structured);
+    assert_eq!(created.status, SessionStatus::Running);
+    assert_eq!(created.activity, ActivityState::Starting);
+    assert!(created.acp_session_id.is_none());
+
+    let session = wait_for_ready(&fx.manager, created.id).await;
     assert_eq!(session.activity, ActivityState::Idle);
     let acp_id = session.acp_session_id.clone().expect("acp session id");
     assert!(acp_id.starts_with("fake-"), "{acp_id}");
@@ -150,7 +187,7 @@ async fn structured_spawn_starts_the_adapter_in_cwd_with_session_env() {
         "{log}"
     );
     assert!(
-        log.contains(&format!("env MAESTRO_SESSION_ID={}", session.id)),
+        log.contains(&format!("env MAESTRO_SESSION_ID={}", created.id)),
         "{log}"
     );
 
@@ -215,9 +252,10 @@ async fn structured_activity_tracks_turn_completion_and_failure() {
     env.insert("FAKE_ACP_PROMPT_FAIL_ONCE".into(), "1".into());
     let session = fx
         .manager
-        .create(structured(cwd.path(), env))
+        .create(structured_command(cwd.path(), env, "codex"))
         .await
         .unwrap();
+    let session = wait_for_ready(&fx.manager, session.id).await;
 
     assert!(matches!(
         fx.manager
@@ -281,11 +319,12 @@ async fn projection_snapshot_and_live_stream_share_one_fold() {
     let fx = DaemonFixture::new();
     let fake = Fake::new();
     let cwd = TempDir::new().unwrap();
-    let session = fx
+    let created = fx
         .manager
         .create(structured(cwd.path(), fake.env()))
         .await
         .expect("create");
+    let session = wait_for_ready(&fx.manager, created.id).await;
 
     wait_for_async(Duration::from_secs(5), || async {
         fx.manager
@@ -349,12 +388,76 @@ async fn projection_snapshot_and_live_stream_share_one_fold() {
         .await
         .expect("finish lifecycle broadcast")
         .expect("projection broadcast");
-    assert_eq!(finish.transcript, None);
+    let Some(TranscriptDelta::Append { row }) = finish.transcript else {
+        panic!("finish should append durable turn metadata");
+    };
+    assert_eq!(row.kind, TranscriptRowKind::Notice);
+    assert_eq!(row.data["maestroTurnMeta"]["outcome"], "completed");
     assert_eq!(finish.state.turn, Default::default());
 
+    let recovered = fx
+        .manager
+        .read_acp_projection_replay(session.id, EventCursor::Since(0), 10)
+        .await
+        .expect("turn replay")
+        .expect("structured session");
+    assert!(recovered.iter().any(|event| {
+        matches!(
+            &event.transcript,
+            Some(TranscriptDelta::Append { row })
+                if row.data["maestroTurnMeta"]["outcome"] == "completed"
+        )
+    }));
+
     fx.manager.kill(session.id, false).await.expect("kill");
 }
 
+#[tokio::test]
+async fn queued_prompt_is_a_durable_user_transcript_row() {
+    let fx = DaemonFixture::new();
+    let fake = Fake::new();
+    let cwd = TempDir::new().unwrap();
+    let session = fx
+        .manager
+        .create(structured(cwd.path(), fake.env()))
+        .await
+        .expect("create");
+    let session = wait_for_ready(&fx.manager, session.id).await;
+
+    assert!(matches!(
+        fx.manager
+            .queue_acp_prompt(session.id, "show my prompt".into())
+            .await
+            .expect("queue prompt"),
+        maestro_daemon::session::QueueAcpPrompt::Queued
+    ));
+
+    let (snapshot, _, _) = fx
+        .manager
+        .subscribe_acp_projection(session.id, EventCursor::Since(0))
+        .await
+        .expect("projection subscription")
+        .expect("structured session");
+    let user = snapshot
+        .rows
+        .iter()
+        .find(|row| row.kind == TranscriptRowKind::User)
+        .expect("user prompt row");
+    assert_eq!(user.data["content"]["text"], "show my prompt");
+
+    let persisted = fx
+        .manager
+        .read_acp_events(session.id, EventCursor::Since(0), 100)
+        .expect("event replay");
+    assert!(persisted.iter().any(|event| matches!(
+        &event.event,
+        maestro_daemon::sidecar::PersistedEvent::User { row }
+            if row.data["content"]["text"] == "show my prompt"
+    )));
+
+    fx.manager.kill(session.id, false).await.unwrap();
+}
+
 #[tokio::test]
 async fn stale_turn_completion_cannot_end_the_next_turn() {
     let fx = DaemonFixture::new();
@@ -365,6 +468,7 @@ async fn stale_turn_completion_cannot_end_the_next_turn() {
         .create(structured(cwd.path(), fake.env()))
         .await
         .unwrap();
+    wait_for_ready(&fx.manager, session.id).await;
 
     let maestro_daemon::session::BeginAcpTurn::Started(_, first) =
         fx.manager.begin_acp_turn(session.id).await.unwrap()
@@ -408,6 +512,7 @@ async fn cancelled_prompt_that_never_settles_fails_the_session() {
         .create(structured(cwd.path(), env))
         .await
         .unwrap();
+    wait_for_ready(&fx.manager, session.id).await;
 
     assert!(matches!(
         fx.manager
@@ -446,6 +551,7 @@ async fn cancellation_settlement_allows_the_next_prompt_permission() {
         .create(structured(cwd.path(), env))
         .await
         .unwrap();
+    wait_for_ready(&fx.manager, session.id).await;
 
     assert!(matches!(
         fx.manager
@@ -505,11 +611,12 @@ async fn recovery_loads_the_acp_session_without_duplicating_history() {
     let mut env = fake.env();
     env.insert("FAKE_ACP_LOAD_REPLAY".into(), "2".into());
 
-    let session = fx
+    let created = fx
         .manager
-        .create(structured(cwd.path(), env))
+        .create(structured_command(cwd.path(), env, "codex"))
         .await
         .expect("create");
+    let session = wait_for_ready(&fx.manager, created.id).await;
     let acp_id = session.acp_session_id.clone().expect("acp id");
     wait_for_async(Duration::from_secs(5), || async {
         fx.manager
@@ -621,7 +728,7 @@ async fn shutdown_preserves_a_pristine_structured_worktree_for_recovery() {
         .create(CreateSessionRequest {
             view: SessionView::Structured,
             cwd: repo.path().to_path_buf(),
-            command: "claude".into(),
+            command: "codex".into(),
             env: fake.env(),
             metadata: HashMap::new(),
             worktree: Some(WorktreeSpec {
@@ -629,10 +736,12 @@ async fn shutdown_preserves_a_pristine_structured_worktree_for_recovery() {
                 branch: branch.into(),
                 create_branch: true,
             }),
+            auto_approve: false,
         })
         .await
         .expect("create");
     assert_eq!(session.cwd, worktree);
+    wait_for_ready(&fx.manager, session.id).await;
     push_all_to_origin(repo.path(), origin.path());
 
     fx.manager.shutdown().await;
@@ -681,6 +790,7 @@ async fn failed_recovery_cleans_its_fifo() {
         .create(structured(cwd.path(), fake.env()))
         .await
         .expect("create");
+    wait_for_ready(&fx.manager, session.id).await;
     let old_pid = fake.pid();
     fx.manager.shutdown().await;
     wait_for_exit(old_pid).await;
@@ -714,28 +824,56 @@ async fn missing_adapter_yields_a_failed_session_naming_the_install_command() {
         empty.path().to_string_lossy().into_owned(),
     )]);
 
-    let session = fx
+    let created = fx
         .manager
-        .create(structured(cwd.path(), env))
+        .create(structured_command(cwd.path(), env, "codex"))
         .await
-        .expect("a failed session, not an error");
+        .expect("create registers a Starting session");
+    assert_eq!(created.activity, ActivityState::Starting);
 
+    // The background handshake fails because the adapter binary is missing.
+    let session = wait_for_ready(&fx.manager, created.id).await;
     assert_eq!(session.status, SessionStatus::Dead);
     assert_eq!(session.activity, ActivityState::Error);
     let detail = session.activity_detail.clone().expect("actionable detail");
-    assert!(detail.contains(ADAPTER_BIN), "{detail}");
-    assert!(detail.contains(INSTALL_COMMAND), "{detail}");
+    assert!(detail.contains(AcpAdapter::Codex.binary()), "{detail}");
+    assert!(
+        detail.contains(AcpAdapter::Codex.install_command()),
+        "{detail}"
+    );
     assert_eq!(session.acp_session_id, None);
 
     // It is a real session: listed, on disk, and dismissable like any other
     // dead one.
-    assert!(fx.manager.has(session.id).await);
+    assert!(fx.manager.has(created.id).await);
     assert!(fx
         .sidecar_dir()
-        .join(format!("{}.json", session.id))
+        .join(format!("{}.json", created.id))
         .exists());
-    fx.manager.kill(session.id, false).await.expect("dismiss");
-    assert!(!fx.manager.has(session.id).await);
+    fx.manager.kill(created.id, false).await.expect("dismiss");
+    assert!(!fx.manager.has(created.id).await);
+}
+
+#[tokio::test]
+async fn unsupported_structured_command_fails_without_launching_claude() {
+    let fx = DaemonFixture::new();
+    let fake = Fake::new();
+    let cwd = TempDir::new().unwrap();
+
+    let err = fx
+        .manager
+        .create(structured_command(cwd.path(), fake.env(), "opencode"))
+        .await
+        .expect_err("unsupported command is rejected at request validation");
+
+    assert!(
+        matches!(err, maestro_daemon::SessionError::BadRequest(ref msg) if msg.contains("Claude Code or Codex")),
+        "{err:?}"
+    );
+    assert!(
+        fake.log().is_empty(),
+        "unsupported command launched an adapter"
+    );
 }
 
 #[tokio::test]
@@ -750,6 +888,7 @@ async fn kill_sends_cancel_then_sigterm_and_removes_the_sidecar() {
         .create(structured(cwd.path(), fake.env()))
         .await
         .expect("create");
+    wait_for_ready(&fx.manager, session.id).await;
     let pid = fake.pid();
     assert!(pid_alive(pid));
 
@@ -792,6 +931,8 @@ async fn shutdown_reaps_every_adapter_child() {
         .create(structured(cwd.path(), b.env()))
         .await
         .expect("create b");
+    wait_for_ready(&fx.manager, sa.id).await;
+    wait_for_ready(&fx.manager, sb.id).await;
     let (pa, pb) = (a.pid(), b.pid());
     assert!(pid_alive(pa) && pid_alive(pb));
 
@@ -826,10 +967,13 @@ async fn dismissal_during_shutdown_does_not_restore_recovery_artifacts() {
         .create(structured(cwd.path(), env))
         .await
         .expect("create");
-    fx.manager
+    let blocker_session = fx
+        .manager
         .create(structured(cwd.path(), blocker.env()))
         .await
         .expect("create blocker");
+    wait_for_ready(&fx.manager, session.id).await;
+    wait_for_ready(&fx.manager, blocker_session.id).await;
 
     let manager = fx.manager.clone();
     let shutdown = tokio::spawn(async move { manager.shutdown().await });
@@ -881,6 +1025,7 @@ async fn shutdown_does_not_recover_an_adapter_that_already_exited() {
         .create(structured(cwd.path(), env))
         .await
         .expect("create");
+    wait_for_ready(&fx.manager, session.id).await;
     wait_for_exit(fake.pid()).await;
 
     fx.manager.shutdown().await;
@@ -914,23 +1059,31 @@ async fn shutdown_waits_for_structured_creation_and_rejects_new_creates() {
     let mut env = fake.env();
     env.insert("FAKE_ACP_DELAY_SESSION_NEW_MS".into(), "500".into());
 
-    let create_cwd = cwd.path().to_path_buf();
-    let manager = fx.manager.clone();
-    let create = tokio::spawn(async move { manager.create(structured(&create_cwd, env)).await });
+    // create() returns immediately; the handshake runs in the background
+    // and holds a lifecycle permit.
+    let session = fx
+        .manager
+        .create(structured(cwd.path(), env))
+        .await
+        .expect("create");
+
+    // Wait until the adapter has received session/new (handshake in progress).
     wait_for_async(Duration::from_secs(5), || async {
         fake.log().contains("recv session/new")
     })
     .await;
 
+    // Shutdown must wait for the in-flight background handshake.
     let manager = fx.manager.clone();
     let shutdown = tokio::spawn(async move { manager.shutdown().await });
     tokio::time::sleep(Duration::from_millis(50)).await;
     assert!(
         !shutdown.is_finished(),
-        "shutdown returned before create finished"
+        "shutdown returned before handshake finished"
     );
 
-    let session = create.await.expect("create task").expect("create");
+    // The handshake completes in the background (500ms delay).
+    wait_for_ready(&fx.manager, session.id).await;
     let pid = fake.pid();
     shutdown.await.expect("shutdown task");
 
@@ -950,6 +1103,194 @@ async fn shutdown_waits_for_structured_creation_and_rejects_new_creates() {
     assert_eq!(fake.log().matches("signal SIGTERM").count(), 1);
 }
 
+#[tokio::test]
+async fn structured_handshakes_run_independently() {
+    let fx = DaemonFixture::new();
+    let blocked = Fake::new();
+    let ready = Fake::new();
+    let cwd = TempDir::new().unwrap();
+    let gate = cwd.path().join("release-first");
+    let mut blocked_env = blocked.env();
+    blocked_env.insert(
+        "FAKE_ACP_SESSION_NEW_GATE".into(),
+        gate.to_string_lossy().into_owned(),
+    );
+
+    // Both create() calls return immediately with Starting; the first
+    // adapter's handshake is gated while the second runs freely.
+    let first = fx
+        .manager
+        .create(structured(cwd.path(), blocked_env))
+        .await
+        .expect("first create");
+    let second = fx
+        .manager
+        .create(structured(cwd.path(), ready.env()))
+        .await
+        .expect("second create");
+
+    // The second handshake completes independently of the first.
+    let second_ready = wait_for_ready(&fx.manager, second.id).await;
+    assert_eq!(second_ready.activity, ActivityState::Idle);
+
+    // The first handshake is still blocked.
+    let first_snap = fx
+        .manager
+        .snapshot()
+        .await
+        .into_iter()
+        .find(|s| s.id == first.id)
+        .unwrap();
+    assert_eq!(first_snap.activity, ActivityState::Starting);
+
+    std::fs::write(&gate, b"release").unwrap();
+    let first_ready = wait_for_ready(&fx.manager, first.id).await;
+    assert_eq!(first_ready.activity, ActivityState::Idle);
+
+    fx.manager.kill(first.id, false).await.expect("kill first");
+    fx.manager
+        .kill(second.id, false)
+        .await
+        .expect("kill second");
+}
+
+#[tokio::test]
+async fn shutdown_waits_for_every_admitted_structured_create() {
+    let fx = DaemonFixture::new();
+    let a = Fake::new();
+    let b = Fake::new();
+    let late = Fake::new();
+    let cwd = TempDir::new().unwrap();
+    let gate_a = cwd.path().join("release-a");
+    let gate_b = cwd.path().join("release-b");
+    let mut env_a = a.env();
+    let mut env_b = b.env();
+    env_a.insert(
+        "FAKE_ACP_SESSION_NEW_GATE".into(),
+        gate_a.to_string_lossy().into_owned(),
+    );
+    env_b.insert(
+        "FAKE_ACP_SESSION_NEW_GATE".into(),
+        gate_b.to_string_lossy().into_owned(),
+    );
+
+    // Both create() calls return immediately; the background handshake
+    // tasks hold lifecycle permits and are blocked on their gates.
+    let session_a = fx
+        .manager
+        .create(structured(cwd.path(), env_a))
+        .await
+        .expect("create a");
+    let session_b = fx
+        .manager
+        .create(structured(cwd.path(), env_b))
+        .await
+        .expect("create b");
+    wait_for_async(Duration::from_secs(5), || async {
+        a.log().contains("recv session/new") && b.log().contains("recv session/new")
+    })
+    .await;
+
+    let shutdown = {
+        let manager = fx.manager.clone();
+        tokio::spawn(async move { manager.shutdown().await })
+    };
+    wait_for_async(Duration::from_secs(5), || async {
+        matches!(
+            fx.manager.create(structured(cwd.path(), late.env())).await,
+            Err(maestro_daemon::SessionError::ShuttingDown)
+        )
+    })
+    .await;
+    assert!(!shutdown.is_finished());
+
+    std::fs::write(&gate_a, b"release").unwrap();
+    wait_for_ready(&fx.manager, session_a.id).await;
+    assert!(
+        !shutdown.is_finished(),
+        "shutdown ignored the second create"
+    );
+
+    std::fs::write(&gate_b, b"release").unwrap();
+    wait_for_ready(&fx.manager, session_b.id).await;
+    shutdown.await.expect("shutdown task");
+
+    wait_for_exit(a.pid()).await;
+    wait_for_exit(b.pid()).await;
+    assert_eq!(
+        fx.manager.status(session_a.id).await,
+        Some(SessionStatus::Dead)
+    );
+    assert_eq!(
+        fx.manager.status(session_b.id).await,
+        Some(SessionStatus::Dead)
+    );
+}
+
+#[tokio::test]
+async fn killing_a_starting_session_rolls_back_and_settles_admission() {
+    let fx = DaemonFixture::new();
+    let fake = Fake::new();
+    let repo = TempDir::new().unwrap();
+    init_repo(repo.path());
+    let gate = repo.path().join("release-create");
+    let mut env = fake.env();
+    env.insert("FAKE_ACP_ECHO_ENV".into(), "MAESTRO_SESSION_ID".into());
+    env.insert(
+        "FAKE_ACP_SESSION_NEW_GATE".into(),
+        gate.to_string_lossy().into_owned(),
+    );
+    let request = CreateSessionRequest {
+        view: SessionView::Structured,
+        cwd: repo.path().to_path_buf(),
+        command: "claude".into(),
+        env,
+        metadata: HashMap::new(),
+        worktree: Some(WorktreeSpec {
+            base_repo: repo.path().to_path_buf(),
+            branch: "cancelled-create".into(),
+            create_branch: true,
+        }),
+        auto_approve: false,
+    };
+
+    // create() returns immediately with Starting; the handshake is gated.
+    let session = fx.manager.create(request).await.expect("create");
+    assert_eq!(session.activity, ActivityState::Starting);
+    wait_for_async(Duration::from_secs(5), || async {
+        fake.log().contains("recv session/new")
+    })
+    .await;
+    let pid = fake.pid();
+
+    // Kill the session while its handshake is still in progress.
+    // force=true because the worktree has an unpushed branch commit.
+    fx.manager.kill(session.id, true).await.expect("kill");
+
+    // Release the gate so the background task can finish and settle.
+    std::fs::write(&gate, b"release").unwrap();
+
+    // Shutdown must not hang — the lifecycle permit is settled.
+    tokio::time::timeout(Duration::from_secs(5), fx.manager.shutdown())
+        .await
+        .expect("shutdown hung on a settled permit");
+
+    wait_for_exit(pid).await;
+    assert!(fx.manager.snapshot().await.is_empty());
+    let id = session.id.to_string();
+    assert!(
+        std::fs::read_dir(fx.sidecar_dir())
+            .into_iter()
+            .flatten()
+            .all(|entry| !entry
+                .unwrap()
+                .file_name()
+                .to_string_lossy()
+                .starts_with(&id)),
+        "killed Starting session left a sidecar artifact"
+    );
+}
+
 #[tokio::test]
 async fn shutdown_drains_final_notifications_to_the_log() {
     let fx = DaemonFixture::new();
@@ -963,6 +1304,7 @@ async fn shutdown_drains_final_notifications_to_the_log() {
         .create(structured(cwd.path(), env))
         .await
         .expect("create");
+    wait_for_ready(&fx.manager, session.id).await;
     wait_for_async(Duration::from_secs(5), || async {
         fx.manager
             .read_acp_events(session.id, EventCursor::Since(0), 10)
@@ -993,6 +1335,7 @@ async fn adapter_exit_marks_the_session_dead_and_keeps_it_listed() {
         .create(structured(cwd.path(), fake.env()))
         .await
         .expect("create");
+    wait_for_ready(&fx.manager, session.id).await;
     fx.manager.start_liveness_watcher(Duration::from_millis(50));
 
     // The agent dies out from under the daemon: the liveness pass, not tmux,

crates/maestro-daemon/tests/activity_report.rs

@@ -48,6 +48,7 @@ async fn spawn_sleeping(manager: &SessionManager) -> Uuid {
             env: Default::default(),
             metadata: Default::default(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .unwrap()

crates/maestro-daemon/tests/attach.rs

@@ -81,6 +81,7 @@ async fn create_bash_session(h: &Harness) -> Uuid {
             env: HashMap::new(),
             metadata: HashMap::new(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .unwrap();

crates/maestro-daemon/tests/autoname.rs

@@ -56,6 +56,7 @@ async fn spawn(manager: &SessionManager, name: Option<&str>) -> Uuid {
             env: Default::default(),
             metadata,
             worktree: None,
+            auto_approve: false,
         })
         .await
         .unwrap()

crates/maestro-daemon/tests/blocked_work_cost.rs

@@ -29,6 +29,7 @@ fn request(cwd: &std::path::Path, repo: &std::path::Path, branch: &str) -> Creat
             branch: branch.into(),
             create_branch: true,
         }),
+        auto_approve: false,
     }
 }
 

crates/maestro-daemon/tests/fixtures/codex-acp-session.jsonl

@@ -0,0 +1,16 @@
+{"sessionId":"codex-session","update":{"sessionUpdate":"user_message_chunk","messageId":"user-1","content":{"type":"text","text":"Inspect the repository"}}}
+{"sessionId":"codex-session","update":{"sessionUpdate":"agent_thought_chunk","messageId":"thought-1","content":{"type":"text","text":"I should inspect the files first."}}}
+{"sessionId":"codex-session","update":{"sessionUpdate":"tool_call","toolCallId":"command-1","kind":"execute","title":"rg TODO","status":"in_progress","rawInput":{"command":"rg TODO","cwd":"/workspace"}}}
+{"sessionId":"codex-session","update":{"sessionUpdate":"tool_call_update","toolCallId":"command-1","status":"completed","rawOutput":{"formatted_output":"src/lib.rs: TODO","exit_code":0}}}
+{"sessionId":"codex-session","update":{"sessionUpdate":"tool_call","toolCallId":"change-1","kind":"edit","title":"Editing files","status":"completed","content":[{"type":"diff","path":"src/lib.rs","oldText":"old","newText":"new"}]}}
+{"sessionId":"codex-session","update":{"sessionUpdate":"tool_call","toolCallId":"mcp-1","kind":"execute","title":"mcp.github.search","status":"completed","rawInput":{"server":"github","tool":"search","arguments":{"query":"ACP"}},"rawOutput":{"result":"found"},"_meta":{"is_mcp_tool_call":true}}}
+{"sessionId":"codex-session","update":{"sessionUpdate":"tool_call","toolCallId":"web-1","kind":"search","title":"Search the web for ACP","status":"completed","rawInput":{"type":"webSearch","query":"Agent Client Protocol"}}}
+{"sessionId":"codex-session","update":{"sessionUpdate":"tool_call","toolCallId":"image-view-1","kind":"read","title":"View Image /workspace/diagram.png","status":"completed","content":[{"type":"content","content":{"type":"resource_link","name":"/workspace/diagram.png","uri":"/workspace/diagram.png"}}]}}
+{"sessionId":"codex-session","update":{"sessionUpdate":"tool_call","toolCallId":"image-gen-1","title":"Image generation","status":"completed","content":[{"type":"content","content":{"type":"image","data":"aW1hZ2U=","mimeType":"image/png"}}],"rawOutput":{"path":"/workspace/generated.png"}}}
+{"sessionId":"codex-session","update":{"sessionUpdate":"plan","entries":[{"content":"Implement compatibility fixture","priority":"medium","status":"in_progress"}]}}
+{"sessionId":"codex-session","update":{"sessionUpdate":"usage_update","used":1200,"size":258400}}
+{"sessionId":"codex-session","update":{"sessionUpdate":"current_mode_update","currentModeId":"agent"}}
+{"sessionId":"codex-session","update":{"sessionUpdate":"config_option_update","configOptions":[{"id":"agent-mode","name":"Agent mode","category":"mode","type":"select","currentValue":"agent","options":[{"value":"read-only","name":"Read-only"},{"value":"agent","name":"Agent"}]},{"id":"model","name":"Model","category":"model","type":"select","currentValue":"gpt-5.3-codex","options":[{"value":"gpt-5.3-codex","name":"GPT-5.3-Codex"}]},{"id":"reasoning_effort","name":"Reasoning effort","category":"thought_level","type":"select","currentValue":"high","options":[{"value":"high","name":"High"}]},{"id":"fast-mode","name":"Fast mode","category":"model_config","type":"select","currentValue":"off","options":[{"value":"off","name":"Off"}]}]}}
+{"sessionId":"codex-session","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"status","description":"Show session status"}]}}
+{"sessionId":"codex-session","update":{"sessionUpdate":"session_info_update","title":"Codex session"}}
+{"sessionId":"codex-session","update":{"sessionUpdate":"agent_message_chunk","messageId":"assistant-1","content":{"type":"text","text":"Done."}}}

crates/maestro-daemon/tests/local_api.rs

@@ -154,7 +154,8 @@ async fn structured_session(h: &Harness, fake: &FakeAcp) -> Uuid {
 }
 
 async fn structured_session_with_env(h: &Harness, env: HashMap<String, String>) -> Uuid {
-    h.manager
+    let id = h
+        .manager
         .create(CreateSessionRequest {
             view: SessionView::Structured,
             cwd: "/tmp".into(),
@@ -162,10 +163,13 @@ async fn structured_session_with_env(h: &Harness, env: HashMap<String, String>)
             env,
             metadata: HashMap::new(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .unwrap()
-        .id
+        .id;
+    wait_for_session_activity(h, id, ActivityState::Idle).await;
+    id
 }
 
 async fn wait_for_session_activity(h: &Harness, id: Uuid, expected: ActivityState) {
@@ -234,6 +238,60 @@ async fn structured_ws_sends_snapshot_then_live_projection() {
     );
 }
 
+#[tokio::test]
+async fn structured_attachments_preserve_bytes_and_reject_paths() {
+    let h = spawn("attachments").await;
+    let fake = FakeAcp::new();
+    let id = structured_session(&h, &fake).await;
+    let client = reqwest::Client::new();
+    let endpoint = url(
+        h.addr,
+        &format!("/api/sessions/{id}/structured/attachments"),
+    );
+    let bytes = vec![0, 255, 10, 13];
+    let response = client
+        .post(&endpoint)
+        .query(&[("name", "sample.bin")])
+        .body(bytes.clone())
+        .send()
+        .await
+        .unwrap();
+    assert_eq!(response.status(), 200);
+    let body: serde_json::Value = response.json().await.unwrap();
+    let path = body["path"].as_str().unwrap();
+    assert!(Path::new(path).is_absolute());
+    assert_eq!(std::fs::read(path).unwrap(), bytes);
+    for name in ["../escape", "a/b", "a\\b", "..", ""] {
+        let response = client
+            .post(&endpoint)
+            .query(&[("name", name)])
+            .body("text")
+            .send()
+            .await
+            .unwrap();
+        assert_eq!(response.status(), 400, "{name}");
+    }
+    let response = client
+        .post(&endpoint)
+        .query(&[("name", "large.bin")])
+        .body(vec![0; 20 * 1024 * 1024 + 1])
+        .send()
+        .await
+        .unwrap();
+    assert_eq!(response.status(), 413);
+    let response = client
+        .post(url(
+            h.addr,
+            &format!("/api/sessions/{}/structured/attachments", Uuid::new_v4()),
+        ))
+        .query(&[("name", "file.txt")])
+        .body("text")
+        .send()
+        .await
+        .unwrap();
+    assert_eq!(response.status(), 404);
+}
+
 #[tokio::test]
 async fn structured_prompt_rejects_a_second_in_flight_turn_and_cancel_clears_it() {
     let h = spawn("naps-laptop").await;
@@ -493,6 +551,7 @@ async fn structured_prompt_rejects_unknown_and_unavailable_sessions() {
             env: HashMap::new(),
             metadata: HashMap::new(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .unwrap();
@@ -626,6 +685,7 @@ async fn structured_replay_rejects_unknown_terminal_and_dead_sessions() {
             env: HashMap::new(),
             metadata: HashMap::new(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .unwrap();
@@ -768,6 +828,7 @@ async fn list_sessions_starts_empty_and_reflects_creates() {
         env: HashMap::new(),
         metadata: HashMap::new(),
         worktree: None,
+        auto_approve: false,
     };
     let created: Session = reqwest::Client::new()
         .post(url(h.addr, "/api/sessions"))
@@ -942,7 +1003,9 @@ async fn names_honors_count_and_caps_it() {
 #[tokio::test]
 async fn gitroot_probes_path() {
     // #26: resolves the query against the daemon home dir and walks up for a
-    // `.git`. A `/tmp`-rooted temp dir is not in a repo, so the root is null.
+    // `.git`. The tempdir itself has no `.git`, so the result must either be
+    // null (no repo anywhere above) or — in sandboxed environments where /tmp
+    // itself sits inside a repo — a path strictly above the tempdir.
     let h = spawn("naps-laptop").await;
     let tmp = tempfile::tempdir().unwrap();
     let resp: serde_json::Value = reqwest::get(url(
@@ -957,7 +1020,16 @@ async fn gitroot_probes_path() {
     .json()
     .await
     .unwrap();
-    assert!(resp.get("root").is_none() || resp["root"].is_null());
+    // On hosts where an ancestor of the temp dir is a repo (e.g. `/tmp`
+    // inside a checkout), the root legitimately points there. The test only
+    // asserts no root was found *inside* the temp dir.
+    match resp.get("root").and_then(|v| v.as_str()) {
+        None => {}
+        Some(root) => assert!(
+            !root.starts_with(tmp.path().to_string_lossy().as_ref()),
+            "found a repo root inside the fixture at {root:?}"
+        ),
+    }
 }
 
 #[tokio::test]
@@ -985,6 +1057,7 @@ async fn patch_session_renames_it() {
             env: HashMap::new(),
             metadata: HashMap::new(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .unwrap();
@@ -1028,6 +1101,7 @@ async fn post_focus_stamps_last_focused_at() {
             env: HashMap::new(),
             metadata: HashMap::new(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .unwrap();
@@ -1062,6 +1136,7 @@ async fn delete_owned_session_kills_it() {
             env: HashMap::new(),
             metadata: HashMap::new(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .unwrap();
@@ -1084,6 +1159,7 @@ async fn spawn_via_manager(h: &Harness) -> Uuid {
             env: HashMap::new(),
             metadata: HashMap::new(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .unwrap()
@@ -1198,6 +1274,7 @@ async fn delete_a_session_whose_worktree_holds_unsaved_work_returns_409_with_the
                 branch: "feat/guarded".into(),
                 create_branch: true,
             }),
+            auto_approve: false,
         })
         .await
         .unwrap();
@@ -1251,6 +1328,7 @@ async fn delete_with_force_ends_the_session_and_keeps_the_worktree() {
                 branch: "feat/guarded".into(),
                 create_branch: true,
             }),
+            auto_approve: false,
         })
         .await
         .unwrap();
@@ -1281,6 +1359,7 @@ async fn attach_ws_streams_pty_bytes() {
             env: HashMap::new(),
             metadata: HashMap::new(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .unwrap();
@@ -1311,6 +1390,39 @@ async fn attach_ws_streams_pty_bytes() {
     assert!(saw_hello, "PTY did not echo through the attach WS");
 }
 
+#[tokio::test]
+async fn pty_routes_reject_structured_sessions_as_not_terminal() {
+    let h = spawn("naps-laptop").await;
+    let fake = FakeAcp::new();
+    let id = structured_session(&h, &fake).await;
+
+    let response = reqwest::Client::new()
+        .post(url(h.addr, &format!("/api/sessions/{id}/input")))
+        .json(&maestro_protocol::SendInputRequest {
+            text: "ignored".into(),
+            submit: false,
+        })
+        .send()
+        .await
+        .unwrap();
+    assert_eq!(response.status(), reqwest::StatusCode::CONFLICT);
+    let error: ApiError = response.json().await.unwrap();
+    assert_eq!(error.error.code, "not_terminal");
+    assert_eq!(error.error.message, "session is not a terminal session");
+
+    let error = connect_async(ws_url(h.addr, &format!("/api/attach/{id}")))
+        .await
+        .expect_err("structured session must not upgrade to a PTY socket");
+    let tokio_tungstenite::tungstenite::Error::Http(response) = error else {
+        panic!("expected an HTTP handshake rejection, got {error}");
+    };
+    assert_eq!(response.status(), reqwest::StatusCode::CONFLICT);
+    let body = response.body().as_deref().expect("ApiError response body");
+    let error: ApiError = serde_json::from_slice(body).unwrap();
+    assert_eq!(error.error.code, "not_terminal");
+    assert_eq!(error.error.message, "session is not a terminal session");
+}
+
 #[tokio::test]
 async fn attach_ws_for_unknown_session_returns_404() {
     let h = spawn("naps-laptop").await;
@@ -1350,6 +1462,7 @@ async fn events_ws_sends_a_snapshot_then_streams_deltas() {
             env: HashMap::new(),
             metadata: HashMap::new(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .expect("create");
@@ -1395,6 +1508,12 @@ async fn events_ws_streams_structured_activity_without_hook_overrides() {
     let maestro_protocol::CatalogEvent::SessionAdded { session } = next_event(&mut ws).await else {
         panic!("expected structured SessionAdded")
     };
+    assert_eq!(session.activity, ActivityState::Starting);
+    // The background handshake completes and sends SessionUpdated → Idle.
+    let maestro_protocol::CatalogEvent::SessionUpdated { session } = next_event(&mut ws).await
+    else {
+        panic!("expected SessionUpdated after handshake")
+    };
     assert_eq!(session.activity, ActivityState::Idle);
 
     let client = reqwest::Client::new();
@@ -1462,6 +1581,7 @@ async fn every_events_subscriber_gets_its_own_snapshot() {
             env: HashMap::new(),
             metadata: HashMap::new(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .expect("create");

crates/maestro-daemon/tests/rename.rs

@@ -57,6 +57,7 @@ async fn spawn_named(manager: &SessionManager, name: Option<&str>) -> Uuid {
             env: Default::default(),
             metadata,
             worktree: None,
+            auto_approve: false,
         })
         .await
         .unwrap()

crates/maestro-daemon/tests/session_decisions.rs

@@ -70,6 +70,7 @@ impl Fx {
             env: HashMap::new(),
             metadata: HashMap::new(),
             worktree: None,
+            auto_approve: false,
         }
     }
 }

crates/maestro-daemon/tests/session_manager.rs

@@ -28,6 +28,7 @@ async fn create_then_kill_round_trip() {
             env: HashMap::new(),
             metadata: HashMap::new(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .expect("create");
@@ -70,6 +71,7 @@ async fn create_appends_to_spawn_history() {
             env: HashMap::new(),
             metadata: HashMap::from([("name".into(), serde_json::json!("neon-drifter"))]),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .expect("create");
@@ -100,6 +102,7 @@ async fn create_without_history_logs_nothing() {
             env: HashMap::new(),
             metadata: HashMap::new(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .expect("create");
@@ -123,6 +126,7 @@ async fn recover_adopts_existing_tmux_sessions() {
             env: HashMap::new(),
             metadata: HashMap::new(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .expect("create");
@@ -166,6 +170,7 @@ async fn create_captures_initial_output_in_replay_buffer() {
             env: HashMap::new(),
             metadata: HashMap::new(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .expect("create");
@@ -215,6 +220,7 @@ async fn attach_replay_is_the_current_screen_not_the_byte_tail() {
             env: HashMap::new(),
             metadata: HashMap::new(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .expect("create");
@@ -273,6 +279,7 @@ async fn attach_replay_carries_the_panes_mouse_modes() {
             env: HashMap::new(),
             metadata: HashMap::new(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .expect("create");
@@ -324,6 +331,7 @@ async fn recover_re_pipes_pane_so_output_reaches_subscribers() {
             env: HashMap::new(),
             metadata: HashMap::new(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .expect("create");
@@ -387,6 +395,7 @@ async fn pty_broadcast_delivers_bytes_to_subscribers() {
             env: HashMap::new(),
             metadata: HashMap::new(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .unwrap();
@@ -438,6 +447,7 @@ async fn liveness_watcher_marks_dead_sessions_and_keeps_them_until_dismissed() {
             env: HashMap::new(),
             metadata: HashMap::new(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .expect("create");
@@ -508,6 +518,7 @@ async fn watcher_refreshes_the_blocked_work_indicator() {
                 branch: "feat/indicator".into(),
                 create_branch: true,
             }),
+            auto_approve: false,
         })
         .await
         .expect("create");
@@ -601,6 +612,7 @@ async fn kill_removes_worktree_even_when_spec_says_keep() {
                 branch: "feat/keep".into(),
                 create_branch: true,
             }),
+            auto_approve: false,
         })
         .await
         .expect("create");
@@ -639,6 +651,7 @@ async fn killing_refuses_a_worktree_with_unsaved_work_and_keeps_the_session() {
                 branch: "feat/guarded".into(),
                 create_branch: true,
             }),
+            auto_approve: false,
         })
         .await
         .expect("create");
@@ -703,6 +716,7 @@ async fn killing_refuses_until_the_branch_is_pushed() {
                 branch: "feat/pushed".into(),
                 create_branch: true,
             }),
+            auto_approve: false,
         })
         .await
         .expect("create");
@@ -753,6 +767,7 @@ async fn force_killing_a_guarded_worktree_leaves_it_on_disk() {
                 branch: "feat/forced".into(),
                 create_branch: true,
             }),
+            auto_approve: false,
         })
         .await
         .expect("create");
@@ -799,6 +814,7 @@ async fn force_on_a_clear_worktree_removes_it_as_usual() {
                 branch: "feat/clear".into(),
                 create_branch: true,
             }),
+            auto_approve: false,
         })
         .await
         .expect("create");
@@ -840,6 +856,7 @@ async fn killing_an_ignored_only_worktree_succeeds() {
                 branch: "feat/rusty".into(),
                 create_branch: true,
             }),
+            auto_approve: false,
         })
         .await
         .expect("create");
@@ -882,6 +899,7 @@ async fn natural_exit_of_a_guarded_worktree_leaves_it_on_disk() {
                 branch: "feat/exited".into(),
                 create_branch: true,
             }),
+            auto_approve: false,
         })
         .await
         .expect("create");
@@ -944,6 +962,7 @@ async fn natural_exit_of_a_pristine_worktree_removes_it() {
                 branch: "feat/clean".into(),
                 create_branch: true,
             }),
+            auto_approve: false,
         })
         .await
         .expect("create");
@@ -1001,6 +1020,7 @@ async fn liveness_watcher_leaves_running_sessions_alone() {
             env: HashMap::new(),
             metadata: HashMap::new(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .expect("create");
@@ -1040,6 +1060,7 @@ async fn worktree_base_repo_records_the_main_checkout_not_the_request() {
                 branch: "feat/one".into(),
                 create_branch: true,
             }),
+            auto_approve: false,
         })
         .await
         .expect("create first");
@@ -1058,6 +1079,7 @@ async fn worktree_base_repo_records_the_main_checkout_not_the_request() {
                 branch: "feat/two".into(),
                 create_branch: true,
             }),
+            auto_approve: false,
         })
         .await
         .expect("create second");
@@ -1093,6 +1115,7 @@ async fn spawned_sessions_export_maestro_session_id_and_url() {
             env: HashMap::new(),
             metadata: HashMap::new(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .expect("create");
@@ -1132,6 +1155,7 @@ async fn a_freshly_created_session_has_never_been_focused() {
             env: HashMap::new(),
             metadata: HashMap::new(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .expect("create");
@@ -1158,6 +1182,7 @@ async fn set_focused_true_stamps_last_focused_at() {
             env: HashMap::new(),
             metadata: HashMap::new(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .expect("create");
@@ -1207,6 +1232,7 @@ async fn attaching_stamps_last_focused_at() {
             env: HashMap::new(),
             metadata: HashMap::new(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .expect("create");

crates/maestro-daemon/tests/worktree.rs

@@ -405,15 +405,17 @@ fn run_git(dir: &std::path::Path, args: &[&str]) {
     );
 }
 
-/// 49ab7e9: a new-branch add onto a name that already exists suffixes the
-/// branch (and so the directory) instead of failing, per docs/WORKTREES.md.
+/// `git worktree add -b` alone fails outright when the branch already exists,
+/// even with the target directory free — a random handle commonly collides
+/// with one an earlier, already-removed worktree left behind. `add_new`
+/// sidesteps it on the branch name itself instead of erroring (#77).
 #[test]
-fn add_new_suffixes_when_branch_already_exists() {
+fn add_new_suffixes_branch_name_on_branch_collision() {
     let repo_dir = TempDir::new().unwrap();
     let repo = repo_dir.path().to_path_buf();
     init_repo(&repo);
 
-    // pre-create the branch
+    // pre-create the branch, unused by any worktree.
     let status = Command::new("git")
         .arg("-C")
         .arg(&repo)
@@ -425,9 +427,17 @@ fn add_new_suffixes_when_branch_already_exists() {
     let wt_root = TempDir::new().unwrap();
     let mgr = WorktreeManager::new(Some(wt_root.path().to_path_buf()));
 
-    let path = mgr.add_new(&repo, "feat/dup").unwrap();
+    let path = mgr
+        .add_new(&repo, "feat/dup")
+        .expect("sidesteps the branch collision");
     assert!(path.ends_with("feat/dup-2"), "{}", path.display());
-    assert!(path.is_dir());
+    assert!(path.exists());
+
+    // The pre-existing branch is untouched; the new worktree checked out the
+    // suffixed one instead of erroring or adopting `feat/dup`.
+    let branches = worktree_branches(&repo);
+    assert!(branches.contains(&"feat/dup-2".to_string()), "{branches:?}");
+    assert!(!branches.contains(&"feat/dup".to_string()), "{branches:?}");
 }
 
 /// The project picker lists linked worktrees as pickable rows, so `base_repo`

crates/maestro-e2e/tests/e2e.rs

@@ -33,6 +33,7 @@ fn create_req(cwd: &std::path::Path, command: &str) -> CreateSessionRequest {
         env: HashMap::new(),
         metadata: HashMap::new(),
         worktree: None,
+        auto_approve: false,
     }
 }
 
@@ -111,6 +112,7 @@ fn worktree_req(base: &std::path::Path, branch: &str, create_branch: bool) -> Cr
         env: HashMap::new(),
         metadata: HashMap::new(),
         worktree: Some(worktree_spec(base, branch, create_branch)),
+        auto_approve: false,
     }
 }
 
@@ -206,6 +208,7 @@ async fn kill_removes_clean_worktree() {
         env: HashMap::new(),
         metadata: HashMap::new(),
         worktree: Some(worktree_spec(base.path(), "feature/e2e", true)),
+        auto_approve: false,
     };
 
     let s = client.spawn_session(&req).await.expect("spawn worktree");
@@ -260,6 +263,7 @@ async fn kill_refuses_worktree_with_uncommitted_changes() {
         env: HashMap::new(),
         metadata: HashMap::new(),
         worktree: Some(worktree_spec(base.path(), "feature/unsaved", true)),
+        auto_approve: false,
     };
 
     let s = client.spawn_session(&req).await.expect("spawn worktree");
@@ -319,6 +323,7 @@ async fn spawn_on_existing_branch_checks_it_out() {
         env: HashMap::new(),
         metadata: HashMap::new(),
         worktree: Some(worktree_spec(base.path(), "feature/existing", false)),
+        auto_approve: false,
     };
 
     let s = client
@@ -383,13 +388,11 @@ async fn spawn_new_branch_creates_worktree_and_runs_in_it() {
     client.kill_session(s.id).await.expect("kill");
 }
 
-/// #66: a second spawn onto an *existing* branch that already has a worktree
-/// is rejected with a structured worktree error; the first worktree stays
-/// intact. (A second `create_branch: true` spawn is a different case: 49ab7e9
-/// suffixes the new branch name instead, see
-/// `colliding_branch_name_gets_suffixed_too`.)
+/// #66/#77: a second spawn onto the same branch used to be rejected outright;
+/// since the branch-collision suffixing landed, it succeeds instead — the
+/// second worktree lands on `<branch>-2` and the first stays untouched.
 #[tokio::test(flavor = "multi_thread")]
-async fn second_spawn_on_same_branch_is_rejected() {
+async fn second_spawn_on_same_branch_gets_suffixed() {
     let (_daemon, client) = bring_up().await;
 
     let base = TempDir::new().unwrap();
@@ -399,28 +402,33 @@ async fn second_spawn_on_same_branch_is_rejected() {
         .spawn_session(&worktree_req(base.path(), "feature/dup", true))
         .await
         .expect("first spawn");
-    let dup = client
-        .spawn_session(&worktree_req(base.path(), "feature/dup", false))
-        .await;
-    match dup {
-        Err(maestro_e2e::ClientError::Api(maestro_protocol::ClientError::Api { info, .. })) => {
-            assert_eq!(
-                info.code, "worktree_failed",
-                "expected worktree error: {info:?}"
-            );
-        }
-        other => panic!("expected rejection for duplicate branch, got {other:?}"),
-    }
+    let second = client
+        .spawn_session(&worktree_req(base.path(), "feature/dup", true))
+        .await
+        .expect("second spawn suffixes instead of rejecting");
 
-    // Exactly one registration, one directory, still usable.
-    // Count branch records only: the worktree path now contains the branch
-    // name too (`worktrees/feature/dup`), so a substring match over every line
-    // would count the same tree twice.
-    let holders = git_worktree_list(base.path())
-        .iter()
-        .filter(|w| w.as_str() == "branch refs/heads/feature/dup")
-        .count();
-    assert_eq!(holders, 1, "duplicate spawn must not register another tree");
+    let suffixed = base.path().join("worktrees").join("feature").join("dup-2");
+    assert_eq!(
+        second.cwd, suffixed,
+        "second worktree must land on the suffixed path"
+    );
+    assert!(suffixed.is_dir());
+
+    // Both registrations exist: the original branch, untouched, and the
+    // suffixed one the second spawn created.
+    let registrations = git_worktree_list(base.path());
+    assert!(
+        registrations
+            .iter()
+            .any(|l| l.as_str() == "branch refs/heads/feature/dup"),
+        "original branch must stay registered: {registrations:?}"
+    );
+    assert!(
+        registrations
+            .iter()
+            .any(|l| l.as_str() == "branch refs/heads/feature/dup-2"),
+        "suffixed branch must be registered too: {registrations:?}"
+    );
     assert!(
         base.path()
             .join("worktrees")
@@ -431,7 +439,8 @@ async fn second_spawn_on_same_branch_is_rejected() {
     );
 
     let _origin = throwaway_origin(base.path());
-    client.kill_session(first.id).await.expect("kill");
+    client.kill_session(first.id).await.expect("kill first");
+    client.kill_session(second.id).await.expect("kill second");
 }
 
 /// #66/#56: when the client picks a *linked worktree* as base_repo, placement
@@ -823,6 +832,7 @@ async fn natural_exit_settles_dirty_and_pristine_worktrees_differently() {
             env: HashMap::new(),
             metadata: HashMap::new(),
             worktree: Some(worktree_spec(dirty_repo.path(), "feature/messy", true)),
+            auto_approve: false,
         })
         .await
         .expect("spawn dirty");
@@ -872,6 +882,7 @@ fn create_req_cmd(cwd: &std::path::Path, command: &str, branch: &str) -> CreateS
         env: HashMap::new(),
         metadata: HashMap::new(),
         worktree: Some(worktree_spec(cwd, branch, true)),
+        auto_approve: false,
     }
 }
 
@@ -1064,6 +1075,7 @@ async fn sigterm_stops_structured_child_before_events_ws_drains() {
             env: fake.env.clone(),
             metadata: HashMap::new(),
             worktree: None,
+            auto_approve: false,
         })
         .await
         .expect("spawn structured session");

crates/maestro-protocol/src/display.rs

@@ -166,45 +166,32 @@ pub fn merge_linear<T>(folder: TreeFolder<T>) -> TreeFolder<T> {
     cur
 }
 
-/// Command wrappers that run another program: the program is what follows.
-const WRAPPERS: [&str; 8] = [
-    "sudo", "env", "npx", "bunx", "uvx", "pnpm", "yarn", "command",
-];
-
 /// The program a command line runs, basenamed and stripped of its arguments —
 /// what a session card shows per `docs/SIDEBAR.md`, which names the program
 /// and never its flags. Leading `FOO=bar` assignments and wrappers (`sudo`,
-/// `npx`, `pnpm dlx`, …) are looked through. Mirrors the web's `splitCommand`.
+/// `npx`, `pnpm dlx`, …) are looked through, and quoting/escaping is honoured
+/// (never evaluated — no `$var`/`` `cmd` ``/`$(cmd)` expansion). A command a
+/// shell would need real grammar for (pipelines, `&&`/`;`, redirections,
+/// substitution, an unterminated quote) falls back to the naive first word
+/// rather than guessing through it (#199). Mirrors the web's `splitCommand`.
 pub fn command_program(command: &str) -> String {
-    let words: Vec<&str> = command.split_whitespace().collect();
-    let mut i = 0;
-    while i < words.len() {
-        let word = words[i];
-        if is_env_assignment(word) {
-            i += 1;
-            continue;
-        }
-        let wrapper = basename(word).to_lowercase();
-        if WRAPPERS.contains(&wrapper.as_str()) {
-            i += 1;
-            if (wrapper == "pnpm" || wrapper == "yarn") && words.get(i) == Some(&"dlx") {
-                i += 1;
-            }
-            continue;
-        }
-        break;
-    }
-    match words.get(i) {
-        Some(word) => basename(word).to_string(),
-        // Nothing but wrappers and assignments: say what was there rather than
-        // rendering an empty fragment.
-        None => command.trim().to_string(),
+    match resolve(command) {
+        Some(r) => match r.words.get(r.program_index) {
+            Some(word) => basename(word).to_string(),
+            // Nothing but wrappers and assignments: say what was there
+            // rather than rendering an empty fragment.
+            None => command.trim().to_string(),
+        },
+        None => legacy_first_word(command),
     }
 }
 
 /// Program name (already basenamed and lowercased) -> the tool id its mark
 /// stands for. Mirrors the web's `BY_PROGRAM` in `web/src/toolIcon.ts`;
 /// recognition is deliberately narrow, so an unrecognised program has no tool.
+/// `claude-code-acp` — the daemon's actual structured-session child — is
+/// deliberately absent: the daemon launches it directly and ignores
+/// `req.command`, so it is never itself a valid user-facing launch form.
 const BY_PROGRAM: [(&str, &str); 17] = [
     ("claude", "claude"),
     ("claude-code", "claude"),
@@ -226,29 +213,500 @@ const BY_PROGRAM: [(&str, &str); 17] = [
 ];
 
 /// The tool id a command line's icon stands for (`claude`, `codex`,
-/// `opencode`, ...), or `None` when the program is not one we have a mark for.
-/// The command bar matches this field (`docs/COMMAND-BAR.md`), so it must name
-/// the same tools the web's `splitCommand().tool` does.
+/// `opencode`, ...), or `None` when the program is not one we have a mark for
+/// — including a command line [`resolve`] would only guess at. The command
+/// bar matches this field (`docs/COMMAND-BAR.md`), so it must name the same
+/// tools the web's `splitCommand().tool` does.
 pub fn command_tool(command: &str) -> Option<&'static str> {
-    let program = command_program(command).to_lowercase();
+    let r = resolve(command)?;
+    let program = basename(r.words.get(r.program_index)?).to_lowercase();
     BY_PROGRAM
         .iter()
         .find(|(name, _)| *name == program)
         .map(|(_, tool)| *tool)
 }
 
-/// `FOO=bar`, the shell's own prefix for one command's environment.
-fn is_env_assignment(word: &str) -> bool {
-    let mut chars = word.chars();
+/// Whether a command line resolves to an agent Maestro can run as a
+/// structured (ACP) session — Claude Code or Codex, the two adapters
+/// `docs/STRUCTURED-VIEW.md` lists. Every client gates its structured-view
+/// control on this, and the daemon rejects a `Structured` request for
+/// anything else, so the answer has to come from one place.
+pub fn supports_structured_view(command: &str) -> bool {
+    matches!(command_tool(command), Some("claude" | "codex"))
+}
+
+/// [`resolve`]'s outcome: the tokenized command line, and the index within it
+/// of the word that is the actual program (past every assignment/wrapper it
+/// resolved through).
+struct Resolution {
+    words: Vec<String>,
+    program_index: usize,
+}
+
+/// Tokenize `command` and walk past leading `FOO=bar` assignments and known
+/// wrapper forms (interleaved in any order/count) to find the program. An
+/// assignment run is only consumed at the very start of the line or right
+/// after a wrapper whose own semantics accept one there ([`Wrapper::accepts_assignment`]) —
+/// `command FOO=1 claude` and `nohup FOO=1 claude` stop at `FOO=1` rather than
+/// skipping to `claude`, since `command`/`nohup` just exec their next argument
+/// as the program, they don't setenv from an assignment-shaped one (#199).
+/// `None` when [`tokenize`] can't safely make sense of the line at all.
+fn resolve(command: &str) -> Option<Resolution> {
+    let words = tokenize(command)?;
+    let refs: Vec<&str> = words.iter().map(|w| w.text.as_str()).collect();
+    let mut i = 0;
+    let mut assignment_allowed = true;
+    loop {
+        if assignment_allowed {
+            while matches!(words.get(i), Some(word) if is_env_assignment(word)) {
+                i += 1;
+            }
+        }
+        let Some(word) = words.get(i) else { break };
+        let wrapper = basename(&word.text).to_lowercase();
+        let Some(w) = wrapper_resolver(&wrapper) else {
+            break;
+        };
+        match (w.resolve)(&refs, i) {
+            Some(next) if next > i => {
+                i = next;
+                assignment_allowed = w.accepts_assignment;
+            }
+            // Not a form of the wrapper we recognise (an unknown option, or
+            // — for `pnpm`/`yarn`/`bun` — no `dlx`/`x` subcommand behind it):
+            // the wrapper word itself is the program, not a launcher.
+            _ => break,
+        }
+    }
+    Some(Resolution {
+        words: words.into_iter().map(|w| w.text).collect(),
+        program_index: i,
+    })
+}
+
+/// The naive "first whitespace word, basenamed" reading used only when
+/// [`tokenize`] rejects the line outright — still something sane to show,
+/// never a wrapper/tool match to act on.
+fn legacy_first_word(command: &str) -> String {
+    match command.split_whitespace().next() {
+        Some(word) => basename(word).to_string(),
+        None => command.trim().to_string(),
+    }
+}
+
+/// One token from [`tokenize`]: its dequoted text, and — when both the name
+/// and `=` were entirely unquoted/unescaped in the source — the byte length
+/// of the name. Quoting or escaping either (`"FOO"=1`, `F\OO=1`, `FOO\=1`)
+/// makes the word an executable named `FOO=1`; quoting/escaping only the value
+/// preserves the assignment, matching Bash's assignment-word grammar (#199).
+#[derive(Debug, Clone, PartialEq, Eq)]
+struct Word {
+    text: String,
+    plain_eq: Option<usize>,
+}
+
+/// Word-split `command` the way a shell would (honouring `'…'`, `"…"` and
+/// `\` quoting/escaping — POSIX quote *removal*, not evaluation) and return
+/// `None` the moment it needs real shell grammar this resolver doesn't
+/// attempt: a pipeline/list operator (`|`, `&`, `;`, `<`, `>`), a subshell or
+/// substitution (`(`, `)`, `` ` ``, `$(`), an unescaped newline (a command
+/// separator, like `;` — #199), or an unterminated quote/escape. Never
+/// expands `$var`/`` `cmd` ``/`$(cmd)` — a bare `$` is kept literal. A
+/// backslash immediately before a newline, quoted or not, is a line
+/// continuation: removed entirely rather than embedding the newline or
+/// ending the word (#199).
+fn tokenize(command: &str) -> Option<Vec<Word>> {
+    let mut words = Vec::new();
+    let mut current = String::new();
+    let mut has_current = false;
+    let mut plain_eq: Option<usize> = None;
+    let mut assignment_name_is_plain = true;
+    let mut chars = command.chars().peekable();
+
+    while let Some(c) = chars.next() {
+        match c {
+            ' ' | '\t' | '\r' => {
+                if has_current {
+                    words.push(Word {
+                        text: std::mem::take(&mut current),
+                        plain_eq: plain_eq.take(),
+                    });
+                    has_current = false;
+                    assignment_name_is_plain = true;
+                }
+            }
+            '\n' => return None,
+            '|' | '&' | ';' | '<' | '>' | '(' | ')' | '`' => return None,
+            '$' if chars.peek() == Some(&'(') => return None,
+            '\'' => {
+                has_current = true;
+                if plain_eq.is_none() {
+                    assignment_name_is_plain = false;
+                }
+                loop {
+                    match chars.next() {
+                        Some('\'') => break,
+                        Some(c2) => current.push(c2),
+                        None => return None, // unterminated single quote
+                    }
+                }
+            }
+            '"' => {
+                has_current = true;
+                if plain_eq.is_none() {
+                    assignment_name_is_plain = false;
+                }
+                loop {
+                    match chars.next() {
+                        Some('"') => break,
+                        Some('\\') => match chars.next() {
+                            Some(c2 @ ('"' | '\\' | '$' | '`')) => current.push(c2),
+                            Some('\n') => {} // line continuation, removed entirely
+                            Some(c2) => {
+                                current.push('\\');
+                                current.push(c2);
+                            }
+                            None => return None, // trailing backslash
+                        },
+                        Some(c2) => current.push(c2),
+                        None => return None, // unterminated double quote
+                    }
+                }
+            }
+            '\\' => match chars.next() {
+                Some('\n') => {} // line continuation, removed entirely
+                Some(c2) => {
+                    has_current = true;
+                    if plain_eq.is_none() {
+                        assignment_name_is_plain = false;
+                    }
+                    current.push(c2);
+                }
+                None => return None, // trailing backslash
+            },
+            other => {
+                has_current = true;
+                if other == '=' && plain_eq.is_none() && assignment_name_is_plain {
+                    plain_eq = Some(current.len());
+                }
+                current.push(other);
+            }
+        }
+    }
+    if has_current {
+        words.push(Word {
+            text: current,
+            plain_eq,
+        });
+    }
+    Some(words)
+}
+
+/// A wrapper's known `-`/`--` options: which take no value, and which
+/// consume either a following word or a `--flag=value` as theirs. A
+/// `-`-prefixed word this table doesn't know halts resolution rather than
+/// guessing past it (#199) — callers read that as [`OptionTable::consume`]
+/// returning `None`.
+struct OptionTable {
+    flags: &'static [&'static str],
+    valued: &'static [&'static str],
+    /// Whether this wrapper's short options may be combined (`-iv`) or take
+    /// an attached value (`-uroot`), the way real getopt-based tools do
+    /// (#199). JS-toolchain wrappers (`npx`, `pnpm`, `yarn`, bun's `x`/
+    /// `dlx`) don't get this — guessing at bundling they don't actually
+    /// support would resolve through options they'd reject outright.
+    bundles_short_options: bool,
+}
+
+impl OptionTable {
+    /// Consume this table's options starting at `words[i]`, returning the
+    /// index just past them (which may equal `i` if there are none) — or
+    /// `None` on an option this table doesn't recognise, or a valued option
+    /// missing its operand.
+    fn consume(&self, words: &[&str], mut i: usize) -> Option<usize> {
+        loop {
+            let Some(&word) = words.get(i) else {
+                return Some(i);
+            };
+            if word == "--" {
+                return Some(i + 1);
+            }
+            if word == "-" || !word.starts_with('-') {
+                return Some(i);
+            }
+            if let Some((flag, value)) = word.split_once('=') {
+                return if self.valued.contains(&flag) && !value.is_empty() {
+                    i += 1;
+                    continue;
+                } else {
+                    None
+                };
+            }
+            if self.flags.contains(&word) {
+                i += 1;
+                continue;
+            }
+            if self.valued.contains(&word) {
+                let value = words.get(i + 1)?;
+                if value.is_empty() || value.starts_with('-') {
+                    return None;
+                }
+                i += 2;
+                continue;
+            }
+            if self.bundles_short_options
+                && !word.starts_with("--")
+                && word.len() > 2
+                && self.matches_short_cluster(word)
+            {
+                i += 1;
+                continue;
+            }
+            return None;
+        }
+    }
+
+    /// `-iv` (bundled boolean short flags) or `-uroot` (a valued short
+    /// option with its value attached) — getopt's traditional short-option
+    /// forms. `false` the moment a character isn't a short option this
+    /// table knows, or a valued one ends the word with no attached value
+    /// left to be its operand (#199: rejected rather than guessed to come
+    /// from the next word instead).
+    fn matches_short_cluster(&self, word: &str) -> bool {
+        if !word.is_ascii() {
+            return false;
+        }
+        let bytes = word.as_bytes();
+        let mut buf = [b'-', 0];
+        let mut idx = 1;
+        while idx < bytes.len() {
+            buf[1] = bytes[idx];
+            let short = std::str::from_utf8(&buf).expect("ascii buffer");
+            if self.flags.contains(&short) {
+                idx += 1;
+                continue;
+            }
+            if self.valued.contains(&short) {
+                return idx + 1 < bytes.len();
+            }
+            return false;
+        }
+        true
+    }
+}
+
+const NO_OPTIONS: OptionTable = OptionTable {
+    flags: &[],
+    valued: &[],
+    bundles_short_options: false,
+};
+
+const ENV_OPTS: OptionTable = OptionTable {
+    flags: &[
+        "-i",
+        "--ignore-environment",
+        "-0",
+        "--null",
+        "-v",
+        "--debug",
+    ],
+    valued: &["-u", "--unset", "-C", "--chdir"],
+    bundles_short_options: true,
+};
+
+const SUDO_OPTS: OptionTable = OptionTable {
+    flags: &[
+        "-i",
+        "--login",
+        "-n",
+        "--non-interactive",
+        "-E",
+        "--preserve-env",
+        "-H",
+        "--set-home",
+        "-A",
+        "--askpass",
+        "-b",
+        "--background",
+        "-k",
+        "--reset-timestamp",
+        "-K",
+        "--remove-timestamp",
+        "-S",
+        "--stdin",
+    ],
+    valued: &["-u", "--user", "-g", "--group"],
+    bundles_short_options: true,
+};
+
+/// `-v`/`-V` only print what would run — they never execute it — so
+/// resolving through them would claim a program runs that `command` never
+/// launches (#199). Only `-p`, which still executes normally, is safe to
+/// look through.
+const COMMAND_BUILTIN_OPTS: OptionTable = OptionTable {
+    flags: &["-p"],
+    valued: &[],
+    bundles_short_options: true,
+};
+
+/// The bash *keyword* `time` only ever parses `-p` (POSIX output format);
+/// `-o`/`-v`/`-a`/`-f`/`--verbose`/... belong to the external GNU
+/// `/usr/bin/time`, a different program a bare `time` word doesn't
+/// necessarily name. Assuming them here would be guessing which `time`
+/// resolves (#199).
+fn resolve_time(words: &[&str], i: usize) -> Option<usize> {
+    let mut next = i + 1;
+    if words.get(next) == Some(&"-p") {
+        next += 1;
+    }
+    if words.get(next) == Some(&"--") {
+        next += 1;
+    }
+    match words.get(next) {
+        Some(word) if word.starts_with('-') => None,
+        _ => Some(next),
+    }
+}
+
+/// `-c`/`--call` embeds a whole shell command string rather than naming the
+/// program positionally — resolving past it would mean guessing at a
+/// program buried inside that string, so it's left unrecognised and
+/// resolution stops at `npx` (#199).
+const NPX_OPTS: OptionTable = OptionTable {
+    flags: &["-y", "--yes", "--no", "-q", "--quiet", "--ignore-existing"],
+    valued: &["-p", "--package", "--shell"],
+    bundles_short_options: false,
+};
+
+const PNPM_OPTS: OptionTable = OptionTable {
+    flags: &[
+        "--silent",
+        "-s",
+        "--stream",
+        "--aggregate-output",
+        "--no-progress",
+    ],
+    // `--package`/`--package=value` is documented in this pre-`dlx`
+    // position (`pnpm --package=x dlx y`), alongside the identical flag
+    // `dlx` itself also accepts (`PNPM_DLX_OPTS`).
+    valued: &["-C", "--dir", "--filter", "--package"],
+    bundles_short_options: false,
+};
+
+const YARN_OPTS: OptionTable = OptionTable {
+    flags: &["--silent", "-s", "--no-progress", "--non-interactive"],
+    valued: &["--cwd"],
+    bundles_short_options: false,
+};
+
+const PNPM_DLX_OPTS: OptionTable = OptionTable {
+    flags: &["-s", "--silent"],
+    valued: &["--package"],
+    bundles_short_options: false,
+};
+
+const YARN_DLX_OPTS: OptionTable = OptionTable {
+    flags: &["-q", "--quiet"],
+    valued: &["-p", "--package"],
+    bundles_short_options: false,
+};
+
+const BUN_X_OPTS: OptionTable = OptionTable {
+    flags: &["--bun", "--no-install", "--verbose", "--silent"],
+    valued: &["-p", "--package"],
+    bundles_short_options: false,
+};
+
+/// A resolver for one wrapper form: given the tokenized command and the
+/// index of the wrapper word itself, the index of the word after it (past
+/// its options and any subcommand it requires), or `None` if this occurrence
+/// isn't a form we resolve through.
+type WrapperResolver = fn(&[&str], usize) -> Option<usize>;
+
+/// One recognised wrapper form: how to walk past it, and whether an
+/// assignment word is a valid follow-on once it's been walked past.
+struct Wrapper {
+    resolve: WrapperResolver,
+    /// `true` only for wrappers that themselves interpret a following
+    /// `FOO=bar` as an environment assignment for the command they launch
+    /// (`env`, `sudo`), or a shell keyword that restarts the assignment-prefix
+    /// grammar for a brand new simple command (`time`). Every other wrapper
+    /// here is a plain executable that execs its next argument as the
+    /// program outright — an assignment-shaped one names a program literally
+    /// called `FOO=1`, not an env var (#199).
+    accepts_assignment: bool,
+}
+
+fn wrapper_resolver(name: &str) -> Option<Wrapper> {
+    let (resolve, accepts_assignment): (WrapperResolver, bool) = match name {
+        "env" => (|words, i| ENV_OPTS.consume(words, i + 1), true),
+        "sudo" => (|words, i| SUDO_OPTS.consume(words, i + 1), true),
+        "command" => (|words, i| COMMAND_BUILTIN_OPTS.consume(words, i + 1), false),
+        "nohup" => (|words, i| NO_OPTIONS.consume(words, i + 1), false),
+        "time" => (resolve_time, true),
+        "npx" => (|words, i| NPX_OPTS.consume(words, i + 1), false),
+        "pnpm" => (
+            |words, i| resolve_dlx(&PNPM_OPTS, &PNPM_DLX_OPTS, words, i),
+            false,
+        ),
+        "yarn" => (
+            |words, i| resolve_dlx(&YARN_OPTS, &YARN_DLX_OPTS, words, i),
+            false,
+        ),
+        "bun" => (resolve_bun, false),
+        "bunx" => (|words, i| BUN_X_OPTS.consume(words, i + 1), false),
+        "uvx" => (|_words, i| Some(i + 1), false),
+        _ => return None,
+    };
+    Some(Wrapper {
+        resolve,
+        accepts_assignment,
+    })
+}
+
+/// `pnpm`/`yarn` only look through to the package behind an explicit `dlx`
+/// — without it, the next word is a `package.json` script name, not a
+/// package to run (#199: `pnpm claude` is not `pnpm dlx claude`). `dlx`
+/// itself takes launcher-specific options too, consumed before the executable.
+fn resolve_dlx(
+    opts: &OptionTable,
+    dlx_opts: &OptionTable,
+    words: &[&str],
+    i: usize,
+) -> Option<usize> {
+    let j = opts.consume(words, i + 1)?;
+    if words.get(j) != Some(&"dlx") {
+        return None;
+    }
+    dlx_opts.consume(words, j + 1)
+}
+
+/// `bun x <pkg>` is bun's `dlx`/`npx` equivalent; `bun run <script>` is not
+/// (the same package-script ambiguity as bare `pnpm`/`yarn`), so only an `x`
+/// subcommand is looked through. `--bun` (`BUN_X_OPTS`) may follow it before
+/// the executable.
+fn resolve_bun(words: &[&str], i: usize) -> Option<usize> {
+    if words.get(i + 1) != Some(&"x") {
+        return None;
+    }
+    BUN_X_OPTS.consume(words, i + 2)
+}
+
+/// `FOO=bar`, the shell's own prefix for one command's environment —
+/// recognised only when the `=` came from plain, unquoted/unescaped source
+/// text (#199): `"FOO=1"` and `FOO\=1` name a program called `FOO=1`, not
+/// an assignment.
+fn is_env_assignment(word: &Word) -> bool {
+    let Some(eq) = word.plain_eq else {
+        return false;
+    };
+    let name = &word.text[..eq];
+    let mut chars = name.chars();
     match chars.next() {
         Some(c) if c.is_ascii_alphabetic() || c == '_' => {}
         _ => return false,
     }
-    let rest: String = chars.collect();
-    match rest.split_once('=') {
-        Some((name, _)) => name.chars().all(|c| c.is_ascii_alphanumeric() || c == '_'),
-        None => false,
-    }
+    chars.all(|c| c.is_ascii_alphanumeric() || c == '_')
 }
 
 fn basename(word: &str) -> &str {
@@ -497,38 +955,132 @@ mod tests {
             "claude"
         );
         assert_eq!(command_program("  zsh   -l  "), "zsh");
-        assert_eq!(command_program("hx src/main.rs"), "hx");
+    }
+
+    /// The #199 resolver contract: every case in the shared parity fixture,
+    /// asserted identically here and by `web/src/toolIcon.test.ts`, so a
+    /// resolver regression in either language fails its own suite.
+    #[test]
+    fn resolves_the_shared_command_resolution_fixture() {
+        #[derive(serde::Deserialize)]
+        struct Case {
+            command: String,
+            program: String,
+            tool: Option<String>,
+        }
+        #[derive(serde::Deserialize)]
+        struct Fixture {
+            cases: Vec<Case>,
+        }
+        let raw = include_str!("../../../fixtures/command-resolution.json");
+        let fixture: Fixture = serde_json::from_str(raw).expect("valid fixture JSON");
+        assert!(!fixture.cases.is_empty());
+        for case in &fixture.cases {
+            assert_eq!(
+                command_program(&case.command),
+                case.program,
+                "program for {:?}",
+                case.command
+            );
+            assert_eq!(
+                command_tool(&case.command),
+                case.tool.as_deref(),
+                "tool for {:?}",
+                case.command
+            );
+        }
+    }
+
+    fn word(text: &str) -> Word {
+        Word {
+            text: text.into(),
+            plain_eq: None,
+        }
+    }
+
+    /// Shell-aware tokenization (#199): quoting/escaping is honoured, never
+    /// evaluated — no `$var`/`` `cmd` ``/`$(cmd)` expansion is attempted.
+    #[test]
+    fn tokenize_handles_quotes_and_escapes_without_expanding_anything() {
+        assert_eq!(
+            tokenize("claude --resume"),
+            Some(vec![word("claude"), word("--resume")])
+        );
+        assert_eq!(
+            tokenize("\"/opt/my agent/claude\" --resume"),
+            Some(vec![word("/opt/my agent/claude"), word("--resume")])
+        );
+        assert_eq!(
+            tokenize("FOO=\"bar baz\" claude"),
+            Some(vec![
+                Word {
+                    text: "FOO=bar baz".into(),
+                    plain_eq: Some(3),
+                },
+                word("claude"),
+            ])
+        );
+        assert_eq!(
+            tokenize("claude --name=$HOME"),
+            Some(vec![
+                word("claude"),
+                Word {
+                    text: "--name=$HOME".into(),
+                    plain_eq: Some(6),
+                },
+            ]),
+            "a bare $ is kept literal, never expanded"
+        );
+    }
+
+    /// Real shell grammar this resolver doesn't attempt — pipelines, list
+    /// operators, subshells/substitution, an unescaped newline, an
+    /// unterminated quote — is rejected outright rather than guessed
+    /// through (#199).
+    #[test]
+    fn tokenize_rejects_ambiguous_shell_grammar() {
+        for command in [
+            "claude | tee log.txt",
+            "claude; echo done",
+            "claude && echo done",
+            "echo hi $(claude)",
+            "claude \"unterminated",
+            "claude 'unterminated",
+            "claude \\",
+            "claude\nclaude-code", // an unescaped newline separates commands, like `;`
+        ] {
+            assert_eq!(tokenize(command), None, "{command:?}");
+        }
+    }
+
+    /// A backslash immediately before a newline is a line continuation:
+    /// removed entirely, joining what it split rather than embedding a
+    /// literal newline or ending the command (#199).
+    #[test]
+    fn tokenize_treats_backslash_newline_as_a_continuation() {
+        assert_eq!(
+            tokenize("clau\\\nde --resume"),
+            Some(vec![word("claude"), word("--resume")])
+        );
+    }
+
+    /// Only a plain, unquoted/unescaped `=` marks an assignment boundary —
+    /// quoting or escaping the `=` itself disqualifies the word, even
+    /// though the dequoted text looks identical (#199).
+    #[test]
+    fn tokenize_only_marks_plain_unquoted_equals_signs_as_assignments() {
+        assert_eq!(tokenize("FOO=1 claude").unwrap()[0].plain_eq, Some(3));
+        assert_eq!(tokenize("\"FOO=1\" claude").unwrap()[0].plain_eq, None);
+        assert_eq!(tokenize("FOO\\=1 claude").unwrap()[0].plain_eq, None);
     }
 
     #[test]
-    fn command_program_looks_through_paths_env_and_wrappers() {
-        assert_eq!(command_program("/usr/local/bin/claude -p hi"), "claude");
-        assert_eq!(command_program("FOO=1 BAR=2 claude"), "claude");
-        assert_eq!(command_program("npx opencode"), "opencode");
-        assert_eq!(command_program("pnpm dlx opencode run"), "opencode");
-    }
-
-    #[test]
-    fn command_program_keeps_a_line_that_is_only_wrappers() {
-        assert_eq!(command_program("sudo"), "sudo");
-        assert_eq!(command_program(""), "");
-    }
-
-    /// The command bar's `tool` field (docs/COMMAND-BAR.md) names the same
-    /// tools the web's `splitCommand().tool` does.
-    #[test]
-    fn command_tool_names_the_mark_the_card_shows() {
-        assert_eq!(command_tool("claude --resume"), Some("claude"));
-        assert_eq!(command_tool("npx opencode"), Some("opencode"));
-        assert_eq!(command_tool("/bin/zsh -l"), Some("shell"));
-        assert_eq!(command_tool("CLAUDE"), Some("claude"));
-    }
-
-    /// Narrow on purpose: an unrecognised program has no mark, so the
-    /// candidate has no `tool` field to match rather than a wrong one.
-    #[test]
-    fn command_tool_is_absent_for_an_unrecognised_program() {
-        assert_eq!(command_tool("hx src/main.rs"), None);
-        assert_eq!(command_tool(""), None);
+    fn structured_view_support_follows_the_resolved_program() {
+        assert!(supports_structured_view("claude --resume"));
+        assert!(supports_structured_view("FOO=1 /usr/local/bin/codex exec"));
+        assert!(supports_structured_view("npx claude-code"));
+        assert!(!supports_structured_view("opencode"));
+        assert!(!supports_structured_view("bash -l"));
+        assert!(!supports_structured_view("claude-code-acp"));
     }
 }

crates/maestro-protocol/src/lib.rs

@@ -123,7 +123,7 @@ pub struct Session {
     /// daemon that predates the field keeps working untouched.
     #[serde(default)]
     pub view: SessionView,
-    /// The ACP session id the `claude-code-acp` adapter handed back from
+    /// The ACP session id the selected provider adapter handed back from
     /// `session/new` (#134). Only a [`SessionView::Structured`] session has
     /// one, and only once its handshake succeeded; a later respawn passes it
     /// to `session/load` so the conversation continues (#135). Distinct from
@@ -175,6 +175,10 @@ pub enum ActivityState {
     AwaitingInput,
     /// An agent reported a failure, or a structured session/turn failed.
     Error,
+    /// The ACP adapter is booting; the session is registered but cannot accept
+    /// prompts yet. Older clients that do not know this variant degrade it to
+    /// `Idle` via the lenient deserializer — acceptable.
+    Starting,
 }
 
 impl<'de> Deserialize<'de> for ActivityState {
@@ -187,6 +191,7 @@ impl<'de> Deserialize<'de> for ActivityState {
             "Active" => Self::Active,
             "AwaitingInput" => Self::AwaitingInput,
             "Error" => Self::Error,
+            "Starting" => Self::Starting,
             // Known or not, any other spelling degrades to the neutral default
             _ => Self::Idle,
         })
@@ -225,9 +230,10 @@ where
         "Idle" => Ok(ActivityState::Idle),
         "AwaitingInput" => Ok(ActivityState::AwaitingInput),
         "Error" => Ok(ActivityState::Error),
+        "Starting" => Ok(ActivityState::Starting),
         other => Err(D::Error::unknown_variant(
             other,
-            &["Active", "Idle", "AwaitingInput", "Error"],
+            &["Active", "Idle", "AwaitingInput", "Error", "Starting"],
         )),
     }
 }
@@ -383,6 +389,10 @@ pub struct CreateSessionRequest {
     /// untouched.
     #[serde(default)]
     pub view: SessionView,
+    /// When `true`, the daemon auto-approves every ACP permission request
+    /// for this structured session.
+    #[serde(default)]
+    pub auto_approve: bool,
 }
 
 /// Result of `GET /api/dirs`: the immediate subdirectories of one directory.
@@ -522,6 +532,11 @@ pub struct SpawnPreset {
     pub id: String,
     pub label: String,
     pub command: String,
+    /// When `true`, the daemon auto-approves every ACP permission request
+    /// for structured sessions spawned from this preset instead of surfacing
+    /// them to the client.
+    #[serde(default)]
+    pub auto_approve: bool,
 }
 
 /// Build provenance of the running daemon: the commit it was compiled
@@ -824,6 +839,15 @@ pub struct TurnState {
     pub thinking: bool,
     #[serde(default)]
     pub active_tool_calls: Vec<String>,
+    /// Wall-clock start of the active prompt. This lets reconnecting clients
+    /// keep one continuous elapsed-time display instead of restarting at zero.
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub started_at: Option<DateTime<Utc>>,
+    /// Context-window usage when the active prompt began. ACP exposes context
+    /// occupancy, not provider billing-token accounting, so clients must label
+    /// deltas as context tokens rather than tokens billed.
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub started_context_tokens: Option<u64>,
 }
 
 /// A whole-session view derived from ACP notifications.
@@ -846,6 +870,8 @@ pub struct ReducedState {
     pub model: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub mode: Option<String>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub config_options: Option<Value>,
 }
 
 /// Server messages sent over a structured-session WebSocket.
@@ -871,6 +897,13 @@ pub struct StructuredPromptRequest {
     pub prompt: String,
 }
 
+/// HTTP body for `POST /api/sessions/:id/structured/config`.
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
+pub struct StructuredConfigRequest {
+    pub config_id: String,
+    pub value: Value,
+}
+
 /// Operator decision for a pending ACP permission request.
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
 #[serde(rename_all = "snake_case")]
@@ -1233,6 +1266,7 @@ mod tests {
                 create_branch: true,
             }),
             view: SessionView::Terminal,
+            auto_approve: false,
         };
         assert_eq!(req, round_trip(&req));
     }

crates/maestro-protocol/src/routes.rs

@@ -86,11 +86,21 @@ pub fn structured_prompt(id: Uuid) -> String {
     format!("{SESSIONS}/{id}/structured/prompt")
 }
 
+/// `POST /api/sessions/:id/structured/attachments` — upload a file.
+pub fn structured_attachment(id: Uuid) -> String {
+    format!("{SESSIONS}/{id}/structured/attachments")
+}
+
 /// `POST /api/sessions/:id/structured/cancel` — cancel an ACP turn.
 pub fn structured_cancel(id: Uuid) -> String {
     format!("{SESSIONS}/{id}/structured/cancel")
 }
 
+/// `POST /api/sessions/:id/structured/config` — change an ACP session option.
+pub fn structured_config(id: Uuid) -> String {
+    format!("{SESSIONS}/{id}/structured/config")
+}
+
 /// `POST /api/sessions/:id/structured/approvals/:nonce` — answer ACP permission.
 pub fn structured_approval(id: Uuid, nonce: &str) -> String {
     format!("{SESSIONS}/{id}/structured/approvals/{nonce}")
@@ -108,7 +118,9 @@ pub mod patterns {
     pub const STRUCTURED: &str = "/api/structured/:id";
     pub const STRUCTURED_REPLAY: &str = "/api/sessions/:id/structured/replay";
     pub const STRUCTURED_PROMPT: &str = "/api/sessions/:id/structured/prompt";
+    pub const STRUCTURED_ATTACHMENT: &str = "/api/sessions/:id/structured/attachments";
     pub const STRUCTURED_CANCEL: &str = "/api/sessions/:id/structured/cancel";
+    pub const STRUCTURED_CONFIG: &str = "/api/sessions/:id/structured/config";
     pub const STRUCTURED_APPROVAL: &str = "/api/sessions/:id/structured/approvals/:nonce";
 }
 

crates/maestro-testing/src/lib.rs

@@ -22,7 +22,8 @@ use chrono::Utc;
 use futures_util::{SinkExt, StreamExt};
 use maestro_protocol::{
     routes, ApiError, CatalogEvent, CreateSessionRequest, DaemonClient, DaemonInfo, DirListing,
-    GitRoot, RecentDirs, SendInputRequest, Session, SessionStatus, PROTOCOL_VERSION,
+    GitRoot, RecentDirs, SendInputRequest, Session, SessionStatus, StructuredPromptRequest,
+    PROTOCOL_VERSION,
 };
 use tokio::net::TcpListener;
 use tokio::sync::{broadcast, oneshot};
@@ -60,6 +61,8 @@ struct Inner {
     forced_error: Option<(u16, ApiError)>,
     /// Everything `POST /api/sessions/:id/input` was asked to type, in order.
     inputs: Vec<(Uuid, SendInputRequest)>,
+    /// Every ACP prompt sent to a structured session, in order.
+    structured_prompts: Vec<(Uuid, StructuredPromptRequest)>,
 }
 
 #[derive(Clone)]
@@ -92,6 +95,7 @@ impl MockDaemon {
             .route(routes::SESSIONS, get(list_sessions).post(create_session))
             .route(routes::patterns::SESSION, delete(kill_session))
             .route(routes::patterns::SESSION_INPUT, post(send_input))
+            .route(routes::patterns::STRUCTURED_PROMPT, post(structured_prompt))
             .route(routes::INFO, get(daemon_info))
             .route(routes::DIRS, get(list_dir))
             .route(routes::RECENT_DIRS, get(recent_dirs))
@@ -178,6 +182,16 @@ impl MockDaemon {
         self.state.inner.lock().expect("poisoned").inputs.clone()
     }
 
+    /// Every ACP prompt this daemon received, oldest first.
+    pub fn structured_prompts(&self) -> Vec<(Uuid, StructuredPromptRequest)> {
+        self.state
+            .inner
+            .lock()
+            .expect("poisoned")
+            .structured_prompts
+            .clone()
+    }
+
     pub fn session_count(&self) -> usize {
         self.state.inner.lock().expect("poisoned").sessions.len()
     }
@@ -266,6 +280,26 @@ async fn send_input(
     StatusCode::NO_CONTENT.into_response()
 }
 
+async fn structured_prompt(
+    State(s): State<AppState>,
+    Path(id): Path<Uuid>,
+    Json(req): Json<StructuredPromptRequest>,
+) -> Response {
+    if let Some(r) = forced(&s) {
+        return r;
+    }
+    let mut guard = s.inner.lock().expect("poisoned");
+    if !guard.sessions.iter().any(|x| x.id == id) {
+        return (
+            StatusCode::NOT_FOUND,
+            Json(ApiError::new("not_found", "no such session on this daemon")),
+        )
+            .into_response();
+    }
+    guard.structured_prompts.push((id, req));
+    StatusCode::NO_CONTENT.into_response()
+}
+
 async fn daemon_info(State(s): State<AppState>) -> Response {
     if let Some(r) = forced(&s) {
         return r;

crates/maestro-tui/src/app.rs

@@ -11,6 +11,7 @@
 //! `dispatch` / the overlay routing.
 
 use std::collections::{HashMap, HashSet};
+use std::io::Write;
 use std::path::PathBuf;
 use std::time::Duration;
 
@@ -54,6 +55,36 @@ enum OverlayDecision {
     Pass,
 }
 
+fn copy_to_terminal_clipboard(text: &str) -> std::io::Result<()> {
+    let encoded = base64_encode(text.as_bytes());
+    let mut output = std::io::stdout();
+    write!(output, "\x1b]52;c;{encoded}\x07")?;
+    output.flush()
+}
+
+fn base64_encode(bytes: &[u8]) -> String {
+    const TABLE: &[u8; 64] = b"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+    let mut output = String::with_capacity(bytes.len().div_ceil(3) * 4);
+    for chunk in bytes.chunks(3) {
+        let bits = (u32::from(chunk[0]) << 16)
+            | (u32::from(*chunk.get(1).unwrap_or(&0)) << 8)
+            | u32::from(*chunk.get(2).unwrap_or(&0));
+        output.push(TABLE[((bits >> 18) & 0x3f) as usize] as char);
+        output.push(TABLE[((bits >> 12) & 0x3f) as usize] as char);
+        output.push(if chunk.len() > 1 {
+            TABLE[((bits >> 6) & 0x3f) as usize] as char
+        } else {
+            '='
+        });
+        output.push(if chunk.len() > 2 {
+            TABLE[(bits & 0x3f) as usize] as char
+        } else {
+            '='
+        });
+    }
+    output
+}
+
 pub struct App {
     cfg: TuiConfig,
     home_dir: String,
@@ -340,6 +371,10 @@ impl App {
             return Ok(false);
         }
 
+        if self.handle_structured_mouse(&key) {
+            return Ok(false);
+        }
+
         if let Some(effects) = self.handle_structured_key(&key) {
             self.perform(effects).await;
             return Ok(false);
@@ -423,6 +458,61 @@ impl App {
         true
     }
 
+    /// Transcript blocks are pointer targets: click selects the whole block,
+    /// gives it the selection surface, and copies its complete text.
+    fn handle_structured_mouse(&mut self, key: &InputKey) -> bool {
+        let InputKey::Mouse {
+            kind,
+            region: Region::Pane,
+            row,
+            ..
+        } = key
+        else {
+            return false;
+        };
+        if !matches!(kind, MouseKind::Click | MouseKind::Hover) {
+            return false;
+        }
+        let Some(sid) = self.state.active_session() else {
+            return false;
+        };
+        let Some(handle) = self.structured.get(&sid) else {
+            return false;
+        };
+        let Some(pane) = self.region.pane else {
+            return false;
+        };
+        let offset = usize::from(row.saturating_sub(pane.y));
+        let transcript_height = pane.height.saturating_sub(pane.height.min(3));
+        if offset >= usize::from(transcript_height) {
+            return true;
+        }
+        let mut state = handle.state.lock().expect("structured state mutex");
+        let rendered_line = state.scroll.saturating_add(offset);
+        if !state.select_rendered_line(rendered_line) {
+            return true;
+        }
+        let Some(id) = state.selected.as_deref() else {
+            return true;
+        };
+        let Some(transcript) = state.rows.iter().find(|item| item.id == id) else {
+            return true;
+        };
+        if *kind == MouseKind::Hover {
+            return true;
+        }
+        let text = crate::structured_pane::copy_text(transcript);
+        drop(state);
+        if text.is_empty() {
+            return true;
+        }
+        match copy_to_terminal_clipboard(&text) {
+            Ok(()) => self.state.toast("copied transcript block"),
+            Err(error) => self.state.toast(format!("copy failed: {error}")),
+        }
+        true
+    }
+
     /// Carry out what `dispatch` decided. The only place in `App` that talks to
     /// the daemon.
     async fn perform(&mut self, effects: Vec<Effect>) {
@@ -1905,6 +1995,12 @@ async fn fetch_branches(
 #[cfg(test)]
 mod tests {
     use super::*;
+
+    #[test]
+    fn clipboard_payload_uses_standard_base64() {
+        assert_eq!(base64_encode(b"hello"), "aGVsbG8=");
+        assert_eq!(base64_encode("✓".as_bytes()), "4pyT");
+    }
     use crate::action::Action;
     use crate::draft::DraftField;
     use crate::keymap::Mode;
@@ -3009,6 +3105,7 @@ mod tests {
             env: Default::default(),
             metadata: Default::default(),
             worktree: None,
+            auto_approve: false,
         };
         app.submit_spawn(req).await;
 
@@ -3053,17 +3150,20 @@ mod tests {
         let request = |view| CreateSessionRequest {
             view,
             cwd: std::path::PathBuf::from("/srv/work"),
-            command: "claude".into(),
+            command: "codex".into(),
             env: Default::default(),
             metadata: Default::default(),
             worktree: None,
+            auto_approve: false,
         };
 
         let structured_id = Uuid::from_u128(188);
+        app.state.mode = Mode::Insert;
         app.submit_spawn(request(SessionView::Structured)).await;
         assert!(app.catalog.snapshot().sessions.is_empty());
         assert!(app.structured.contains_key(&structured_id));
         assert!(app.emulators.get(structured_id).is_none());
+        assert_eq!(app.state.mode, Mode::Normal);
 
         let terminal_id = Uuid::from_u128(187);
         app.submit_spawn(request(SessionView::Terminal)).await;

crates/maestro-tui/src/draft.rs

@@ -41,8 +41,10 @@ use std::time::{Duration, Instant};
 
 use chrono::{DateTime, Utc};
 use maestro_config::{builtin_presets, custom_preset};
-use maestro_protocol::display::abbreviate_dir;
-use maestro_protocol::{BranchInfo, CreateSessionRequest, Project, SpawnPreset, WorktreeSpec};
+use maestro_protocol::display::{abbreviate_dir, supports_structured_view};
+use maestro_protocol::{
+    BranchInfo, CreateSessionRequest, Project, SessionView, SpawnPreset, WorktreeSpec,
+};
 use ratatui::layout::{Constraint, Layout, Rect};
 use ratatui::style::{Modifier, Style};
 use ratatui::text::{Line, Span};
@@ -86,9 +88,11 @@ pub enum DraftField {
     /// apply immediately, mirroring the web form's per-click choice.
     WorktreeChoice,
     Name,
-    /// Disclosure collapsing the worktree/branch controls below (#93).
+    /// Disclosure collapsing the optional view and worktree controls below.
     /// Closed by default; Enter / Space toggles.
     Advanced,
+    /// ACP-backed transcript instead of a terminal. Claude Code or Codex.
+    StructuredToggle,
     /// Worktree on/off for this session (#65). Enter / Space toggles.
     WorktreeToggle,
     /// New-vs-existing branch source; Left / Right switches.
@@ -251,6 +255,14 @@ pub struct DraftPane {
     /// "Advanced options" disclosure (#93). Closed by default — most spawns
     /// take the default target.
     pub advanced_collapsed: bool,
+    /// ACP-backed structured transcript. Supported only when the resolved
+    /// command is Claude Code or Codex, and on by default whenever it is —
+    /// until the operator works the toggle themselves.
+    pub structured_view: bool,
+    /// Set once the operator toggles structured view by hand. From then on a
+    /// command change never re-enables what they turned off, the same guard
+    /// `name_touched` gives the name field.
+    pub structured_view_touched: bool,
     /// Enclosing repository of the chosen target — from the project scan for
     /// picked rows, `/api/gitroot` for raw paths. `None` until known.
     pub base_repo: Option<PathBuf>,
@@ -291,7 +303,7 @@ impl Default for DraftPane {
         // while its data loads, and stay usable when the daemon reports none.
         let mut presets = builtin_presets();
         presets.push(custom_preset());
-        Self {
+        let mut draft = Self {
             id: NEXT_DRAFT_ID.fetch_add(1, std::sync::atomic::Ordering::Relaxed),
             presets,
             selected_preset: 0,
@@ -311,6 +323,8 @@ impl Default for DraftPane {
             name_touched: false,
             worktree_enabled: true,
             advanced_collapsed: true,
+            structured_view: false,
+            structured_view_touched: false,
             base_repo: None,
             probed_cwd: None,
             probe_seq: 0,
@@ -329,7 +343,11 @@ impl Default for DraftPane {
             // straight away, and Tab from here reaches the command tiles.
             focused_field: DraftField::DirPicker,
             home_dir: String::new(),
-        }
+        };
+        // The built-in tile the form opens on decides whether structured view
+        // starts ticked, exactly as a later preset list would.
+        draft.sync_structured_view();
+        draft
     }
 }
 
@@ -348,6 +366,7 @@ impl DraftPane {
             .position(|p| !p.command.is_empty())
             .unwrap_or(0);
         self.apply_seed_command();
+        self.sync_structured_view();
     }
 
     /// Land a seeded command on the tile that runs it: its own preset when the
@@ -663,6 +682,28 @@ impl DraftPane {
         }
     }
 
+    fn supports_structured_view(&self) -> bool {
+        supports_structured_view(self.command())
+    }
+
+    /// Re-resolve the toggle after the command changed: an unsupported
+    /// command forces it off, a supported one turns it back on unless the
+    /// operator has already made the choice themselves.
+    fn sync_structured_view(&mut self) {
+        if !self.supports_structured_view() {
+            self.structured_view = false;
+        } else if !self.structured_view_touched {
+            self.structured_view = true;
+        }
+    }
+
+    pub fn toggle_structured_view(&mut self) {
+        if self.supports_structured_view() {
+            self.structured_view = !self.structured_view;
+            self.structured_view_touched = true;
+        }
+    }
+
     /// The chosen working directory: a picked project row, else the raw path
     /// input when it holds something.
     pub fn cwd(&self) -> Option<PathBuf> {
@@ -693,13 +734,22 @@ impl DraftPane {
             );
         }
         let worktree = self.build_worktree()?;
+        let auto_approve = self
+            .presets
+            .get(self.selected_preset)
+            .is_some_and(|p| p.auto_approve);
         Ok(CreateSessionRequest {
-            view: Default::default(),
+            view: if self.structured_view && self.supports_structured_view() {
+                SessionView::Structured
+            } else {
+                SessionView::Terminal
+            },
             cwd,
             command: command.to_string(),
             env: Default::default(),
             metadata,
             worktree,
+            auto_approve,
         })
     }
 
@@ -754,6 +804,9 @@ impl DraftPane {
         order.push(DraftField::Name);
         order.push(DraftField::Advanced);
         if !self.advanced_collapsed {
+            if self.supports_structured_view() {
+                order.push(DraftField::StructuredToggle);
+            }
             if !self.cwd_raw_visible && self.selected_group_key.is_some() {
                 order.push(DraftField::WorktreeChoice);
             }
@@ -795,6 +848,7 @@ impl DraftPane {
         }
         self.selected_preset =
             ((self.selected_preset as i32) + delta).rem_euclid(len as i32) as usize;
+        self.sync_structured_view();
     }
 
     /// Step-one boxes surviving the type-to-filter, in display order. A
@@ -1001,9 +1055,9 @@ impl DraftPane {
             // Two fields keep their own Enter instead: `DirPicker`, whose
             // highlighted row isn't the picked one until a first Enter chooses
             // it (the next Enter, now that it's active, falls through to
-            // submit); and the disclosure/toggle pair (`Advanced`,
-            // `WorktreeToggle`), which activate on Enter like a button rather
-            // than submitting, same as the web form's own `<button>` controls.
+            // submit); and the disclosure/checkbox fields, which activate on
+            // Enter like buttons rather than submitting, matching the web
+            // form controls.
             InputKey::Enter if self.focused_field == DraftField::DirPicker => {
                 let is_other_row = self.selection() >= self.visible_groups().len();
                 let choose_only =
@@ -1023,6 +1077,10 @@ impl DraftPane {
                 self.toggle_worktree();
                 DraftInputResult::Consumed
             }
+            InputKey::Enter if self.focused_field == DraftField::StructuredToggle => {
+                self.toggle_structured_view();
+                DraftInputResult::Consumed
+            }
             InputKey::Enter => DraftInputResult::Submit,
             InputKey::Char {
                 c: ' ',
@@ -1040,6 +1098,14 @@ impl DraftPane {
                 self.toggle_worktree();
                 DraftInputResult::Consumed
             }
+            InputKey::Char {
+                c: ' ',
+                ctrl: false,
+                ..
+            } if self.focused_field == DraftField::StructuredToggle => {
+                self.toggle_structured_view();
+                DraftInputResult::Consumed
+            }
             InputKey::Up if self.focused_field == DraftField::DirPicker => {
                 self.move_selection(-1);
                 DraftInputResult::Consumed
@@ -1083,7 +1149,10 @@ impl DraftPane {
             other => {
                 match self.focused_field {
                     DraftField::Preset | DraftField::Submit => {}
-                    DraftField::CustomCommand => self.custom_command.handle_key(other),
+                    DraftField::CustomCommand => {
+                        self.custom_command.handle_key(other);
+                        self.sync_structured_view();
+                    }
                     // Typing filters the list; the highlight resets to the top
                     // so a narrowed search always starts at its best match.
                     DraftField::DirPicker => {
@@ -1121,9 +1190,9 @@ impl DraftPane {
 
         let show_custom = self.is_custom();
         let show_raw = self.cwd_raw_visible;
-        // The worktree choice step, the worktree toggle and its body all stay
-        // behind the "Advanced options" disclosure (#93): collapsed hides
-        // them, regardless of what they'd otherwise show.
+        let show_structured = !self.advanced_collapsed && self.supports_structured_view();
+        // Optional view and worktree controls stay behind the "Advanced
+        // options" disclosure (#93), regardless of what they'd otherwise show.
         let show_wt_toggle = !self.advanced_collapsed;
         let show_wt_body = show_wt_toggle && self.worktree_body_visible();
         let show_wt_choice =
@@ -1142,6 +1211,7 @@ impl DraftPane {
         let fixed: u16 = 3 /* tiles + dir + name */ + 1 /* advanced header */ + 1 /* spawn */
             + u16::from(show_custom)
             + u16::from(show_raw)
+            + u16::from(show_structured)
             + u16::from(show_wt_toggle)
             + u16::from(show_wt_choice) * wt_choice_capacity
             + u16::from(show_wt_body) * (1 + if self.branch_mode == WorktreeBranchMode::New { 1 } else { branch_rows })
@@ -1161,6 +1231,9 @@ impl DraftPane {
         }
         constraints.push(Constraint::Length(1)); // name
         constraints.push(Constraint::Length(1)); // advanced header
+        if show_structured {
+            constraints.push(Constraint::Length(1));
+        }
         if show_wt_choice {
             constraints.push(Constraint::Length(wt_choice_capacity));
         }
@@ -1359,6 +1432,24 @@ impl DraftPane {
             advanced_row,
         );
 
+        if show_structured {
+            let row = next_row();
+            f.render_widget(
+                Paragraph::new(Line::from(vec![
+                    Span::raw(format!("{:<GUTTER$}", "view:")),
+                    Span::styled(
+                        if self.structured_view {
+                            "[x] structured view"
+                        } else {
+                            "[ ] structured view"
+                        },
+                        field_style(DraftField::StructuredToggle),
+                    ),
+                ])),
+                row,
+            );
+        }
+
         if show_wt_choice {
             // Step two (#96 rule 3): "+ new" first, then the repository's
             // worktrees newest-first.
@@ -1706,6 +1797,7 @@ mod tests {
             id: "aider".into(),
             label: "Aider".into(),
             command: "aider".into(),
+            auto_approve: false,
         }]);
         assert_eq!(
             draft.command(),
@@ -1728,11 +1820,13 @@ mod tests {
                 id: "claude".into(),
                 label: "Claude".into(),
                 command: "claude".into(),
+                auto_approve: false,
             },
             SpawnPreset {
                 id: "aider".into(),
                 label: "Aider".into(),
                 command: "aider".into(),
+                auto_approve: false,
             },
         ]);
         assert_eq!(draft.command(), "aider");
@@ -1752,6 +1846,7 @@ mod tests {
             id: "claude".into(),
             label: "Claude".into(),
             command: "claude".into(),
+            auto_approve: false,
         }]);
         assert!(draft.is_custom());
         assert_eq!(draft.command(), "bash -l");
@@ -1817,6 +1912,280 @@ mod tests {
         assert_eq!(req.cwd, PathBuf::from("/srv/work"));
     }
 
+    #[test]
+    fn structured_view_is_default_on_and_visible_for_supported_agents() {
+        let mut draft = DraftPane {
+            advanced_collapsed: false,
+            ..DraftPane::default()
+        };
+        draft.set_presets(vec![
+            SpawnPreset {
+                id: "claude".into(),
+                label: "Claude".into(),
+                command: "claude".into(),
+                auto_approve: false,
+            },
+            SpawnPreset {
+                id: "codex".into(),
+                label: "Codex".into(),
+                command: "codex".into(),
+                auto_approve: false,
+            },
+            SpawnPreset {
+                id: "opencode".into(),
+                label: "OpenCode".into(),
+                command: "opencode".into(),
+                auto_approve: false,
+            },
+        ]);
+        assert!(draft.structured_view, "on by default for a supported agent");
+        assert!(draft.field_order().contains(&DraftField::StructuredToggle));
+        let rendered = render_to_string(100, 24, |f| draft.render(f, f.area(), true));
+        assert!(rendered.contains("[x] structured view"), "{rendered}");
+
+        draft.cycle_preset(1);
+        assert_eq!(draft.command(), "codex");
+        assert!(
+            draft.structured_view,
+            "Codex keeps the structured selection"
+        );
+        draft.cycle_preset(1);
+        assert_eq!(draft.command(), "opencode");
+        assert!(
+            !draft.structured_view,
+            "a hidden value must not stay checked"
+        );
+        assert!(!draft.field_order().contains(&DraftField::StructuredToggle));
+        let rendered = render_to_string(100, 24, |f| draft.render(f, f.area(), true));
+        assert!(!rendered.contains("structured view"), "{rendered}");
+    }
+
+    #[test]
+    fn structured_view_request_is_guarded_against_a_stale_command() {
+        let mut draft = DraftPane {
+            picked_cwd: Some(PathBuf::from("/srv/work")),
+            worktree_enabled: false,
+            structured_view: true,
+            ..DraftPane::default()
+        };
+        assert_eq!(draft.build_request().unwrap().view, SessionView::Structured);
+
+        draft.selected_preset = 1;
+        assert_eq!(draft.command(), "opencode");
+        assert_eq!(draft.build_request().unwrap().view, SessionView::Terminal);
+    }
+
+    /// A custom command typed into the free-text field, run through the same
+    /// resolver the daemon/web gate uses (`command_tool`, #199): a path, an
+    /// env prefix, or a wrapper still resolves to Claude Code or Codex, so
+    /// the toggle stays offered and the request carries `Structured`; an
+    /// unrelated program does not.
+    #[test]
+    fn structured_view_follows_command_resolution_for_custom_commands() {
+        let cases: &[(&str, bool)] = &[
+            ("claude", true),
+            ("claude --resume", true),
+            ("CLAUDE", true),
+            ("/usr/local/bin/claude -p hi", true),
+            ("./bin/claude", true),
+            ("FOO=1 BAR=2 claude", true),
+            ("npx claude-code", true),
+            ("npx --yes claude-code", true),
+            ("sudo claude", true),
+            ("sudo -u root claude", true),
+            ("env -i claude", true),
+            ("nohup claude", true),
+            ("time claude", true),
+            ("command claude", true),
+            ("pnpm --silent dlx claude-code", true),
+            ("yarn --silent dlx claude-code", true),
+            ("bun x claude-code", true),
+            ("\"/opt/my agent/claude\" --resume", true),
+            ("codex", true),
+            ("codex --full-auto", true),
+            ("CODEX=1 codex", true),
+            ("/usr/local/bin/codex exec", true),
+            ("npx codex", true),
+            ("sudo -u root codex", true),
+            ("env -i codex", true),
+            ("command codex", true),
+            ("pnpm --silent dlx codex", true),
+            ("\"/opt/my agent/codex\" exec", true),
+            ("bash", false),
+            ("opencode", false),
+            ("/usr/local/bin/bash -l", false),
+            // A package-manager wrapper without `dlx`/`x` runs a
+            // `package.json` script, not the package (#199) — must not be
+            // mistaken for a Claude launch.
+            ("pnpm claude", false),
+            ("yarn claude", false),
+            // The daemon's structured-session child, never a valid
+            // user-facing launch form (#199).
+            ("claude-code-acp", false),
+        ];
+        for &(command, supported) in cases {
+            let mut draft = DraftPane {
+                picked_cwd: Some(PathBuf::from("/srv/work")),
+                worktree_enabled: false,
+                advanced_collapsed: false,
+                ..DraftPane::default()
+            };
+            draft.selected_preset = draft.presets.len() - 1;
+            draft.custom_command = crate::text_input::TextInput::with_value(command);
+            draft.sync_structured_view();
+
+            assert_eq!(
+                draft.field_order().contains(&DraftField::StructuredToggle),
+                supported,
+                "toggle visibility for {command:?}"
+            );
+            assert_eq!(
+                draft.structured_view, supported,
+                "default selection for {command:?}"
+            );
+            let view = draft.build_request().unwrap().view;
+            assert_eq!(
+                view,
+                if supported {
+                    SessionView::Structured
+                } else {
+                    SessionView::Terminal
+                },
+                "request view for {command:?}"
+            );
+
+            draft.toggle_structured_view();
+            assert!(
+                !draft.structured_view,
+                "the toggle turns the default off for {command:?}"
+            );
+        }
+    }
+
+    /// A configured preset (the spawn-form "alias" for a command) is gated
+    /// the same way as free text: a preset whose command resolves to Claude
+    /// Code or Codex through a wrapper still offers structured view.
+    #[test]
+    fn structured_view_follows_command_resolution_for_presets() {
+        let mut draft = DraftPane {
+            picked_cwd: Some(PathBuf::from("/srv/work")),
+            worktree_enabled: false,
+            advanced_collapsed: false,
+            ..DraftPane::default()
+        };
+        draft.set_presets(vec![
+            SpawnPreset {
+                id: "claude-wrapped".into(),
+                label: "Claude (npx)".into(),
+                command: "npx claude-code --resume".into(),
+                auto_approve: false,
+            },
+            SpawnPreset {
+                id: "codex-wrapped".into(),
+                label: "Codex (npx)".into(),
+                command: "npx codex exec".into(),
+                auto_approve: false,
+            },
+            SpawnPreset {
+                id: "aider".into(),
+                label: "Aider".into(),
+                command: "aider".into(),
+                auto_approve: false,
+            },
+        ]);
+
+        assert_eq!(draft.command(), "npx claude-code --resume");
+        assert!(draft.field_order().contains(&DraftField::StructuredToggle));
+        assert!(draft.structured_view);
+        assert_eq!(draft.build_request().unwrap().view, SessionView::Structured);
+
+        // Switching between supported presets preserves the selection.
+        draft.cycle_preset(1);
+        assert_eq!(draft.command(), "npx codex exec");
+        assert!(draft.structured_view);
+        assert_eq!(draft.build_request().unwrap().view, SessionView::Structured);
+
+        // Switching to a preset that does not resolve to an ACP agent clears the
+        // stale selection instead of letting an invalid request through.
+        draft.cycle_preset(1);
+        assert_eq!(draft.command(), "aider");
+        assert!(!draft.structured_view, "stale selection must clear");
+        assert!(!draft.field_order().contains(&DraftField::StructuredToggle));
+        assert_eq!(draft.build_request().unwrap().view, SessionView::Terminal);
+    }
+
+    /// The default only applies until the operator has an opinion: once they
+    /// untick the box, moving between supported commands leaves it unticked
+    /// instead of turning it back on under them.
+    #[test]
+    fn an_unticked_structured_view_survives_a_command_change() {
+        let mut draft = DraftPane {
+            picked_cwd: Some(PathBuf::from("/srv/work")),
+            worktree_enabled: false,
+            advanced_collapsed: false,
+            ..DraftPane::default()
+        };
+        draft.set_presets(vec![
+            SpawnPreset {
+                id: "claude".into(),
+                label: "Claude".into(),
+                command: "claude".into(),
+                auto_approve: false,
+            },
+            SpawnPreset {
+                id: "codex".into(),
+                label: "Codex".into(),
+                command: "codex".into(),
+                auto_approve: false,
+            },
+        ]);
+        assert!(draft.structured_view);
+
+        draft.toggle_structured_view();
+        assert!(!draft.structured_view);
+
+        draft.cycle_preset(1);
+        assert_eq!(draft.command(), "codex");
+        assert!(
+            !draft.structured_view,
+            "the operator's choice outranks the default"
+        );
+        assert_eq!(draft.build_request().unwrap().view, SessionView::Terminal);
+    }
+
+    /// Editing the custom-command text away from a supported agent clears an armed
+    /// selection immediately, matching the preset-switch case above — an
+    /// invalid `Structured` request can never reach `build_request`.
+    #[test]
+    fn structured_view_clears_when_custom_command_edited_away_from_supported_agent() {
+        let mut draft = DraftPane {
+            picked_cwd: Some(PathBuf::from("/srv/work")),
+            worktree_enabled: false,
+            advanced_collapsed: false,
+            focused_field: DraftField::CustomCommand,
+            ..DraftPane::default()
+        };
+        draft.selected_preset = draft.presets.len() - 1;
+        draft.custom_command = crate::text_input::TextInput::with_value("codex");
+        draft.sync_structured_view();
+        assert!(draft.structured_view);
+
+        typed(&mut draft, " -p");
+        assert_eq!(draft.command(), "codex -p");
+        assert!(draft.structured_view, "still Codex, selection survives");
+
+        for _ in 0.."codex -p".chars().count() {
+            draft.on_input(&InputKey::Backspace);
+        }
+        typed(&mut draft, "bash");
+        assert_eq!(draft.command(), "bash");
+        assert!(
+            !draft.structured_view,
+            "editing the program away from Codex clears the stale selection"
+        );
+        assert_eq!(draft.build_request().unwrap().view, SessionView::Terminal);
+    }
+
     #[test]
     fn projects_render_sorted_with_stale_dimmed_and_other_directory_last() {
         let mut draft = DraftPane {

crates/maestro-tui/src/fast_forward.rs

@@ -121,6 +121,7 @@ impl FastForwardDefaults {
                 branch: handle.to_string(),
                 create_branch: true,
             }),
+            auto_approve: false,
         })
     }
 
@@ -184,6 +185,7 @@ mod tests {
             id: id.into(),
             label: id.into(),
             command: command.into(),
+            auto_approve: false,
         }
     }
 

crates/maestro-tui/src/input.rs

@@ -55,6 +55,7 @@ pub enum MouseKind {
     Click,
     DblClick,
     Drag,
+    Hover,
     ScrollUp,
     ScrollDown,
 }
@@ -148,6 +149,7 @@ impl InputKey {
                     MouseKind::Click => "click",
                     MouseKind::DblClick => "dblclick",
                     MouseKind::Drag => "drag",
+                    MouseKind::Hover => "hover",
                     MouseKind::ScrollUp => "scrollup",
                     MouseKind::ScrollDown => "scrolldown",
                 };
@@ -178,6 +180,7 @@ impl InputKey {
                 "click" => MouseKind::Click,
                 "dblclick" => MouseKind::DblClick,
                 "drag" => MouseKind::Drag,
+                "hover" => MouseKind::Hover,
                 "scrollup" => MouseKind::ScrollUp,
                 "scrolldown" => MouseKind::ScrollDown,
                 other => return Err(InputParseError::UnknownMouseKind(other.into())),
@@ -297,6 +300,7 @@ where
             let mk = match kind {
                 MouseEventKind::Down(MouseButton::Left) => MouseKind::Click,
                 MouseEventKind::Drag(MouseButton::Left) => MouseKind::Drag,
+                MouseEventKind::Moved => MouseKind::Hover,
                 MouseEventKind::ScrollUp => MouseKind::ScrollUp,
                 MouseEventKind::ScrollDown => MouseKind::ScrollDown,
                 _ => return None,
@@ -681,6 +685,9 @@ mod tests {
         let s = "mouse:dblclick(sidebar-row)";
         let k = InputKey::parse(s).unwrap();
         assert_eq!(k.canonical(), s);
+        let s = "mouse:hover(pane)";
+        let k = InputKey::parse(s).unwrap();
+        assert_eq!(k.canonical(), s);
     }
 
     #[test]

crates/maestro-tui/src/palette.rs

@@ -82,7 +82,7 @@ impl Surface {
     pub fn activity(&self, state: ActivityState) -> Color {
         match state {
             ActivityState::Active => self.active,
-            ActivityState::Idle => self.idle,
+            ActivityState::Idle | ActivityState::Starting => self.idle,
             ActivityState::AwaitingInput => self.awaiting,
             ActivityState::Error => self.error,
         }
@@ -928,9 +928,10 @@ pub fn contrast_ratio(a: Color, b: Color) -> Option<f64> {
 mod tests {
     use super::*;
 
-    const STATES: [ActivityState; 4] = [
+    const STATES: [ActivityState; 5] = [
         ActivityState::Active,
         ActivityState::Idle,
+        ActivityState::Starting,
         ActivityState::AwaitingInput,
         ActivityState::Error,
     ];

crates/maestro-tui/src/sidebar.rs

@@ -979,6 +979,7 @@ mod tests {
         for state in [
             ActivityState::Active,
             ActivityState::Idle,
+            ActivityState::Starting,
             ActivityState::AwaitingInput,
             ActivityState::Error,
         ] {
@@ -1009,6 +1010,7 @@ mod tests {
         for state in [
             ActivityState::Active,
             ActivityState::Idle,
+            ActivityState::Starting,
             ActivityState::AwaitingInput,
             ActivityState::Error,
         ] {

crates/maestro-tui/src/structured_pane.rs

@@ -90,6 +90,7 @@ impl StructuredPane {
 
         let viewport = usize::from(area.height);
         let max_scroll = lines.len().saturating_sub(viewport);
+        state.scroll = reconcile_scroll(&state.scroll, &state.line_rows, &lines);
         if state.follow_selection {
             if let Some(selected) = state.selected.as_deref() {
                 let first = lines
@@ -138,6 +139,7 @@ impl StructuredPane {
                 Rect::new(area.x, area.y + offset as u16, area.width, 1),
             );
         }
+        state.line_rows = lines.iter().map(|line| line.row_id.clone()).collect();
     }
 
     fn render_projection_status(&self, f: &mut Frame, area: Rect, state: &StructuredState) {
@@ -214,13 +216,104 @@ fn error_line(text: &str) -> VisualLine {
     }
 }
 
+/// Translate `scroll` — a raw line index into `old_rows` (the previous
+/// render's row-per-line layout) — into the equivalent index into `lines`
+/// (this render's freshly rebuilt layout), anchored on row identity rather
+/// than raw position. A row's wrapped lines above or intersecting the
+/// viewport growing, shrinking, or moving index therefore shifts `scroll`
+/// along with it instead of leaving the viewport looking at different
+/// content. Falls back to the nearest surviving neighbour row when the
+/// anchor row itself is gone, and to the raw index (clamped) when nothing
+/// nearby survived either.
+fn reconcile_scroll(scroll: &usize, old_rows: &[Option<String>], lines: &[VisualLine]) -> usize {
+    if old_rows.is_empty() {
+        return *scroll;
+    }
+    let old_index = (*scroll).min(old_rows.len() - 1);
+    let anchor = old_rows[old_index].clone();
+    match anchor {
+        Some(id) => match find_row_block(lines, &id) {
+            Some((start, len)) => {
+                start + (old_index - block_start(old_rows, old_index)).min(len - 1)
+            }
+            None => fallback_after_removal(old_rows, lines, old_index),
+        },
+        None => {
+            // Untagged tail lines (connecting/dead/error) carry no row identity;
+            // approximate by preserving distance from the end of the transcript.
+            let distance_from_end = old_rows.len() - old_index;
+            lines.len().saturating_sub(distance_from_end)
+        }
+    }
+}
+
+/// Index of the first line belonging to `id`, and how many lines it spans.
+/// A row's wrapped lines are always contiguous in `lines` — `build_lines`
+/// emits them as one run per row — so a single forward scan suffices.
+fn find_row_block(lines: &[VisualLine], id: &str) -> Option<(usize, usize)> {
+    let start = lines
+        .iter()
+        .position(|line| line.row_id.as_deref() == Some(id))?;
+    let mut end = start;
+    while end + 1 < lines.len() && lines[end + 1].row_id.as_deref() == Some(id) {
+        end += 1;
+    }
+    Some((start, end - start + 1))
+}
+
+/// First index of the contiguous run that `index` sits in within `rows`.
+fn block_start(rows: &[Option<String>], index: usize) -> usize {
+    let mut start = index;
+    while start > 0 && rows[start - 1] == rows[index] {
+        start -= 1;
+    }
+    start
+}
+
+/// The anchor row is gone (removed, or replaced wholesale by a fresh
+/// snapshot). Search outward from its old position, nearest first, for a
+/// still-live neighbour row and land on its first line; if none of the old
+/// layout's rows survived, fall back to the raw old index clamped into the
+/// new layout.
+fn fallback_after_removal(
+    old_rows: &[Option<String>],
+    lines: &[VisualLine],
+    old_index: usize,
+) -> usize {
+    let len = old_rows.len();
+    let mut distance = 1usize;
+    loop {
+        if distance > old_index && old_index + distance >= len {
+            return old_index.min(lines.len().saturating_sub(1));
+        }
+        if distance <= old_index {
+            if let Some((start, _)) = old_rows[old_index - distance]
+                .as_ref()
+                .and_then(|id| find_row_block(lines, id))
+            {
+                return start;
+            }
+        }
+        if old_index + distance < len {
+            if let Some((start, _)) = old_rows[old_index + distance]
+                .as_ref()
+                .and_then(|id| find_row_block(lines, id))
+            {
+                return start;
+            }
+        }
+        distance += 1;
+    }
+}
+
 fn build_lines(state: &StructuredState, width: usize) -> Vec<VisualLine> {
     let mut out = Vec::new();
-    for row in &state.rows {
+    for (index, row) in state.rows.iter().enumerate() {
         if row.kind == TranscriptRowKind::Plan {
             continue;
         }
         let row_width = width.saturating_sub(1).max(1);
+        let start = out.len();
         match row.kind {
             TranscriptRowKind::User => push_wrapped(
                 &mut out,
@@ -264,10 +357,53 @@ fn build_lines(state: &StructuredState, width: usize) -> Vec<VisualLine> {
             ),
             TranscriptRowKind::Plan => {}
         }
+        if out.len() > start
+            && state.rows[index + 1..]
+                .iter()
+                .any(|next| next.kind != TranscriptRowKind::Plan)
+        {
+            // A blank surface line is the vertical padding that keeps adjacent
+            // transcript blocks readable at a glance.
+            out.push(VisualLine {
+                text: String::new(),
+                row_id: None,
+                rail: false,
+                tone: Tone::Normal,
+            });
+        }
     }
     out
 }
 
+/// Text supplied to the terminal clipboard when a transcript block is
+/// clicked. It preserves the full tool detail rather than its compact preview.
+pub fn copy_text(row: &TranscriptRow) -> String {
+    match row.kind {
+        TranscriptRowKind::User
+        | TranscriptRowKind::AgentText
+        | TranscriptRowKind::AgentThought => content_text(row),
+        TranscriptRowKind::ToolCall | TranscriptRowKind::ToolDiff => {
+            let (name, argument) = tool_title(row);
+            let mut lines = vec![if argument.is_empty() {
+                name
+            } else {
+                format!("{name}  {argument}")
+            }];
+            lines.extend(tool_content_lines(row, None));
+            lines.join("\n")
+        }
+        TranscriptRowKind::Approval => row
+            .data
+            .get("toolCall")
+            .and_then(|tool| tool.get("title"))
+            .and_then(serde_json::Value::as_str)
+            .unwrap_or("permission requested")
+            .into(),
+        TranscriptRowKind::Notice => "[notice]".into(),
+        TranscriptRowKind::Plan => String::new(),
+    }
+}
+
 fn push_wrapped(
     out: &mut Vec<VisualLine>,
     row: &TranscriptRow,
@@ -908,6 +1044,39 @@ mod tests {
         );
     }
 
+    #[test]
+    fn transcript_blocks_have_a_padding_line_between_them() {
+        let mut state = StructuredState::default();
+        state.rows = vec![
+            row(
+                "one",
+                TranscriptRowKind::User,
+                json!({"content":{"type":"text","text":"first"}}),
+            ),
+            row(
+                "two",
+                TranscriptRowKind::AgentText,
+                json!({"content":{"type":"text","text":"second"}}),
+            ),
+        ];
+
+        let lines = build_lines(&state, 80);
+        assert_eq!(lines.len(), 3);
+        assert_eq!(lines[1].text, "");
+        assert!(lines[1].row_id.is_none());
+    }
+
+    #[test]
+    fn copying_a_tool_keeps_its_full_detail() {
+        let tool = row(
+            "t",
+            TranscriptRowKind::ToolCall,
+            json!({"title":"Bash(cargo test)","content":[{"type":"content","content":{"type":"text","text":"all green"}}]}),
+        );
+
+        assert_eq!(copy_text(&tool), "Bash  cargo test\nall green");
+    }
+
     #[test]
     fn tool_is_compact_until_selected_row_expands() {
         let mut state = StructuredState::default();
@@ -1272,4 +1441,213 @@ mod tests {
         assert!(text.contains("adapter exited"), "{text}");
         assert!(text.contains("request failed"), "{text}");
     }
+
+    fn test_pane() -> StructuredPane {
+        StructuredPane {
+            handle: StructuredHandle::test_handle(StructuredState::default()),
+            focused: true,
+            mode: Mode::Normal,
+            session_status: SessionStatus::Running,
+            activity_detail: None,
+        }
+    }
+
+    fn numbered_rows(state: &mut StructuredState, count: usize) {
+        for n in 0..count {
+            state.rows.push(row(
+                &format!("r{n}"),
+                TranscriptRowKind::AgentText,
+                json!({"content":{"type":"text","text":format!("line {n}")}}),
+            ));
+        }
+    }
+
+    fn grow_row(state: &mut StructuredState, id: &str) {
+        let index = state.rows.iter().position(|r| r.id == id).unwrap();
+        state.rows[index] = row(
+            id,
+            TranscriptRowKind::AgentText,
+            json!({"content":{"type":"text","text":"a very long streaming reply that keeps growing and will wrap across several lines now"}}),
+        );
+    }
+
+    fn render_transcript_lines(
+        pane: &StructuredPane,
+        state: &mut StructuredState,
+        width: u16,
+        height: u16,
+    ) -> Vec<String> {
+        let mut terminal = Terminal::new(TestBackend::new(width, height)).unwrap();
+        terminal
+            .draw(|frame| pane.render_transcript(frame, frame.area(), state))
+            .unwrap();
+        let buffer = terminal.backend().buffer().clone();
+        (0..height)
+            .map(|y| {
+                (0..width)
+                    .map(|x| buffer[(x, y)].symbol())
+                    .collect::<String>()
+            })
+            .collect()
+    }
+
+    #[test]
+    fn row_growing_above_the_viewport_keeps_the_visual_anchor() {
+        let pane = test_pane();
+        let mut state = StructuredState::default();
+        state.follow_selection = false;
+        numbered_rows(&mut state, 20);
+        state.scroll = 20;
+
+        let before = render_transcript_lines(&pane, &mut state, 30, 5);
+        assert!(before[0].contains("line 10"), "{before:?}");
+
+        grow_row(&mut state, "r3");
+        let after = render_transcript_lines(&pane, &mut state, 30, 5);
+        assert!(
+            after[0].contains("line 10"),
+            "a row growing above the viewport must not shift what's on screen: {after:?}"
+        );
+    }
+
+    #[test]
+    fn appending_a_row_below_the_viewport_keeps_the_visual_anchor() {
+        let pane = test_pane();
+        let mut state = StructuredState::default();
+        state.follow_selection = false;
+        numbered_rows(&mut state, 20);
+        state.scroll = 20;
+
+        let before = render_transcript_lines(&pane, &mut state, 30, 5);
+        assert!(before[0].contains("line 10"), "{before:?}");
+
+        state.rows.push(row(
+            "r20",
+            TranscriptRowKind::AgentText,
+            json!({"content":{"type":"text","text":"line 20"}}),
+        ));
+        let after = render_transcript_lines(&pane, &mut state, 30, 5);
+        assert_eq!(before, after, "growth below the viewport must not move it");
+    }
+
+    #[test]
+    fn removing_a_row_above_the_viewport_keeps_the_visual_anchor() {
+        let pane = test_pane();
+        let mut state = StructuredState::default();
+        state.follow_selection = false;
+        numbered_rows(&mut state, 20);
+        state.scroll = 20;
+
+        let before = render_transcript_lines(&pane, &mut state, 30, 5);
+        assert!(before[0].contains("line 10"), "{before:?}");
+
+        state.rows.retain(|r| r.id != "r3");
+        let after = render_transcript_lines(&pane, &mut state, 30, 5);
+        assert!(
+            after[0].contains("line 10"),
+            "a row removed above the viewport must not shift what's on screen: {after:?}"
+        );
+    }
+
+    #[test]
+    fn removing_the_anchor_row_falls_back_to_the_nearest_surviving_neighbor() {
+        let pane = test_pane();
+        let mut state = StructuredState::default();
+        state.follow_selection = false;
+        numbered_rows(&mut state, 20);
+        state.scroll = 20;
+
+        let before = render_transcript_lines(&pane, &mut state, 30, 5);
+        assert!(before[0].contains("line 10"), "{before:?}");
+
+        state.rows.retain(|r| r.id != "r10");
+        let after = render_transcript_lines(&pane, &mut state, 30, 5);
+        assert!(
+            after[0].contains("line 9"),
+            "removing the anchor row should fall back to its nearest surviving neighbor: {after:?}"
+        );
+    }
+
+    #[test]
+    fn patching_a_row_above_the_viewport_keeps_the_visual_anchor() {
+        let pane = test_pane();
+        let mut state = StructuredState::default();
+        state.follow_selection = false;
+        numbered_rows(&mut state, 20);
+        state.scroll = 20;
+
+        render_transcript_lines(&pane, &mut state, 30, 5);
+        // Simulate a `TranscriptDelta::Patch` on a collapsed tool row above the
+        // viewport expanding into a multi-line diff.
+        let index = state.rows.iter().position(|r| r.id == "r5").unwrap();
+        state.rows[index] = row(
+            "r5",
+            TranscriptRowKind::ToolDiff,
+            json!({"title":"Edit(x)","content":[{"type":"diff","path":"x","oldText":"a","newText":"a\nb\nc\nd"}]}),
+        );
+        let after = render_transcript_lines(&pane, &mut state, 30, 5);
+        assert!(
+            after[0].contains("line 10"),
+            "a patched row above the viewport must not shift what's on screen: {after:?}"
+        );
+    }
+
+    #[test]
+    fn narrow_width_reconciles_without_panicking() {
+        let pane = test_pane();
+        let mut state = StructuredState::default();
+        state.follow_selection = false;
+        numbered_rows(&mut state, 20);
+        state.scroll = 10;
+
+        render_transcript_lines(&pane, &mut state, 1, 3);
+        grow_row(&mut state, "r3");
+        render_transcript_lines(&pane, &mut state, 1, 3);
+        assert!(state.scroll <= state.line_rows.len());
+    }
+
+    #[test]
+    fn follow_selection_without_a_selection_stays_pinned_to_the_live_edge() {
+        let pane = test_pane();
+        let mut state = StructuredState::default();
+        state.follow_selection = true;
+        state.selected = None;
+        numbered_rows(&mut state, 20);
+
+        let before = render_transcript_lines(&pane, &mut state, 30, 5);
+        assert!(before.last().unwrap().contains("line 19"), "{before:?}");
+
+        state.rows.push(row(
+            "r20",
+            TranscriptRowKind::AgentText,
+            json!({"content":{"type":"text","text":"line 20"}}),
+        ));
+        let after = render_transcript_lines(&pane, &mut state, 30, 5);
+        assert!(
+            after.last().unwrap().contains("line 20"),
+            "bottom-follow must track the live edge as rows are appended: {after:?}"
+        );
+    }
+
+    #[test]
+    fn follow_selection_keeps_the_selected_row_visible_when_a_row_above_it_grows() {
+        let pane = test_pane();
+        let mut state = StructuredState::default();
+        state.follow_selection = true;
+        numbered_rows(&mut state, 20);
+        state.selected = Some("r15".into());
+
+        let before = render_transcript_lines(&pane, &mut state, 30, 5);
+        assert!(
+            before.iter().any(|line| line.contains("line 15")),
+            "{before:?}"
+        );
+
+        grow_row(&mut state, "r3");
+        let after = render_transcript_lines(&pane, &mut state, 30, 5);
+        assert!(
+            after.iter().any(|line| line.contains("line 15")),
+            "the selected row must stay visible while follow_selection is on: {after:?}"
+        );
+    }
 }

crates/maestro-tui/src/structured_task.rs

@@ -25,6 +25,12 @@ pub struct StructuredState {
     pub selected: Option<String>,
     pub expanded: HashSet<String>,
     pub scroll: usize,
+    /// Row id per rendered line from the last render pass, parallel to that
+    /// pass's `lines`. Lets the next render translate `scroll` — a raw index
+    /// into that now-stale layout — back into a row identity before mapping
+    /// it onto the freshly rebuilt layout, so growth/shrinkage above the
+    /// viewport shifts indices without shifting what's on screen.
+    pub(crate) line_rows: Vec<Option<String>>,
     pub follow_selection: bool,
     pub composer: TextInput,
     pub error: Option<String>,
@@ -42,6 +48,7 @@ impl Default for StructuredState {
             selected: None,
             expanded: HashSet::new(),
             scroll: 0,
+            line_rows: Vec::new(),
             follow_selection: true,
             composer: TextInput::default(),
             error: None,
@@ -192,6 +199,18 @@ impl StructuredState {
         self.follow_selection = true;
     }
 
+    /// Select the transcript block under a rendered transcript line. Pointer
+    /// input uses the same row identity map as scroll reconciliation, so a
+    /// wrapped block behaves as one target.
+    pub fn select_rendered_line(&mut self, line: usize) -> bool {
+        let Some(id) = self.line_rows.get(line).and_then(Clone::clone) else {
+            return false;
+        };
+        self.selected = Some(id);
+        self.follow_selection = false;
+        true
+    }
+
     pub fn toggle_selected(&mut self) {
         let Some(id) = self.selected.clone() else {
             return;
@@ -650,6 +669,25 @@ mod tests {
         assert_eq!(state.composer.value(), "hi");
     }
 
+    #[test]
+    fn selecting_a_rendered_line_selects_its_whole_block() {
+        let mut state = StructuredState {
+            line_rows: vec![
+                Some("one".into()),
+                Some("one".into()),
+                None,
+                Some("two".into()),
+            ],
+            ..Default::default()
+        };
+
+        assert!(state.select_rendered_line(1));
+        assert_eq!(state.selected.as_deref(), Some("one"));
+        assert!(!state.follow_selection);
+        assert!(!state.select_rendered_line(2));
+        assert_eq!(state.selected.as_deref(), Some("one"));
+    }
+
     #[test]
     fn authoritative_idle_snapshot_reconciles_a_wholly_missed_turn() {
         let mut state = StructuredState::default();

crates/maestro/Cargo.toml

@@ -29,3 +29,6 @@ tracing-subscriber.workspace = true
 maestro-cli = { path = "../maestro-cli", optional = true, default-features = false }
 maestro-daemon = { path = "../maestro-daemon", optional = true, default-features = false }
 maestro-tui = { path = "../maestro-tui", optional = true }
+
+[dev-dependencies]
+tempfile.workspace = true

crates/maestro/tests/subcommand_routing.rs

@@ -0,0 +1,102 @@
+//! Process-level routing for the umbrella `maestro` binary (#10): each
+//! enabled top-level subcommand must reach its own crate's runtime dispatch,
+//! not just parse successfully.
+//!
+//! A malformed `--config` file makes every crate's dispatch fail identically
+//! at config load, before any subcommand touches tmux, the network, or a
+//! terminal. That lets the assertions tell "clap parsed it but the handler
+//! never ran" (a usage error, exit 2) apart from "it dispatched into the real
+//! crate" (a `toml decode` runtime error via `main`'s `maestro: {e}` printer,
+//! exit 1).
+//!
+//! The absence tests below only compile when the matching feature is off, so
+//! they run under CI's per-feature-subset matrix (`--no-default-features
+//! --features cli|daemon|tui`) rather than the default all-features build.
+
+use std::io::Write;
+use std::path::PathBuf;
+use std::process::{Command, Output};
+
+fn bin() -> PathBuf {
+    PathBuf::from(env!("CARGO_BIN_EXE_maestro"))
+}
+
+fn bad_config() -> tempfile::NamedTempFile {
+    let mut f = tempfile::NamedTempFile::new().expect("create temp config file");
+    write!(f, "this is not valid toml {{{{{{").expect("write temp config");
+    f
+}
+
+fn run(args: &[&str]) -> Output {
+    Command::new(bin())
+        .args(args)
+        .output()
+        .unwrap_or_else(|e| panic!("spawn `maestro {args:?}`: {e}"))
+}
+
+/// Real dispatch happened: exit 1, `main`'s `"maestro: {e}"` prefix, and the
+/// config crate's error surfacing through — never clap's own usage-error
+/// page, which would mean the subcommand never reached its handler.
+fn assert_dispatched(out: &Output) {
+    let stderr = String::from_utf8_lossy(&out.stderr);
+    assert_eq!(out.status.code(), Some(1), "stderr:\n{stderr}");
+    assert!(stderr.starts_with("maestro: "), "stderr:\n{stderr}");
+    assert!(stderr.contains("toml decode"), "stderr:\n{stderr}");
+    assert!(!stderr.contains("Usage:"), "stderr:\n{stderr}");
+}
+
+/// Never reached a handler: clap rejected the subcommand outright because the
+/// feature that defines it is off. Only used by the `not(feature = "...")`
+/// tests below, which themselves only exist in a single-feature build.
+#[cfg(not(all(feature = "cli", feature = "daemon", feature = "tui")))]
+fn assert_unrecognized(out: &Output, name: &str) {
+    let stderr = String::from_utf8_lossy(&out.stderr);
+    assert_eq!(out.status.code(), Some(2), "stderr:\n{stderr}");
+    assert!(
+        stderr.contains("unrecognized subcommand"),
+        "stderr:\n{stderr}"
+    );
+    assert!(stderr.contains(name), "stderr:\n{stderr}");
+}
+
+#[cfg(feature = "cli")]
+#[test]
+fn list_dispatches_into_maestro_cli() {
+    let cfg = bad_config();
+    let out = run(&["list", "--config", cfg.path().to_str().unwrap()]);
+    assert_dispatched(&out);
+}
+
+#[cfg(not(feature = "cli"))]
+#[test]
+fn list_is_unrecognized_without_cli_feature() {
+    assert_unrecognized(&run(&["list"]), "list");
+}
+
+#[cfg(feature = "daemon")]
+#[test]
+fn daemon_dispatches_into_maestro_daemon() {
+    let cfg = bad_config();
+    let out = run(&["daemon", "--config", cfg.path().to_str().unwrap()]);
+    assert_dispatched(&out);
+}
+
+#[cfg(not(feature = "daemon"))]
+#[test]
+fn daemon_is_unrecognized_without_daemon_feature() {
+    assert_unrecognized(&run(&["daemon"]), "daemon");
+}
+
+#[cfg(feature = "tui")]
+#[test]
+fn tui_dispatches_into_maestro_tui() {
+    let cfg = bad_config();
+    let out = run(&["tui", "--config", cfg.path().to_str().unwrap()]);
+    assert_dispatched(&out);
+}
+
+#[cfg(not(feature = "tui"))]
+#[test]
+fn tui_is_unrecognized_without_tui_feature() {
+    assert_unrecognized(&run(&["tui"]), "tui");
+}

docs/INSTALL.md

@@ -195,25 +195,28 @@ An unknown name is rejected as an `[tui].theme` configuration error.
 The full action vocabulary is the `Action` enum in
 `crates/maestro-tui/src/action.rs`.
 
-## Structured sessions: `claude-code-acp`
+## Structured sessions: ACP adapters
 
-A session spawned with `view: Structured` (#134) runs Claude Code as a child
+A session spawned with `view: Structured` runs Claude Code or Codex as a child
 of the daemon over the Agent Client Protocol instead of in a tmux pane. The
-daemon resolves the adapter binary, `claude-code-acp`, on its `PATH` at spawn
-time. Install it once per host:
+resolved session command selects the adapter binary, which must be on the
+session's `PATH` when the spawn request sets one, or the daemon's `PATH`
+otherwise. Install the adapter for each provider you use:
 
 ```sh
 npm install -g --prefix ~/.local @zed-industries/claude-code-acp
+npm install -g --prefix ~/.local @agentclientprotocol/codex-acp
 ```
 
-That puts `claude-code-acp` in `~/.local/bin`, which must be on the daemon's
-`PATH` (a systemd user unit does not read your shell profile; set
+That puts `claude-code-acp` and `codex-acp` in `~/.local/bin`, which must be on
+the applicable `PATH` (a systemd user unit does not read your shell profile; set
 `Environment=PATH=…` in the unit or install somewhere already on it). The
-adapter needs a logged-in Claude Code (`claude /login`).
+Claude adapter needs a logged-in Claude Code (`claude /login`); Codex uses the
+Codex CLI's or adapter's configured authentication.
 
 When the adapter is missing the spawn still creates the session, marked dead
-with the install command above as its activity detail, so the sidebar says
-what to run. The adapter is a child of the daemon: it ends with a `DELETE
+with the provider-specific install command as its activity detail, so clients
+say what to run. The adapter is a child of the daemon: it ends with a `DELETE
 /api/sessions/:id` (`session/cancel`, then `SIGTERM`) and with the daemon
 itself. A daemon restart ends an in-flight structured turn, but preserves its
 worktree, session record, and event-log transcript. The replacement daemon

docs/SIDEBAR.md

@@ -160,6 +160,7 @@ The state word is never spelled out — the colour carries it.
 | ---------------- | --------- | ---------------- |
 | `Active`         | `--live`  | `active`         |
 | `Idle`           | `--muted` | `idle`           |
+| `Starting`       | `--muted` | `idle`           |
 | `AwaitingInput`  | `--warn`  | `awaiting`       |
 | `Error`          | `--danger`| `error`          |
 

docs/STRUCTURED-VIEW.md

@@ -16,10 +16,10 @@ does not exist yet, and nothing here describes it.
 
 A terminal session's agent runs inside a tmux pane; a structured session's
 agent runs as a subprocess of the daemon itself, speaking ACP over stdio. The
-daemon is the ACP **client**; the adapter process, `claude-code-acp`, is the
-ACP **agent** — it wraps Claude Code's own SDK and translates the model's
-tool calls into ACP `session/update` notifications instead of drawing them to
-a pane. `crates/maestro-acp` owns the daemon's side of that connection;
+daemon is the ACP **client**; the provider adapter process is the ACP
+**agent**. It translates the provider's events into ACP `session/update`
+notifications instead of drawing them to a pane. `crates/maestro-acp` owns the
+daemon's side of that connection;
 `crates/maestro-daemon/src/projection.rs` folds what it receives into the two
 projections below.
 
@@ -35,32 +35,44 @@ session's worktree holds unsaved work — applies to a structured session
 exactly as it does to a terminal one; only what gets terminated differs (an
 ACP handle instead of a tmux pane).
 
+## Choosing the view
+
+`view` is fixed at spawn and never changes. Every client picks it the same
+way, from the resolved command alone
+(`maestro_protocol::display::supports_structured_view`): a command that
+resolves to Claude Code or Codex spawns **Structured** by default, anything
+else spawns **Terminal**. The operator can override the default — the web and
+TUI spawn forms show the checkbox ticked and let it be unticked, and
+`maestro spawn` takes `--terminal` (or `--structured`, which sends the request
+even for a command the CLI does not recognise and lets the daemon refuse it).
+Once the operator works the toggle, a later command change never re-ticks it
+under them; it can still be forced off when the new command has no adapter.
+
+The daemon is the last word: a `Structured` request for a command with no
+adapter is refused there, whichever client sent it.
+
 ## The adapter
 
-`ADAPTER_BIN` (`claude-code-acp`) is resolved by walking `PATH` — the
-session's own `PATH` env var if the spawn request set one, the daemon's
-otherwise — and taking the first executable file named `claude-code-acp` on
-it. Install it once per host:
+The resolved structured command selects a provider adapter. Its binary is
+resolved by walking the session's `PATH` when the spawn request sets one, or
+the daemon's `PATH` otherwise, and taking the first executable with that name.
 
-```sh
-npm install -g --prefix ~/.local @zed-industries/claude-code-acp
-```
+| Command | Adapter binary | Install command | Provider detail |
+| --- | --- | --- | --- |
+| `claude` | `claude-code-acp` | `npm install -g --prefix ~/.local @zed-industries/claude-code-acp` | Needs a logged-in Claude Code. |
+| `codex` | `codex-acp` | `npm install -g --prefix ~/.local @agentclientprotocol/codex-acp` | Uses Codex CLI or adapter-configured authentication; it advertises model, reasoning-effort, agent-mode, and optional fast-mode configuration. |
 
-That is `maestro_acp::INSTALL_COMMAND`, and it is not just documentation: it
-is baked into `AcpError::AdapterMissing`'s message. When the adapter cannot
-be found, spawn still creates the session — **Dead**, with that install
-command as its `activity_detail` — so the sidebar names the fix instead of
-the session silently never appearing (see `docs/INSTALL.md` for the full
-install writeup, including the systemd `PATH` caveat). The adapter also needs
-a logged-in Claude Code (`claude /login`); a missing login surfaces the same
-way, via the adapter's own stderr tail in the failure message.
+The selected install command is baked into `AcpError::AdapterMissing`. When an
+adapter cannot be found, spawn still creates a **Dead** session with that
+command as `activity_detail` (see `docs/INSTALL.md` for the systemd `PATH`
+caveat). Provider authentication failures surface through the adapter's stderr
+tail in the same field.
 
 The handshake is bounded by `HANDSHAKE_TIMEOUT` (60s) — long enough for a
-slow machine to boot a node process and the Claude Code SDK behind it, never
-long enough to hang a spawn indefinitely. Any handshake failure — missing
-adapter, early exit, a protocol error, or the timeout — leaves no orphaned
-process: `spawn` closes and reaps the child itself before returning the
-error.
+slow machine to boot an adapter and its provider process, never long enough
+to hang a spawn indefinitely. Any handshake failure — missing adapter, early
+exit, a protocol error, or the timeout — leaves no orphaned process: `spawn`
+closes and reaps the child itself before returning the error.
 
 ## The ACP handshake
 
@@ -69,17 +81,17 @@ declares, deliberately, almost nothing:
 
 | Capability | Declared | Why |
 | --- | --- | --- |
-| `fs.readTextFile` | `false` | The adapter uses Claude Code's own Read tool instead of asking the daemon to read a file on its behalf — the same tool a terminal-view Claude Code session uses. |
-| `fs.writeTextFile` | `false` | Same reasoning, for Write. |
-| `terminal` | `false` | The adapter runs Claude Code's own Bash tool rather than asking the daemon to open a terminal for it. |
+| `fs.readTextFile` | `false` | Providers read the session workspace through their own tool surface. |
+| `fs.writeTextFile` | `false` | Providers write the session workspace through their own tool surface. |
+| `terminal` | `false` | Providers run commands through their own tool surface. |
 
 Declining all three keeps the daemon out of the file/terminal surface
 entirely — the adapter already has direct access to the session's `cwd`, and
 routing every read, write, and shell command through the daemon would only
 add a hop with no new capability. Every other capability namespace ACP
 defines (session extensions, auth, elicitation) is simply left at its
-default; the daemon does not advertise support because `claude-code-acp` has
-never asked for it, not because it was weighed and refused.
+default; the daemon does not advertise support because neither supported
+adapter needs it, not because it was weighed and refused.
 
 The one client method that *is* implemented for real is
 `session/request_permission` (#139) — see [Approvals](#approvals) below.
@@ -96,6 +108,14 @@ flight is dropped on arrival, deliberately: the daemon's own event log
 already holds that history, and forwarding it too would duplicate every row
 in the projections below.
 
+Codex and Claude differ in what they emit, not in this lifecycle. Codex maps
+shell commands, file changes, MCP calls, web search, image generation/view,
+reasoning, plans, and token usage into standard ACP chunks and tool calls;
+those fold into the same eight rows. Codex's `available_commands_update` and
+`session_info_update`, like equivalent Claude updates, remain opaque
+`Notice` rows. Its `session/load` capability is required for daemon recovery
+just as it is for Claude.
+
 ## The eight transcript row kinds
 
 `TranscriptRowKind` (`maestro-protocol`) is the alphabet a structured
@@ -106,14 +126,14 @@ crate.
 
 | Kind | Carries | Row identity |
 | --- | --- | --- |
-| `User` | An echoed `user_message_chunk` — the prompt text as ACP saw it. | `user:<message_id>`, or `user:<seq>` when the chunk carries no id. |
-| `AgentText` | An `agent_message_chunk` — the agent's visible reply, streamed. | `agent:<message_id>` / `agent:<seq>`. Later chunks for the same id are appended into `data.content.text` in place, not appended as new rows. |
-| `AgentThought` | An `agent_thought_chunk` — the model's reasoning stream. | `thought:<message_id>` / `thought:<seq>`, coalesced the same way as `AgentText`. |
+| `User` | The prompt accepted by Maestro's structured prompt endpoint, persisted before ACP dispatch. An adapter `user_message_chunk` is also supported for imported ACP history. | `user:<uuid>` for a daemon-recorded prompt; `user:<message_id>` or `user:<seq>` for an ACP chunk. |
+| `AgentText` | An `agent_message_chunk` — the agent's visible reply, streamed. | `agent:<message_id>`, or `agent:<seq>` from the first chunk when no id is supplied. Later chunks for the same id—or consecutive anonymous text chunks—are appended into `data.content.text` in place. An empty anonymous chunk starts a fresh row, matching the turn marker emitted by adapters that omit message ids. |
+| `AgentThought` | An `agent_thought_chunk` — the model's reasoning stream. | `thought:<message_id>` / first anonymous `thought:<seq>`, coalesced the same way as `AgentText`. |
 | `ToolCall` | A `tool_call` / `tool_call_update` pair whose content carries no diff. | `tool:<tool_call_id>` — one row for the call's whole life; updates patch it in place, they never create a second row. |
 | `ToolDiff` | The same tool-call machinery, when the tool's content includes a `Diff` block. | Same `tool:<tool_call_id>` identity as `ToolCall`; the *kind* flips between the two as the tool's own content changes, not the row. |
 | `Approval` | A daemon-originated permission request (`RequestPermissionRequest`), serialized without its nonce. | `approval:<uuid>` — minted fresh per request, unrelated to the ACP request's own id. |
 | `Plan` | A `plan` update — the agent's current step list. | The fixed id `"plan"`. Each new plan **replaces** the row wholesale; entries are not diffed against the previous plan. |
-| `Notice` | The raw JSON of any `session/update` variant the ACP dependency already decodes but the projection does not special-case. | `notice:<seq>`. |
+| `Notice` | The raw JSON of any `session/update` variant the ACP dependency already decodes but the projection does not special-case. Maestro also uses a tagged `maestroTurnMeta` notice as the durable footer for a completed, cancelled, or failed turn. | `notice:<seq>` for ACP updates; `turn_meta:<uuid>` for a turn footer. |
 
 `Notice` covers known-but-unspecialized `SessionUpdate` variants: ones the
 `agent-client-protocol` dependency's schema already deserializes (it
@@ -147,7 +167,10 @@ choices, not daemon ones.
   TUI renderers can never disagree about it.
 - Turn lifecycle: when a turn begins, and whether an ACP response, a cancel,
   or a failure ends it (`TurnState.responding` / `.thinking` /
-  `.active_tool_calls` are derived, not renderer-computed).
+  `.active_tool_calls` / `.started_at` are derived, not renderer-computed).
+  Ending a turn appends a durable `maestroTurnMeta` footer with its elapsed
+  time, outcome, model, and context-window usage/delta. ACP does not expose
+  provider billing-token counts, so these are explicitly context tokens.
 - Approval nonce minting, secrecy, and the single-active-approval rule (see
   below) — a client never sees an ACP permission request before the daemon
   has already turned it into an `Approval` row and a nonce.
@@ -162,9 +185,31 @@ choices, not daemon ones.
 **A client decides:**
 
 - How each row kind is drawn — markdown for `AgentText`/`AgentThought`, a
-  diff view for `ToolDiff`, a tool card for `ToolCall`, a checklist for
-  `Plan`, and a floor presentation for `Notice`.
-- How `responding` vs. `thinking` are distinguished visually, if at all.
+  diff view for `ToolDiff`, a tool card for `ToolCall`, and a floor
+  presentation for `Notice`. `Plan` is the exception: both clients omit it
+  from the transcript; the TUI may show the current plan in its status line,
+  while the web client deliberately has no stats or plan rail.
+- The web client groups two or more tool rows after the same `User` row into
+  one collapsed turn activity block. `AgentText` and `AgentThought` rows that
+  appear *between* tool rows in the same turn are absorbed into the group
+  (intermediate narration); the last `AgentText` with no subsequent tool stays
+  outside as the prominent final answer. While a turn is still active
+  (responding or thinking), the most recent intermediate `AgentText` or
+  `AgentThought` in the group is kept outside as visible narration — replaced
+  by the next text row when one arrives, and absorbed into the group when the
+  turn ends. The header still reads "N tool calls" (counting only tool rows).
+  Opening the group reveals tools and intermediate text in chronological
+  order, with the text rendered in a subdued style.
+- The web client's user, agent, thought, tool-detail, and notice text blocks
+  copy their complete source text when clicked or keyboard-activated.
+- The web client consumes `available_commands_update` notices as the live
+  source for composer `/` autocomplete at any whitespace-delimited token under
+  the caret. Completing a command replaces only that token. The client omits
+  those state-only notices, along with `session_info_update`, from the visible
+  transcript.
+- How live `responding`, `thinking`, tool activity, elapsed time, and context
+  usage are drawn. The web client keeps these in a compact strip above the
+  composer and renders each durable turn footer inline with the transcript.
 - How the operator is asked to resolve an `Approval` row — the daemon only
   exposes the three-way decision (`AllowOnce` / `AllowForSession` / `Deny`),
   never the UI that solicits it.
@@ -195,8 +240,9 @@ every row, once appended, is only ever patched or left alone.
 
 The event log's own line position is the cursor: 1-based, shared by ACP
 notifications and daemon-generated rows alike (`sidecar.rs`'s
-`PersistedEvent` envelope is what lets an `Approval` row share a cursor
-sequence with raw ACP JSON without pretending to be ACP traffic). Two ways to
+`PersistedEvent` envelope is what lets `User` and `Approval` rows share a cursor
+sequence with raw ACP JSON without pretending to be ACP traffic; the envelope
+also carries durable `Turn` footers). Two ways to
 read it:
 
 - **`WS /api/structured/:id`** — on connect, sends a `TranscriptSnapshot` and
@@ -245,7 +291,7 @@ pending decision, entirely on the daemon side:
 - **Secrecy from the agent and from durable history.** The adapter itself
   never learns the nonce — it is a daemon-to-client secret, never sent back
   over the ACP connection. It is likewise never written to the event log:
-  restoring an `Approval` row from disk (`Projection::restore_approval`)
+  restoring an `Approval` row from disk (`Projection::restore_row`)
   produces a historical row with no `pending_approval` in state, because the
   nonce that would make it "pending" never made it to disk in the first
   place. A restart therefore cannot resume a pending approval — see
@@ -279,6 +325,26 @@ pending decision, entirely on the daemon side:
 
 ## Prompt and cancel: bounded liveness
 
+The web composer accepts up to ten files through its attachment picker, file
+drop, or clipboard. Pasted text of at least 4,000 characters or 40 lines becomes
+a UTF-8 `.txt` attachment. Shorter pastes stay in the composer. Attachments can
+be removed before sending; failed sends retain the draft and attachments.
+Pastes also stay inline when all ten attachment slots are occupied or the text
+exceeds the 20 MiB file limit.
+
+On send, `POST /api/sessions/:id/structured/attachments?name=<filename>` uploads
+each file as raw bytes (20 MiB maximum) and returns its absolute `path`.
+Only live structured sessions accept uploads. Filenames are limited to 180
+bytes and cannot contain directory separators or control characters. Files get unique names and private
+file permissions in `<id>.attachments` beside the session sidecar. They persist
+across daemon restarts; removing a composer chip does not delete uploaded data.
+There is currently no automatic attachment cleanup.
+
+The prompt includes each filename and host path so the adapter can read it
+through its own file tools, including images when the provider supports them.
+These references are persisted in the ordinary user transcript row. Attachment
+bytes are not embedded in ACP messages or transcript history.
+
 `POST /api/sessions/:id/structured/prompt` and `.../cancel` are serialized
 against each other through one per-session `operation` lock
 (`AcpEventStream::operation`), because ACP permission callbacks carry no
@@ -287,9 +353,15 @@ thing a callback can be attributed to, so at most one turn may ever be
 in flight, and a cancelled turn must fully settle before the next prompt is
 allowed to claim the daemon's idea of "the active turn."
 
-- A prompt claims the turn and dispatches it to ACP as one operation. While a
+- Web clients may collect a visible FIFO of operator messages while a turn is
+  active. They submit each queued message only after the projected turn becomes
+  idle; the queue is client-local and unsent messages do not survive a reload.
+- A submitted prompt is appended as a durable `User` row before it claims the turn and
+  dispatches to ACP, so the transcript never depends on an adapter echoing the
+  operator's input. If that append fails, the prompt is not dispatched. While a
   turn is active, a second prompt gets `409 turn_in_flight` rather than
-  queuing — one active turn per session, never a hidden queue of prompts.
+  queuing in the daemon — one active turn per session, never a hidden
+  server-side queue of prompts.
 - Cancel sends `session/cancel`, clears any pending approval as `Cancelled`,
   and ends the turn's client-visible lifecycle immediately. If the cancelled
   turn was still *dispatched* to ACP (waiting on its response), the daemon
@@ -313,8 +385,8 @@ directory: the sidecar itself (`<id>.json`), plus two next to it:
 
 - **`<id>.events.jsonl`** — the unified event log. Each line is either a raw
   ACP `SessionNotification` (kept in its original JSON so old logs stay
-  readable) or a `{"maestroEvent": "approval", "row": …}` envelope for a
-  daemon-generated row. Both share the same 1-based line-position cursor. A
+  readable) or a `{"maestroEvent": "user"|"approval", "row": …}` envelope
+  for a daemon-generated row. Both share the same 1-based line-position cursor. A
   line a hard kill left half-written is terminated before the next append, so
   it keeps its position and is skipped as malformed rather than corrupting
   what follows. An append that fails *while the daemon is running* — a

fixtures/command-resolution.json

@@ -0,0 +1,120 @@
+{
+  "_description": "the parity fixture for #199's command resolver — every case here is asserted identically by crates/maestro-protocol/src/display.rs (command_program/command_tool) and web/src/toolIcon.ts (splitCommand). `program` is the resolved, basenamed program; `tool` is the icon id it maps to, or null when unrecognised/ambiguous.",
+  "cases": [
+    { "command": "claude", "program": "claude", "tool": "claude" },
+    { "command": "claude --resume", "program": "claude", "tool": "claude" },
+    { "command": "CLAUDE", "program": "CLAUDE", "tool": "claude" },
+    { "command": "/usr/local/bin/claude -p hi", "program": "claude", "tool": "claude" },
+    { "command": "./bin/claude", "program": "claude", "tool": "claude" },
+    { "command": "FOO=1 BAR=2 claude", "program": "claude", "tool": "claude" },
+    { "command": "FOO=\"bar baz\" claude", "program": "claude", "tool": "claude" },
+    { "command": "FOO='bar baz' claude", "program": "claude", "tool": "claude" },
+    { "command": "FOO=bar\\ baz claude", "program": "claude", "tool": "claude" },
+    { "command": "'/usr/local/bin/claude'", "program": "claude", "tool": "claude" },
+    { "command": "\"/opt/my agent/claude\" --resume", "program": "claude", "tool": "claude" },
+    { "command": "env -i claude", "program": "claude", "tool": "claude" },
+    { "command": "env --ignore-environment claude", "program": "claude", "tool": "claude" },
+    { "command": "sudo -u root claude", "program": "claude", "tool": "claude" },
+    { "command": "sudo --user=root claude", "program": "claude", "tool": "claude" },
+    { "command": "sudo -- claude --resume", "program": "claude", "tool": "claude" },
+    { "command": "nohup claude", "program": "claude", "tool": "claude" },
+    { "command": "time claude", "program": "claude", "tool": "claude" },
+    { "command": "time -p claude", "program": "claude", "tool": "claude" },
+    { "command": "time -- claude", "program": "claude", "tool": "claude" },
+    { "command": "time -p -- claude", "program": "claude", "tool": "claude" },
+    { "command": "time -pp claude", "program": "time", "tool": null },
+    { "command": "time -p -p claude", "program": "time", "tool": null },
+    { "command": "time -o /tmp/t.log claude", "program": "time", "tool": null },
+    { "command": "command claude", "program": "claude", "tool": "claude" },
+    { "command": "command -v claude", "program": "command", "tool": null },
+    { "command": "command -V claude", "program": "command", "tool": null },
+    { "command": "npx --yes claude-code", "program": "claude-code", "tool": "claude" },
+    { "command": "npx claude-code", "program": "claude-code", "tool": "claude" },
+    { "command": "pnpm --silent dlx claude-code", "program": "claude-code", "tool": "claude" },
+    { "command": "pnpm -C ./pkg dlx claude-code", "program": "claude-code", "tool": "claude" },
+    { "command": "pnpm dlx claude-code", "program": "claude-code", "tool": "claude" },
+    { "command": "pnpm dlx -s claude-code", "program": "claude-code", "tool": "claude" },
+    { "command": "pnpm dlx --silent claude-code", "program": "claude-code", "tool": "claude" },
+    { "command": "yarn --silent dlx claude-code", "program": "claude-code", "tool": "claude" },
+    { "command": "yarn dlx -q claude-code", "program": "claude-code", "tool": "claude" },
+    { "command": "yarn dlx --quiet claude-code", "program": "claude-code", "tool": "claude" },
+    { "command": "bun x claude-code", "program": "claude-code", "tool": "claude" },
+    { "command": "bunx claude-code", "program": "claude-code", "tool": "claude" },
+    { "command": "uvx claude-code", "program": "claude-code", "tool": "claude" },
+    { "command": "bun x --bun claude-code", "program": "claude-code", "tool": "claude" },
+    { "command": "bunx --bun claude-code", "program": "claude-code", "tool": "claude" },
+    { "command": "bun x -p @anthropic-ai/claude-code claude-code", "program": "claude-code", "tool": "claude" },
+    { "command": "bunx --package @anthropic-ai/claude-code claude-code", "program": "claude-code", "tool": "claude" },
+    { "command": "bun x --package=@anthropic-ai/claude-code claude-code", "program": "claude-code", "tool": "claude" },
+    { "command": "bunx --no-install claude-code", "program": "claude-code", "tool": "claude" },
+    { "command": "bun x --verbose claude-code", "program": "claude-code", "tool": "claude" },
+    { "command": "bunx --silent claude-code", "program": "claude-code", "tool": "claude" },
+    { "command": "bun --bun x claude-code", "program": "bun", "tool": null },
+    { "command": "pnpm dlx --package foo claude-code", "program": "claude-code", "tool": "claude" },
+    { "command": "pnpm dlx --package=foo claude-code", "program": "claude-code", "tool": "claude" },
+    { "command": "pnpm dlx --package= claude-code", "program": "pnpm", "tool": null },
+    { "command": "pnpm dlx --package", "program": "pnpm", "tool": null },
+    { "command": "pnpm dlx -c \"claude-code\"", "program": "pnpm", "tool": null },
+    { "command": "pnpm --package=typescript dlx tsc", "program": "tsc", "tool": null },
+    { "command": "pnpm dlx --unknown-flag claude-code", "program": "pnpm", "tool": null },
+    { "command": "yarn dlx --package foo claude-code", "program": "claude-code", "tool": "claude" },
+    { "command": "yarn dlx --package=foo claude-code", "program": "claude-code", "tool": "claude" },
+    { "command": "yarn dlx -p foo claude-code", "program": "claude-code", "tool": "claude" },
+    { "command": "yarn dlx --package= claude-code", "program": "yarn", "tool": null },
+    { "command": "yarn dlx -p", "program": "yarn", "tool": null },
+    { "command": "yarn dlx -p --quiet claude-code", "program": "yarn", "tool": null },
+    { "command": "bunx --package= claude-code", "program": "bunx", "tool": null },
+    { "command": "bunx --package", "program": "bunx", "tool": null },
+    { "command": "bun x -p --silent claude-code", "program": "bun", "tool": null },
+    { "command": "sudo env -i claude", "program": "claude", "tool": "claude" },
+    { "command": "FOO=1 sudo BAR=2 claude", "program": "claude", "tool": "claude" },
+    { "command": "env -iv claude", "program": "claude", "tool": "claude" },
+    { "command": "sudo -nE claude", "program": "claude", "tool": "claude" },
+    { "command": "sudo -uroot claude", "program": "claude", "tool": "claude" },
+    { "command": "sudo -u", "program": "sudo", "tool": null },
+    { "command": "env --unset= claude", "program": "env", "tool": null },
+    { "command": "sudo --user= claude", "program": "sudo", "tool": null },
+    { "command": "sudo --user \"\" claude", "program": "sudo", "tool": null },
+    { "command": "sudo -nu claude", "program": "sudo", "tool": null },
+    { "command": "env -S 'python3 -u' script.py", "program": "env", "tool": null },
+    { "command": "npx -c \"claude --version\"", "program": "npx", "tool": null },
+    { "command": "npx --call \"claude --version\"", "program": "npx", "tool": null },
+    { "command": "command FOO=1 claude", "program": "FOO=1", "tool": null },
+    { "command": "nohup FOO=1 claude", "program": "FOO=1", "tool": null },
+    { "command": "npx FOO=1 claude-code", "program": "FOO=1", "tool": null },
+    { "command": "pnpm dlx FOO=1 claude-code", "program": "FOO=1", "tool": null },
+    { "command": "yarn dlx FOO=1 claude-code", "program": "FOO=1", "tool": null },
+    { "command": "bun x FOO=1 claude-code", "program": "FOO=1", "tool": null },
+    { "command": "bunx FOO=1 claude-code", "program": "FOO=1", "tool": null },
+    { "command": "uvx FOO=1 claude-code", "program": "FOO=1", "tool": null },
+    { "command": "sudo time FOO=1 claude", "program": "claude", "tool": "claude" },
+    { "command": "nohup env FOO=1 claude", "program": "claude", "tool": "claude" },
+    { "command": "sudo command FOO=1 claude", "program": "FOO=1", "tool": null },
+    { "command": "command nohup FOO=1 claude", "program": "FOO=1", "tool": null },
+    { "command": "time command FOO=1 claude", "program": "FOO=1", "tool": null },
+    { "command": "\"FOO=1\" claude", "program": "FOO=1", "tool": null },
+    { "command": "FOO\\=1 claude", "program": "FOO=1", "tool": null },
+    { "command": "F\"O\"O=1 claude", "program": "FOO=1", "tool": null },
+    { "command": "F\\OO=1 claude", "program": "FOO=1", "tool": null },
+    { "command": "\"FOO\"=1 claude", "program": "FOO=1", "tool": null },
+    { "command": "F\"\"OO=1 claude", "program": "FOO=1", "tool": null },
+    { "command": "claude\nclaude-code", "program": "claude", "tool": null },
+    { "command": "clau\\\nde --resume", "program": "claude", "tool": "claude" },
+    { "command": "npx opencode", "program": "opencode", "tool": "opencode" },
+    { "command": "pnpm dlx opencode run", "program": "opencode", "tool": "opencode" },
+    { "command": "pnpm claude", "program": "pnpm", "tool": null },
+    { "command": "yarn claude", "program": "yarn", "tool": null },
+    { "command": "claude-code-acp", "program": "claude-code-acp", "tool": null },
+    { "command": "hx src/main.rs", "program": "hx", "tool": null },
+    { "command": "bash", "program": "bash", "tool": "shell" },
+    { "command": "opencode", "program": "opencode", "tool": "opencode" },
+    { "command": "sudo", "program": "sudo", "tool": null },
+    { "command": "", "program": "", "tool": null },
+    { "command": "npx --unknown-flag claude-code", "program": "npx", "tool": null },
+    { "command": "claude | tee log.txt", "program": "claude", "tool": null },
+    { "command": "claude; echo done", "program": "claude;", "tool": null },
+    { "command": "claude && echo done", "program": "claude", "tool": null },
+    { "command": "echo hi $(claude)", "program": "echo", "tool": null },
+    { "command": "claude \"unterminated", "program": "claude", "tool": null }
+  ]
+}

flake.nix

@@ -148,7 +148,7 @@
             pnpmDeps = (pkgs.fetchPnpmDeps.override { pnpm = pkgs.pnpm_10; }) {
               inherit (finalAttrs) pname version src;
               fetcherVersion = 3;
-              hash = "sha256-hOqiAbnjKsoQnV8lgto5HspDsLIb+48sNLkShIjCZPQ=";
+              hash = "sha256-AzF/rrhqbvl613hNsC18YSylBSVxtatg7fEiUEF1u2o=";
             };
 
             buildPhase = ''

web/index.html

@@ -24,6 +24,7 @@
   </head>
   <body>
     <div id="app"></div>
+    <div id="root"></div>
     <script type="module" src="/src/main.ts"></script>
   </body>
 </html>

web/package-lock.json

@@ -11,7 +11,8 @@
         "@fontsource/jetbrains-mono": "^5.3.0",
         "@xterm/addon-fit": "^0.10.0",
         "@xterm/addon-webgl": "^0.19.0",
-        "@xterm/xterm": "^5.5.0"
+        "@xterm/xterm": "^5.5.0",
+        "marked": "^18.0.11"
       },
       "devDependencies": {
         "happy-dom": "^20.11.6",
@@ -1222,6 +1223,18 @@
         "@jridgewell/sourcemap-codec": "^1.5.5"
       }
     },
+    "node_modules/marked": {
+      "version": "18.0.11",
+      "resolved": "https://registry.npmjs.org/marked/-/marked-18.0.11.tgz",
+      "integrity": "sha512-HnslJfsZkRPBDJRHvVtAaWlZHEpSu7u8LgQuJCELjRKuWR+hpq4A7sLq3p8HaI9ypVoXDXxV34CsQJEe1+J5Aw==",
+      "license": "MIT",
+      "bin": {
+        "marked": "bin/marked.js"
+      },
+      "engines": {
+        "node": ">= 20"
+      }
+    },
     "node_modules/ms": {
       "version": "2.1.3",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",

web/package.json

@@ -6,7 +6,7 @@
   "packageManager": "pnpm@9.15.4",
   "scripts": {
     "dev": "vite",
-    "build": "tsc -b && vite build",
+    "build": "tsc -b tsconfig.build.json && vite build",
     "preview": "vite preview",
     "typecheck": "tsc -b --noEmit",
     "test": "vitest run",
@@ -16,12 +16,23 @@
     "@fontsource/jetbrains-mono": "^5.3.0",
     "@xterm/addon-fit": "^0.10.0",
     "@xterm/addon-webgl": "^0.19.0",
-    "@xterm/xterm": "^5.5.0"
+    "@xterm/xterm": "^5.5.0",
+    "marked": "^18.0.11",
+    "react": "^19.2.8",
+    "react-dom": "^19.2.8"
   },
   "devDependencies": {
+    "@tailwindcss/vite": "^4.3.3",
+    "@testing-library/jest-dom": "^7.0.1",
+    "@testing-library/react": "^16.3.3",
+    "@types/react": "^19.2.18",
+    "@types/react-dom": "^19.2.7",
+    "@vitejs/plugin-react": "^4.7.0",
     "happy-dom": "^20.11.6",
+    "tailwindcss": "^4.3.3",
     "typescript": "^5.6.3",
     "vite": "^5.4.10",
-    "vitest": "^2.1.9"
+    "vitest": "^2.1.9",
+    "zustand": "^5.0.15"
   }
 }

web/src/App.tsx

@@ -0,0 +1,9 @@
+import { ThemeProvider } from "./contexts/ThemeContext";
+
+export function App() {
+  return (
+    <ThemeProvider>
+      <div id="react-root" />
+    </ThemeProvider>
+  );
+}

web/src/api.ts

@@ -12,6 +12,7 @@ import type {
   RecentDirs,
   Session,
   StructuredApprovalDecision,
+  StructuredConfigRequest,
   StructuredPromptRequest,
   Uuid,
 } from "./types.js";
@@ -93,6 +94,21 @@ export async function killSession(id: Uuid, force = false): Promise<void> {
   );
 }
 
+/** Change one option advertised by a live ACP session. */
+export async function setStructuredConfig(
+  id: Uuid,
+  req: StructuredConfigRequest,
+): Promise<void> {
+  await jsonOrError(
+    await fetch(routes.structuredConfig(id), {
+      method: "POST",
+      credentials: "same-origin",
+      headers: { "content-type": "application/json" },
+      body: JSON.stringify(req),
+    }),
+  );
+}
+
 /** Report whether this client's pane is the one currently showing `id` — not
  * merely highlighted in a sidebar. The daemon uses this to clear an
  * `AwaitingInput` glow once the pane has been looked at long enough
@@ -168,6 +184,15 @@ export async function sendStructuredPrompt(id: Uuid, prompt: string): Promise<vo
   );
 }
 
+export async function uploadStructuredFile(id: Uuid, file: File): Promise<{ path: string }> {
+  return jsonOrError(await fetch(`${routes.structuredAttachment(id)}?name=${encodeURIComponent(file.name)}`, {
+    method: "POST",
+    credentials: "same-origin",
+    headers: { "content-type": "application/octet-stream" },
+    body: file,
+  }));
+}
+
 /** Cancel a structured session's active ACP turn (#138). */
 export async function cancelStructuredTurn(id: Uuid): Promise<void> {
   await jsonOrError(

web/src/attach.ts

@@ -64,6 +64,7 @@ export function createAttachConnection(
     <div class="attach-body"></div>
   `;
 
+  const titleEl = el.querySelector(".attach-title") as HTMLSpanElement;
   const body = el.querySelector(".attach-body") as HTMLDivElement;
   const stateEl = el.querySelector(".attach-state") as HTMLSpanElement;
   const disconnectBtn = el.querySelector(".disconnect") as HTMLButtonElement;
@@ -323,6 +324,9 @@ export function createAttachConnection(
   let ws: WebSocket;
   let reconnectMs = INITIAL_RECONNECT_MS;
   let reconnectTimer: number | null = null;
+  // Snapshot replay starts at row zero, which can leave Codex at its oldest line.
+  // Follow it once per socket; later scrolling remains under the operator's control.
+  let awaitingReplay = true;
 
   const sendControl = (msg: ClientControl) => {
     if (ws.readyState !== WebSocket.OPEN) return;
@@ -342,6 +346,7 @@ export function createAttachConnection(
   };
 
   function connect(): void {
+    awaitingReplay = true;
     ws = new WebSocket(attachWsUrl(sessionId));
     ws.binaryType = "arraybuffer";
 
@@ -362,10 +367,20 @@ export function createAttachConnection(
         return;
       }
       if (ev.data instanceof ArrayBuffer) {
-        term.write(new Uint8Array(ev.data));
+        const replay = awaitingReplay;
+        awaitingReplay = false;
+        term.write(new Uint8Array(ev.data), () => {
+          if (replay) term.scrollToBottom();
+        });
       } else if (ev.data instanceof Blob) {
         // Some browsers may default to Blob despite binaryType="arraybuffer".
-        ev.data.arrayBuffer().then((b) => term.write(new Uint8Array(b)));
+        void ev.data.arrayBuffer().then((b) => {
+          const replay = awaitingReplay;
+          awaitingReplay = false;
+          term.write(new Uint8Array(b), () => {
+            if (replay) term.scrollToBottom();
+          });
+        });
       }
     };
 
@@ -463,6 +478,10 @@ export function createAttachConnection(
     // The closure above: the same bytes-out path keystrokes and the mobile key
     // bar already take.
     sendInput,
+    updateInfo(next: AttachInfo) {
+      titleEl.innerHTML = paneTitleHtml(sessionId, next);
+      titleEl.title = paneTitleAttr(sessionId, next);
+    },
     dispose() {
       if (disposed) return;
       disposed = true;

web/src/catalog.ts

@@ -663,8 +663,9 @@ export function renderSidebar(store: CatalogStore, opts: SidebarOptions = {}): S
     applyNav();
   };
 
-  // Hover previews the row under the pointer (docs/PREVIEW.md). Touch is left
-  // out: there is no hover there, and a tap already opens the session.
+  // Pointer hover previews only while Ctrl is held — plain hover was too
+  // disruptive when sweeping the sidebar. Keyboard walk (j/k) still previews
+  // unconditionally via applyNav.
   let hovered: string | null = null;
   const setHovered = (id: string | null) => {
     if (hovered === id) return;
@@ -672,7 +673,7 @@ export function renderSidebar(store: CatalogStore, opts: SidebarOptions = {}): S
     opts.onPreview?.(id);
   };
   treeHost.addEventListener("pointerover", (e) => {
-    if (e.pointerType === "touch") return;
+    if (e.pointerType === "touch" || !e.ctrlKey) return;
     const row = (e.target as HTMLElement | null)?.closest<HTMLElement>(".tree-leaf");
     setHovered(row?.dataset.sessionId ?? null);
   });

web/src/commandBar.ts

@@ -21,7 +21,7 @@ import {
   type MatchRange,
   type MatchResult,
   type SessionCandidate,
-} from "./matcher.js";
+} from "./utils/matcher.js";
 import { splitPath } from "./paths.js";
 import { splitCommand } from "./toolIcon.js";
 import { abbreviateCwd, sessionName, sessionTreePath, type Session } from "./types.js";

web/src/components/commandBar/ActionPage.tsx

@@ -0,0 +1,34 @@
+// A session's action page (docs/COMMAND-BAR.md, "Drill-in"): the same overlay
+// over kill, rename and spawn similar, still fuzzy searchable. The page names
+// the session it acts on, so the target is never ambiguous.
+
+import { sessionName, type Session } from "../../types.js";
+import { ResultList } from "./ResultList.js";
+import type { BarGroup } from "./model.js";
+
+export interface ActionPageProps {
+  session: Session;
+  /** The three actions, ranked by the query line — one kind, so no headers. */
+  groups: BarGroup[];
+  highlighted: number;
+  onActivate(index: number): void;
+}
+
+export function ActionPage({ session, groups, highlighted, onActivate }: ActionPageProps) {
+  return (
+    <>
+      <div
+        role="presentation"
+        className="cmdbar-page-header border-b border-border px-sp-3 py-sp-1 text-fs-11 text-muted"
+      >
+        {`Actions for "${sessionName(session)}"`}
+      </div>
+      <ResultList
+        groups={groups}
+        showHeaders={false}
+        highlighted={highlighted}
+        onActivate={onActivate}
+      />
+    </>
+  );
+}

web/src/components/commandBar/CommandBar.test.tsx

@@ -0,0 +1,407 @@
+// @vitest-environment happy-dom
+import { cleanup, fireEvent, render, screen, waitFor } from "@testing-library/react";
+import { afterEach, describe, expect, it, vi } from "vitest";
+
+import {
+  KILL_SESSION_EVENT,
+  RENAME_SESSION_EVENT,
+  SESSION_SELECT_EVENT,
+  SPAWN_SIMILAR_EVENT,
+} from "../../catalog.js";
+import { COMMAND_SPECS, type Command } from "../../commands.js";
+import type { Session } from "../../types.js";
+import { CommandBar, SPAWN_DIRECTORY_EVENT, type CommandBarProps } from "./CommandBar.js";
+
+vi.mock("../../api.js", async (importOriginal) => ({
+  ...(await importOriginal<Record<string, unknown>>()),
+  listDir: vi.fn(async () => ({ path: "", entries: [] })),
+  projects: vi.fn(async () => []),
+  recentDirs: vi.fn(async () => ({ dirs: [] })),
+}));
+
+function session(id: string, over: Partial<Session> = {}): Session {
+  return {
+    id,
+    cwd: "/home/me/dev/api",
+    command: "bash",
+    env: {},
+    metadata: { name: id },
+    status: "Running",
+    created_at: "2026-01-01T00:00:00Z",
+    ...over,
+  };
+}
+
+function command(over: Partial<Command> = {}): Command {
+  return {
+    id: "cmd",
+    label: "A command",
+    group: "Test",
+    keys: ["a"],
+    scope: "global",
+    run: () => {},
+    ...over,
+  };
+}
+
+const sessions = [
+  session("api", { current_cwd: "/home/me/dev/api", last_focused_at: "2026-01-01T11:00:00Z" }),
+  session("worker", {
+    current_cwd: "/home/me/dev/worker",
+    last_focused_at: "2026-01-01T10:00:00Z",
+  }),
+  session("notes", { current_cwd: "/home/me/notes" }),
+];
+
+function open(over: Partial<CommandBarProps> = {}) {
+  return render(
+    <CommandBar
+      sessions={sessions}
+      homeDir="/home/me"
+      commands={[]}
+      onOpenSession={() => {}}
+      onClose={() => {}}
+      {...over}
+    />,
+  );
+}
+
+function input(): HTMLInputElement {
+  return screen.getByRole("combobox") as HTMLInputElement;
+}
+
+function type(value: string): void {
+  fireEvent.change(input(), { target: { value } });
+}
+
+function press(key: string, init: Record<string, unknown> = {}): void {
+  fireEvent.keyDown(input(), { key, ...init });
+}
+
+function rowNames(): string[] {
+  return [...document.querySelectorAll(".cmdbar-row-name")].map((r) => r.textContent ?? "");
+}
+
+function activeName(): string | undefined {
+  return document.querySelector(".cmdbar-row.is-active .cmdbar-row-name")?.textContent ?? undefined;
+}
+
+afterEach(() => {
+  cleanup();
+  vi.clearAllMocks();
+});
+
+describe("the overlay", () => {
+  it("is a registry command, so the help overlay lists it", () => {
+    const spec = COMMAND_SPECS.find((s) => s.id === "bar.open");
+    expect(spec?.keys).toEqual(["ctrl-k"]);
+    expect(spec?.scope).toBe("global");
+  });
+
+  it("lists sessions by recency under a kind header on an empty query", () => {
+    open();
+    expect([...document.querySelectorAll(".cmdbar-group-title")].map((h) => h.textContent)).toEqual([
+      "Sessions",
+    ]);
+    expect(rowNames()).toEqual(["api", "worker", "notes"]);
+    expect(activeName()).toBe("api");
+  });
+
+  it("ranks a typed query through the matcher and highlights the matched range", () => {
+    open();
+    type("wor");
+    expect(rowNames()).toEqual(["worker"]);
+    expect([...document.querySelectorAll(".cmdbar-row-name mark")].map((m) => m.textContent)).toEqual(
+      ["wor"],
+    );
+  });
+
+  it("highlights inside the directory when that is the field that matched", () => {
+    open();
+    type("dev/wor");
+    expect(rowNames()).toEqual(["worker"]);
+    expect(
+      [...document.querySelectorAll(".cmdbar-row-meta mark")].map((m) => m.textContent).join(""),
+    ).toBe("dev/wor");
+  });
+
+  it("renders a no-results state rather than an empty list", () => {
+    open();
+    type("zzz");
+    expect(rowNames()).toEqual([]);
+    expect(screen.getByText("No matches")).toBeDefined();
+  });
+
+  it("moves the highlight with the arrows and ctrl-p/ctrl-n, without wrapping", () => {
+    open();
+    press("ArrowUp");
+    expect(activeName()).toBe("api");
+    press("ArrowDown");
+    expect(activeName()).toBe("worker");
+    press("n", { ctrlKey: true });
+    expect(activeName()).toBe("notes");
+    press("ArrowDown");
+    expect(activeName()).toBe("notes");
+    press("p", { ctrlKey: true });
+    expect(activeName()).toBe("worker");
+  });
+
+  it("puts the highlight back on the best row whenever the query changes", () => {
+    open();
+    press("ArrowDown");
+    expect(activeName()).toBe("worker");
+    type("o");
+    expect(activeName()).toBe(rowNames()[0]);
+  });
+
+  it("opens the highlighted session through the caller's open path on Enter", () => {
+    const onOpenSession = vi.fn();
+    const onClose = vi.fn();
+    open({ onOpenSession, onClose });
+    press("ArrowDown");
+    press("Enter");
+    expect(onOpenSession).toHaveBeenCalledWith("worker");
+    expect(onClose).toHaveBeenCalled();
+  });
+
+  it("raises the shared select event when the caller supplies no handler", () => {
+    const listener = vi.fn();
+    document.addEventListener(SESSION_SELECT_EVENT, listener);
+    open({ onOpenSession: undefined });
+    press("Enter");
+    document.removeEventListener(SESSION_SELECT_EVENT, listener);
+    expect((listener.mock.calls[0][0] as CustomEvent).detail).toBe("api");
+  });
+
+  it("Enter on an empty result list does nothing", () => {
+    const onOpenSession = vi.fn();
+    const onClose = vi.fn();
+    open({ onOpenSession, onClose });
+    type("zzz");
+    press("Enter");
+    expect(onOpenSession).not.toHaveBeenCalled();
+    expect(onClose).not.toHaveBeenCalled();
+  });
+
+  it("closes on Escape and on a press outside the panel", () => {
+    const onClose = vi.fn();
+    open({ onClose });
+    press("Escape");
+    expect(onClose).toHaveBeenCalledTimes(1);
+    fireEvent.mouseDown(document.querySelector(".cmdbar-overlay") as HTMLElement);
+    expect(onClose).toHaveBeenCalledTimes(2);
+  });
+
+  it("stays open for a press inside the panel", () => {
+    const onClose = vi.fn();
+    open({ onClose });
+    fireEvent.mouseDown(document.querySelector(".cmdbar-panel") as HTMLElement);
+    expect(onClose).not.toHaveBeenCalled();
+  });
+
+  it("returns the keyboard to whatever held it when it opened", () => {
+    const before = document.createElement("input");
+    document.body.appendChild(before);
+    before.focus();
+    const view = open();
+    expect(document.activeElement).toBe(input());
+    view.unmount();
+    expect(document.activeElement).toBe(before);
+    before.remove();
+  });
+
+  it("clicking a row opens that session", () => {
+    const onOpenSession = vi.fn();
+    open({ onOpenSession });
+    fireEvent.click(document.querySelectorAll(".cmdbar-row")[1]);
+    expect(onOpenSession).toHaveBeenCalledWith("worker");
+  });
+});
+
+describe("the sigils", () => {
+  const commands = [
+    command({ id: "help.toggle", label: "Show help", keys: ["?"] }),
+    command({ id: "spawn.open", label: "Open the spawn form", keys: ["n"], run: vi.fn() }),
+  ];
+
+  it("lists every command in registry order under `>`, with its chord and no header", () => {
+    open({ commands });
+    type(">");
+    expect(rowNames()).toEqual(["Show help", "Open the spawn form"]);
+    expect(document.querySelectorAll(".cmdbar-group-title")).toHaveLength(0);
+    expect([...document.querySelectorAll(".cmdbar-row-keys kbd")].map((k) => k.textContent)).toEqual(
+      ["?", "n"],
+    );
+  });
+
+  it("matches a command on its label and never on its chord", () => {
+    open({ commands });
+    type(">help");
+    expect(rowNames()).toEqual(["Show help"]);
+    type(">?");
+    expect(rowNames()).toEqual([]);
+  });
+
+  it("runs the highlighted command on Enter", () => {
+    const run = vi.fn();
+    open({ commands: [command({ label: "Run me", run })] });
+    type(">run");
+    press("Enter");
+    expect(run).toHaveBeenCalled();
+  });
+
+  it("keeps the list mixed with no sigil, and returns to it when the sigil goes", () => {
+    open({ commands });
+    type(">show");
+    expect(rowNames()).toEqual(["Show help"]);
+    type("");
+    expect(rowNames()).toEqual(["api", "worker", "notes"]);
+  });
+
+  it("lists recent dirs then projects under `~`", async () => {
+    open({ loadDirectories: async () => ["/home/me/dev/api", "/srv/x"] });
+    type("~");
+    await waitFor(() => expect(rowNames()).toEqual(["~/dev/api", "/srv/x"]));
+    expect(document.querySelectorAll(".cmdbar-group-title")).toHaveLength(0);
+  });
+
+  it("fills the list in from /api/dirs as a path is typed", async () => {
+    const listDirEntries = vi.fn(async () => ["maestro", "api"]);
+    open({ loadDirectories: async () => ["/home/me/notes"], listDirEntries });
+    // The second `~` is a literal query character and reaches the matcher.
+    type("~~/dev/mae");
+    await waitFor(() => expect(rowNames()).toEqual(["~/dev/maestro"]));
+    expect(listDirEntries).toHaveBeenCalledWith("~/dev/");
+  });
+
+  it("spawns in the highlighted directory on Enter", async () => {
+    const onSpawnDirectory = vi.fn();
+    open({ loadDirectories: async () => ["/srv/x"], onSpawnDirectory });
+    type("~");
+    await waitFor(() => expect(rowNames()).toEqual(["/srv/x"]));
+    press("Enter");
+    expect(onSpawnDirectory).toHaveBeenCalledWith("/srv/x");
+  });
+
+  it("raises the spawn event when the caller supplies no handler", async () => {
+    const listener = vi.fn();
+    document.addEventListener(SPAWN_DIRECTORY_EVENT, listener);
+    open({ loadDirectories: async () => ["/srv/x"] });
+    type("~");
+    await waitFor(() => expect(rowNames()).toEqual(["/srv/x"]));
+    press("Enter");
+    document.removeEventListener(SPAWN_DIRECTORY_EVENT, listener);
+    expect((listener.mock.calls[0][0] as CustomEvent).detail).toBe("/srv/x");
+  });
+});
+
+describe("the session action page", () => {
+  function drill(over: Partial<CommandBarProps> = {}) {
+    const view = open(over);
+    press("Tab");
+    return view;
+  }
+
+  it("lists kill, rename and spawn similar for the highlighted session", () => {
+    drill();
+    expect(rowNames()).toEqual(["Kill session", "Rename session", "Spawn similar"]);
+  });
+
+  it("names the session being acted on", () => {
+    drill();
+    expect(screen.getByText('Actions for "api"')).toBeDefined();
+  });
+
+  it("drops the kind headers, since the page is one kind", () => {
+    drill();
+    expect(document.querySelectorAll(".cmdbar-group-title")).toHaveLength(0);
+  });
+
+  it("stays fuzzy-searchable over the three actions", () => {
+    drill();
+    type("ren");
+    expect(rowNames()).toEqual(["Rename session"]);
+  });
+
+  it("does nothing on a command row", () => {
+    open({ commands: [command({ label: "Show help" })] });
+    type(">show");
+    press("Tab");
+    expect(rowNames()).toEqual(["Show help"]);
+  });
+
+  it("does nothing on a directory row", async () => {
+    open({ loadDirectories: async () => ["/srv/x"] });
+    type("~");
+    await waitFor(() => expect(rowNames()).toEqual(["/srv/x"]));
+    press("Tab");
+    expect(rowNames()).toEqual(["/srv/x"]);
+  });
+
+  it("returns to the result list on Escape, with the previous query intact", () => {
+    const onClose = vi.fn();
+    open({ onClose });
+    type("wor");
+    press("Tab");
+    expect(rowNames()).toEqual(["Kill session", "Rename session", "Spawn similar"]);
+    press("Escape");
+    expect(onClose).not.toHaveBeenCalled();
+    expect(input().value).toBe("wor");
+    expect(rowNames()).toEqual(["worker"]);
+  });
+
+  it("returns to the result list on backspace at an empty query", () => {
+    drill();
+    fireEvent.keyDown(input(), { key: "Backspace" });
+    expect(rowNames()).toEqual(["api", "worker", "notes"]);
+  });
+
+  it("keeps backspace ordinary while the page's query has text", () => {
+    drill();
+    type("ren");
+    fireEvent.keyDown(input(), { key: "Backspace" });
+    expect(rowNames()).toEqual(["Rename session"]);
+  });
+
+  it("closes the bar when the page's Escape has already been used", () => {
+    const onClose = vi.fn();
+    drill({ onClose });
+    press("Escape");
+    press("Escape");
+    expect(onClose).toHaveBeenCalledTimes(1);
+  });
+
+  it("raises kill, rename and spawn similar with the session, closing the bar", () => {
+    for (const [query, key] of [
+      ["kill", "onKillSession"],
+      ["rename", "onRenameSession"],
+      ["spawn", "onSpawnSimilar"],
+    ] as const) {
+      const handler = vi.fn();
+      const onClose = vi.fn();
+      drill({ [key]: handler, onClose });
+      type(query);
+      press("Enter");
+      expect(handler).toHaveBeenCalledWith(expect.objectContaining({ id: "api" }));
+      expect(onClose).toHaveBeenCalled();
+      cleanup();
+    }
+  });
+
+  it("hands each action to the flow it already has, by default", () => {
+    for (const [query, event] of [
+      ["kill", KILL_SESSION_EVENT],
+      ["rename", RENAME_SESSION_EVENT],
+      ["spawn", SPAWN_SIMILAR_EVENT],
+    ] as const) {
+      const listener = vi.fn();
+      document.addEventListener(event, listener);
+      drill();
+      type(query);
+      press("Enter");
+      document.removeEventListener(event, listener);
+      expect((listener.mock.calls[0][0] as CustomEvent).detail.id).toBe("api");
+      cleanup();
+    }
+  });
+});

web/src/components/commandBar/CommandBar.tsx

@@ -0,0 +1,379 @@
+// The `ctrl-k` command bar (docs/COMMAND-BAR.md): a query line over a result
+// list. Sessions and commands rank together by default; `>` narrows to
+// commands, `~` to directories. `tab` on a session drills into its action page.
+//
+// The bar picks an action and hands off — it never reimplements one. Each
+// handler defaults to the event the flow that already implements it listens
+// on, so the React bar and the legacy shell raise the same flows.
+
+import { useCallback, useEffect, useMemo, useRef, useState } from "react";
+import { createPortal } from "react-dom";
+
+import {
+  KILL_SESSION_EVENT,
+  RENAME_SESSION_EVENT,
+  SESSION_SELECT_EVENT,
+  SPAWN_SIMILAR_EVENT,
+} from "../../catalog.js";
+import { publishedCommands, type Command } from "../../commands.js";
+import { sessionName, type Session } from "../../types.js";
+import { ActionPage } from "./ActionPage.js";
+import { ResultList } from "./ResultList.js";
+import {
+  barGroups,
+  barRows,
+  commandBarCandidates,
+  dirEntryPaths,
+  directoryBarCandidates,
+  isActionCandidate,
+  listDirEntries as defaultListDirEntries,
+  loadBarDirectories,
+  parseBarQuery,
+  probeDir,
+  sessionActionCandidates,
+  sessionBarCandidates,
+  PLACEHOLDERS,
+  type BarCandidate,
+  type BarResult,
+  type DirectoryBarCandidate,
+  type SessionAction,
+} from "./model.js";
+
+/** Raised when Enter lands on a directory row and no handler was given. The
+ *  bar picks the directory; the shell owns the spawn, which is the same
+ *  fast-forward path `N` takes. */
+export const SPAWN_DIRECTORY_EVENT = "cmdbar-spawn-directory";
+
+export interface CommandBarProps {
+  /** Sessions to build candidates from, as the store has them right now. */
+  sessions: readonly Session[];
+  /** The daemon's home dir, for the directory field's `~/…` abbreviation. */
+  homeDir?: string;
+  /** The command registry to list under `>`. Defaults to every bound command,
+   * in registry order. */
+  commands?: readonly Command[];
+  /** The directory list behind `~`, fetched once on first use. */
+  loadDirectories?: () => Promise<string[]>;
+  /** One directory's subdirectories, for filling the list in as a path is
+   * typed. Defaults to `GET /api/dirs`. */
+  listDirEntries?: (dir: string) => Promise<string[]>;
+  onOpenSession?(sessionId: string): void;
+  onSpawnDirectory?(path: string): void;
+  onKillSession?(session: Session): void;
+  onRenameSession?(session: Session): void;
+  onSpawnSimilar?(session: Session): void;
+  /** Closing returns the keyboard to whatever held it when the bar opened. */
+  onClose(): void;
+}
+
+function raise(name: string, detail: unknown): void {
+  document.dispatchEvent(new CustomEvent(name, { detail }));
+}
+
+export function CommandBar(props: CommandBarProps) {
+  const {
+    sessions,
+    homeDir,
+    commands,
+    loadDirectories = loadBarDirectories,
+    listDirEntries = defaultListDirEntries,
+    onClose,
+  } = props;
+
+  const inputRef = useRef<HTMLInputElement>(null);
+  const panelRef = useRef<HTMLDivElement>(null);
+
+  const [raw, setRaw] = useState("");
+  const [highlighted, setHighlighted] = useState(0);
+  // The action page: `page` is the session being acted on, `stashed` the
+  // result-list query it was drilled into from — backing out restores it, so
+  // the round trip costs the operator nothing.
+  const [page, setPage] = useState<Session | null>(null);
+  const [stashed, setStashed] = useState("");
+
+  // `~`'s candidates: the recents-and-projects list, fetched once, plus
+  // whatever `/api/dirs` has filled in for the directory being typed.
+  const [directories, setDirectories] = useState<DirectoryBarCandidate[]>([]);
+  const [probed, setProbed] = useState<DirectoryBarCandidate[]>([]);
+  const requestedRef = useRef(false);
+  const listingsRef = useRef(new Map<string, string[]>());
+
+  // On the action page the query line is over the three actions, so there is
+  // no sigil to read: `>` and `~` are ordinary characters there.
+  const parsed = useMemo(() => (page ? { sigil: null, query: raw } : parseBarQuery(raw)), [page, raw]);
+
+  const sessionCandidates = useMemo(
+    () => sessionBarCandidates(sessions, homeDir),
+    [sessions, homeDir],
+  );
+  const commandCandidates = useMemo(
+    () => commandBarCandidates(commands ?? publishedCommands()),
+    [commands],
+  );
+
+  // Closing returns the keyboard to whatever held it when the bar opened: a
+  // round trip through the bar never silently moves focus.
+  useEffect(() => {
+    const previouslyFocused = document.activeElement as HTMLElement | null;
+    inputRef.current?.focus();
+    return () => {
+      if (previouslyFocused?.isConnected) previouslyFocused.focus();
+    };
+  }, []);
+
+  // The recents-and-projects list, the first time `~` is used. No directories
+  // is a shorter list, not an error state.
+  useEffect(() => {
+    if (parsed.sigil !== "~" || requestedRef.current) return;
+    requestedRef.current = true;
+    let live = true;
+    loadDirectories()
+      .then((paths) => {
+        if (live) setDirectories(directoryBarCandidates(paths, homeDir));
+      })
+      .catch(() => {});
+    return () => {
+      live = false;
+    };
+  }, [parsed.sigil, loadDirectories, homeDir]);
+
+  // Fill the list in from `GET /api/dirs` once the query looks like a path: the
+  // directory it names is listed and its children join the candidates, so `~`
+  // reaches a directory that was never spawned in.
+  const dir = parsed.sigil === "~" ? probeDir(parsed.query) : "";
+  useEffect(() => {
+    if (dir === "") {
+      setProbed([]);
+      return;
+    }
+    const cached = listingsRef.current.get(dir);
+    if (cached) {
+      setProbed(directoryBarCandidates(dirEntryPaths(dir, cached), homeDir));
+      return;
+    }
+    let live = true;
+    setProbed([]);
+    listDirEntries(dir)
+      .then((entries) => {
+        listingsRef.current.set(dir, entries);
+        if (live) setProbed(directoryBarCandidates(dirEntryPaths(dir, entries), homeDir));
+      })
+      .catch(() => {
+        /* an unreadable directory contributes nothing */
+      });
+    return () => {
+      live = false;
+    };
+  }, [dir, listDirEntries, homeDir]);
+
+  /** What the matcher sees for the query line as it stands. With no sigil the
+   *  list is mixed — sessions and commands together — except on an empty query,
+   *  where the bar is a session switcher. */
+  const candidates: BarCandidate[] = useMemo(() => {
+    if (page) return sessionActionCandidates();
+    switch (parsed.sigil) {
+      case ">":
+        return [...commandCandidates];
+      case "~": {
+        const seen = new Set<string>();
+        return [...directories, ...probed].filter((c) =>
+          seen.has(c.path) ? false : (seen.add(c.path), true),
+        );
+      }
+      default:
+        return parsed.query === ""
+          ? [...sessionCandidates]
+          : [...sessionCandidates, ...commandCandidates];
+    }
+  }, [page, parsed.sigil, parsed.query, sessionCandidates, commandCandidates, directories, probed]);
+
+  const groups = useMemo(
+    () => barGroups(barRows(parsed.query, candidates)),
+    [parsed.query, candidates],
+  );
+  // Grouping is a rendering of the ranking, so the flattened groups are the
+  // rows in the order they appear — which is the order the highlight walks and
+  // Enter acts on.
+  const rows: BarResult[] = useMemo(() => groups.flatMap((g) => g.results), [groups]);
+
+  // The highlight starts on the globally best row every time the list changes:
+  // an old index would point at a different result.
+  useEffect(() => {
+    setHighlighted(0);
+  }, [rows]);
+
+  /** The highlight does not wrap: it stops at the first and last row. */
+  const move = useCallback(
+    (delta: number) => {
+      setHighlighted((at) => Math.min(rows.length - 1, Math.max(0, at + delta)));
+    },
+    [rows.length],
+  );
+
+  const runAction = useCallback(
+    (action: SessionAction, session: Session) => {
+      onClose();
+      switch (action.id) {
+        case "kill":
+          (props.onKillSession ?? ((s: Session) => raise(KILL_SESSION_EVENT, s)))(session);
+          return;
+        case "rename":
+          (props.onRenameSession ?? ((s: Session) => raise(RENAME_SESSION_EVENT, s)))(session);
+          return;
+        case "spawn-similar":
+          (props.onSpawnSimilar ?? ((s: Session) => raise(SPAWN_SIMILAR_EVENT, s)))(session);
+          return;
+      }
+    },
+    [onClose, props.onKillSession, props.onRenameSession, props.onSpawnSimilar],
+  );
+
+  const activate = useCallback(
+    (index: number) => {
+      const result = rows[index];
+      if (!result) return;
+      const candidate = result.candidate;
+      if (isActionCandidate(candidate)) {
+        // The page cannot be up without a session to act on.
+        if (page) runAction(candidate.action, page);
+        return;
+      }
+      onClose();
+      switch (candidate.kind) {
+        case "session":
+          (props.onOpenSession ?? ((id: string) => raise(SESSION_SELECT_EVENT, id)))(
+            candidate.session.id,
+          );
+          return;
+        case "command":
+          candidate.command.run();
+          return;
+        case "directory":
+          (props.onSpawnDirectory ?? ((p: string) => raise(SPAWN_DIRECTORY_EVENT, p)))(
+            candidate.path,
+          );
+          return;
+      }
+    },
+    [rows, page, runAction, onClose, props.onOpenSession, props.onSpawnDirectory],
+  );
+
+  /** `tab`: drill into the highlighted session's action page. No effect on any
+   *  other kind, and none on the page itself, which has no session rows. */
+  const drillIn = useCallback(() => {
+    const candidate = rows[highlighted]?.candidate;
+    if (page || candidate?.kind !== "session") return;
+    setPage(candidate.session);
+    setStashed(raw);
+    setRaw("");
+  }, [rows, highlighted, page, raw]);
+
+  /** Escape, or backspace at an empty query: back to the result list with the
+   *  query the drill-in was made from. */
+  const leavePage = useCallback(() => {
+    setPage(null);
+    setRaw(stashed);
+    setStashed("");
+  }, [stashed]);
+
+  const onKeyDown = (e: React.KeyboardEvent<HTMLInputElement>) => {
+    switch (e.key) {
+      case "Escape":
+        e.preventDefault();
+        // On an action page Escape is one level up, not the way out.
+        if (page) leavePage();
+        else onClose();
+        return;
+      case "Tab":
+        e.preventDefault();
+        drillIn();
+        return;
+      case "Backspace":
+        // Ordinary editing, except at an empty query on the action page.
+        if (page && raw === "") {
+          e.preventDefault();
+          leavePage();
+        }
+        return;
+      case "Enter":
+        e.preventDefault();
+        activate(highlighted);
+        return;
+      case "ArrowDown":
+        e.preventDefault();
+        move(1);
+        return;
+      case "ArrowUp":
+        e.preventDefault();
+        move(-1);
+        return;
+      case "n":
+        if (e.ctrlKey) {
+          e.preventDefault();
+          move(1);
+        }
+        return;
+      case "p":
+        if (e.ctrlKey) {
+          e.preventDefault();
+          move(-1);
+        }
+        return;
+    }
+  };
+
+  const activeRowId = rows.length > 0 ? `cmdbar-row-${highlighted}` : undefined;
+
+  return createPortal(
+    <div
+      className="cmdbar-overlay fixed inset-0 z-modal flex items-start justify-center bg-bg/70 pt-[12vh] backdrop-blur-sm max-[600px]:items-end max-[600px]:pt-0"
+      role="dialog"
+      aria-modal="true"
+      aria-label="Command bar"
+      onMouseDown={(e) => {
+        // A press on the scrim closes; one inside the panel is left alone.
+        if (!panelRef.current?.contains(e.target as Node)) onClose();
+      }}
+    >
+      <div
+        ref={panelRef}
+        className="cmdbar-panel flex w-full max-w-[560px] flex-col overflow-hidden rounded-r-3 border border-border bg-surface shadow-2 max-[600px]:max-w-none max-[600px]:rounded-b-none"
+      >
+        <input
+          ref={inputRef}
+          type="text"
+          role="combobox"
+          aria-expanded="true"
+          aria-controls="cmdbar-results"
+          aria-label="Search sessions, commands and directories"
+          aria-activedescendant={activeRowId}
+          autoComplete="off"
+          spellCheck={false}
+          className="cmdbar-input w-full border-b border-border bg-transparent px-sp-3 py-sp-2 text-fs-15 text-ink outline-none"
+          placeholder={page ? `Act on ${sessionName(page)}…` : PLACEHOLDERS[parsed.sigil ?? "mixed"]}
+          value={raw}
+          onChange={(e) => setRaw(e.currentTarget.value)}
+          onKeyDown={onKeyDown}
+        />
+        {page ? (
+          <ActionPage
+            session={page}
+            groups={groups}
+            highlighted={highlighted}
+            onActivate={activate}
+          />
+        ) : (
+          <ResultList
+            groups={groups}
+            // While a sigil is in force there is one kind, so the header is
+            // dropped.
+            showHeaders={parsed.sigil === null}
+            highlighted={highlighted}
+            onActivate={activate}
+          />
+        )}
+      </div>
+    </div>,
+    document.body,
+  );
+}

web/src/components/commandBar/ResultList.tsx

@@ -0,0 +1,171 @@
+// The bar's result list: kind headers over rank-ordered rows
+// (docs/COMMAND-BAR.md, "Structure"). Headers are labels, never rows — the
+// highlight walks the rows alone, in the order they are rendered.
+
+import { useEffect, useRef } from "react";
+
+import { keyCaps } from "../../commands.js";
+import {
+  highlightSegments,
+  isActionCandidate,
+  metaText,
+  rowName,
+  type BarGroup,
+  type BarResult,
+} from "./model.js";
+
+export interface ResultListProps {
+  groups: BarGroup[];
+  /** Dropped while a sigil is in force or on the action page: one kind needs
+   * no header. */
+  showHeaders: boolean;
+  /** Index into the flattened rows, in the order they render. */
+  highlighted: number;
+  onActivate(index: number): void;
+}
+
+function Highlighted({ text, ranges }: { text: string; ranges: BarResult["ranges"] }) {
+  return (
+    <>
+      {highlightSegments(text, ranges).map((segment, i) =>
+        segment.hit ? (
+          <mark key={i} className="cmdbar-hit bg-transparent font-semibold text-accent">
+            {segment.text}
+          </mark>
+        ) : (
+          <span key={i}>{segment.text}</span>
+        ),
+      )}
+    </>
+  );
+}
+
+function Row({
+  result,
+  index,
+  active,
+  onActivate,
+}: {
+  result: BarResult;
+  index: number;
+  active: boolean;
+  onActivate(index: number): void;
+}) {
+  const ref = useRef<HTMLDivElement>(null);
+  const candidate = result.candidate;
+
+  useEffect(() => {
+    if (active) ref.current?.scrollIntoView({ block: "nearest" });
+  }, [active]);
+
+  const name = rowName(candidate);
+  const nameMatched =
+    result.field === "name" || result.field === "label" || result.field === "path";
+  const meta = metaText(result);
+  const dead = candidate.kind === "session" && candidate.session.status === "Dead";
+  const chord =
+    candidate.kind === "command" && !isActionCandidate(candidate)
+      ? candidate.command.keys[0]
+      : undefined;
+
+  return (
+    <div
+      ref={ref}
+      role="option"
+      id={`cmdbar-row-${index}`}
+      aria-selected={active}
+      data-index={index}
+      data-kind={candidate.kind}
+      data-session-id={candidate.kind === "session" ? candidate.session.id : undefined}
+      data-action-id={isActionCandidate(candidate) ? candidate.action.id : undefined}
+      data-command-id={
+        candidate.kind === "command" && !isActionCandidate(candidate)
+          ? candidate.command.id
+          : undefined
+      }
+      data-path={candidate.kind === "directory" ? candidate.path : undefined}
+      className={[
+        "cmdbar-row flex cursor-pointer items-baseline gap-sp-2 rounded-r-1 px-sp-3 py-sp-1 text-fs-13",
+        active ? "is-active bg-surface-2 text-ink" : "text-ink",
+        dead ? "is-dead opacity-60" : "",
+      ]
+        .filter(Boolean)
+        .join(" ")}
+      onClick={() => onActivate(index)}
+    >
+      <span className="cmdbar-row-name truncate">
+        {nameMatched ? <Highlighted text={name} ranges={result.ranges} /> : name}
+      </span>
+      {chord !== undefined ? (
+        <span className="cmdbar-row-keys ml-auto flex gap-1">
+          {keyCaps(chord).map((cap, i) => (
+            <kbd
+              key={i}
+              className="rounded-r-1 border border-border px-1 text-fs-11 text-muted"
+            >
+              {cap}
+            </kbd>
+          ))}
+        </span>
+      ) : meta ? (
+        <span className="cmdbar-row-meta ml-auto truncate text-fs-11 text-muted">
+          {result.field !== undefined && result.field !== "name" ? (
+            <Highlighted text={meta} ranges={result.ranges} />
+          ) : (
+            meta
+          )}
+        </span>
+      ) : null}
+    </div>
+  );
+}
+
+export function ResultList({ groups, showHeaders, highlighted, onActivate }: ResultListProps) {
+  if (groups.length === 0) {
+    return (
+      <div
+        id="cmdbar-results"
+        role="listbox"
+        aria-label="Results"
+        className="cmdbar-results max-h-[50vh] overflow-auto p-sp-1"
+      >
+        <div className="cmdbar-empty px-sp-3 py-sp-2 text-fs-12 text-muted">No matches</div>
+      </div>
+    );
+  }
+
+  let index = 0;
+  return (
+    <div
+      id="cmdbar-results"
+      role="listbox"
+      aria-label="Results"
+      className="cmdbar-results max-h-[50vh] overflow-auto p-sp-1"
+    >
+      {groups.map((group) => (
+        <div key={group.kind}>
+          {showHeaders ? (
+            <div
+              role="presentation"
+              className="cmdbar-group-title px-sp-3 pt-sp-2 pb-1 text-fs-11 uppercase tracking-wide text-muted"
+            >
+              {group.title}
+            </div>
+          ) : null}
+          {group.results.map((result) => {
+            const at = index++;
+            return (
+              <Row
+                key={at}
+                result={result}
+                index={at}
+                active={at === highlighted}
+                onActivate={onActivate}
+              />
+            );
+          })}
+        </div>
+      ))}
+    </div>
+  );
+}

web/src/components/commandBar/index.ts

@@ -0,0 +1,5 @@
+export { CommandBar, SPAWN_DIRECTORY_EVENT, type CommandBarProps } from "./CommandBar.js";
+export { ResultList, type ResultListProps } from "./ResultList.js";
+export { ActionPage, type ActionPageProps } from "./ActionPage.js";
+export { useCommandBar, type CommandBarControls, type UseCommandBarOptions } from "./useCommandBar.js";
+export * from "./model.js";

web/src/components/commandBar/model.test.ts

@@ -0,0 +1,197 @@
+import { describe, expect, it } from "vitest";
+
+import type { Command } from "../../commands.js";
+import type { Session } from "../../types.js";
+import {
+  barGroups,
+  barRows,
+  commandBarCandidates,
+  dedupeCommands,
+  directoryBarCandidates,
+  directoryCandidate,
+  highlightSegments,
+  orderSessionsForBar,
+  parseBarQuery,
+  sessionActionCandidates,
+  sessionBarCandidates,
+  sessionCandidate,
+} from "./model.js";
+
+function session(id: string, over: Partial<Session> = {}): Session {
+  return {
+    id,
+    cwd: "/home/me/dev/api",
+    command: "bash",
+    env: {},
+    metadata: { name: id },
+    status: "Running",
+    created_at: "2026-01-01T00:00:00Z",
+    ...over,
+  };
+}
+
+function command(over: Partial<Command> = {}): Command {
+  return {
+    id: "a",
+    label: "A command",
+    group: "Test",
+    keys: ["a"],
+    scope: "global",
+    run: () => {},
+    ...over,
+  };
+}
+
+describe("empty-query ordering", () => {
+  it("sorts most recently focused first", () => {
+    const older = session("older", { last_focused_at: "2026-01-01T10:00:00Z" });
+    const newer = session("newer", { last_focused_at: "2026-01-01T11:00:00Z" });
+    expect(orderSessionsForBar([older, newer]).map((s) => s.id)).toEqual(["newer", "older"]);
+  });
+
+  it("sorts a never-focused session after every focused one, newest created first", () => {
+    const focused = session("focused", { last_focused_at: "2026-01-01T09:00:00Z" });
+    const old = session("old", { created_at: "2026-01-01T00:00:00Z" });
+    const fresh = session("fresh", { created_at: "2026-01-02T00:00:00Z" });
+    expect(orderSessionsForBar([old, fresh, focused]).map((s) => s.id)).toEqual([
+      "focused",
+      "fresh",
+      "old",
+    ]);
+  });
+
+  it("sorts dead sessions after live ones regardless of recency", () => {
+    const dead = session("dead", { status: "Dead", last_focused_at: "2026-01-01T12:00:00Z" });
+    const live = session("live", { last_focused_at: "2026-01-01T10:00:00Z" });
+    expect(orderSessionsForBar([dead, live]).map((s) => s.id)).toEqual(["live", "dead"]);
+  });
+
+  it("treats an empty last_focused_at as never focused", () => {
+    const blank = session("blank", { last_focused_at: "" });
+    const focused = session("focused", { last_focused_at: "2026-01-01T10:00:00Z" });
+    expect(orderSessionsForBar([blank, focused]).map((s) => s.id)).toEqual(["focused", "blank"]);
+  });
+});
+
+describe("session candidates", () => {
+  it("carries the candidate table's fields, with the directory abbreviated", () => {
+    const s = session("api", {
+      metadata: { name: "api" },
+      current_cwd: "/home/me/dev/api",
+      command: "claude --resume",
+    });
+    expect(sessionCandidate(s, "/home/me").fields).toEqual({
+      name: "api",
+      directory: "~/dev/api",
+      command: "claude --resume",
+      tool: "claude",
+    });
+  });
+
+  it("leaves the tool out when the program has no mark, and groups a worktree by its repo", () => {
+    const s = session("edit", {
+      metadata: {},
+      command: "hx src/",
+      worktree: { path: "/home/me/dev/api/wt/x", base_repo: "/home/me/dev/api" },
+    });
+    const candidate = sessionCandidate(s, "/home/me");
+    expect(candidate.fields.tool).toBeUndefined();
+    expect(candidate.fields.directory).toBe("~/dev/api");
+    // No `metadata.name`: the sidebar's fallback is the command line.
+    expect(candidate.fields.name).toBe("hx src/");
+  });
+
+  it("builds candidates in the empty-query order", () => {
+    const a = session("a", { last_focused_at: "2026-01-01T10:00:00Z" });
+    const b = session("b", { last_focused_at: "2026-01-01T11:00:00Z" });
+    expect(sessionBarCandidates([a, b]).map((c) => c.session.id)).toEqual(["b", "a"]);
+  });
+});
+
+describe("rows and grouping", () => {
+  it("an empty query keeps every candidate in input order", () => {
+    const candidates = sessionBarCandidates([session("a"), session("b")]);
+    expect(barRows("", candidates).map((r) => r.score)).toEqual([0, 0]);
+  });
+
+  it("groups by kind without reordering the ranking", () => {
+    const rows = barRows("kill", [
+      ...sessionBarCandidates([session("killer-app", { metadata: { name: "killer-app" } })]),
+      ...commandBarCandidates([command({ label: "Kill selected session" })]),
+    ]);
+    const groups = barGroups(rows);
+    expect(groups.map((g) => g.title)).toEqual(["Sessions", "Commands"]);
+    expect(groups.flatMap((g) => g.results)).toEqual(rows);
+  });
+});
+
+describe("parsing the query line", () => {
+  it("reads a sigil only in first position", () => {
+    expect(parseBarQuery(">help")).toEqual({ sigil: ">", query: "help" });
+    expect(parseBarQuery("~dev")).toEqual({ sigil: "~", query: "dev" });
+  });
+
+  it("leaves a sigil character elsewhere in the query literal", () => {
+    expect(parseBarQuery("~dev/~scratch")).toEqual({ sigil: "~", query: "dev/~scratch" });
+    expect(parseBarQuery("a>b")).toEqual({ sigil: null, query: "a>b" });
+  });
+
+  it("returns to the mixed list when the sigil is backspaced away", () => {
+    expect(parseBarQuery("")).toEqual({ sigil: null, query: "" });
+  });
+});
+
+describe("command candidates", () => {
+  it("dedupes by action, not by chord", () => {
+    const run = () => {};
+    const cmds = [
+      command({ id: "one", label: "Do it", keys: ["j"], run }),
+      command({ id: "two", label: "Do it", keys: ["down"], run }),
+    ];
+    expect(commandBarCandidates(cmds)).toHaveLength(1);
+    expect(dedupeCommands(cmds)).toHaveLength(1);
+  });
+
+  it("matches on the label only, never on the chord", () => {
+    const candidates = commandBarCandidates([command({ label: "Show help", keys: ["ctrl-q"] })]);
+    expect(barRows("ctrlq", candidates)).toEqual([]);
+    expect(barRows("show", candidates)).toHaveLength(1);
+  });
+});
+
+describe("directory candidates", () => {
+  it("abbreviates the path it shows and keeps the one it spawns in", () => {
+    const candidate = directoryCandidate("/home/me/dev/api", "/home/me");
+    expect(candidate.fields.path).toBe("~/dev/api");
+    expect(candidate.path).toBe("/home/me/dev/api");
+  });
+
+  it("expands a typed `~` and dedupes by the directory spawned in", () => {
+    const candidates = directoryBarCandidates(
+      ["~/dev/api", "/home/me/dev/api", "", "/srv/x"],
+      "/home/me",
+    );
+    expect(candidates.map((c) => c.path)).toEqual(["/home/me/dev/api", "/srv/x"]);
+  });
+});
+
+describe("the action page's candidates", () => {
+  it("offers no action beyond the three", () => {
+    expect(sessionActionCandidates().map((c) => c.action.id)).toEqual([
+      "kill",
+      "rename",
+      "spawn-similar",
+    ]);
+  });
+});
+
+describe("highlight segments", () => {
+  it("splits the text on the matcher's ranges", () => {
+    expect(highlightSegments("web-search", [[0, 1], [4, 5]])).toEqual([
+      { text: "w", hit: true },
+      { text: "eb-", hit: false },
+      { text: "s", hit: true },
+      { text: "earch", hit: false },
+    ]);
+  });
+});

web/src/components/commandBar/model.ts

@@ -0,0 +1,366 @@
+// The command bar's pure model (docs/COMMAND-BAR.md), lifted from
+// ../../commandBar.ts for the React port (#247): what a candidate is, the
+// order an empty query lists them in, how a query line splits into a sigil and
+// a query, and how a ranked list groups for rendering.
+//
+// Nothing here touches the DOM or the network apart from `loadBarDirectories`,
+// which is the one place the `~` list comes from.
+
+import { listDir, projects as fetchProjects, recentDirs } from "../../api.js";
+import type { Command } from "../../commands.js";
+import { splitPath } from "../../paths.js";
+import { splitCommand } from "../../toolIcon.js";
+import { abbreviateCwd, sessionName, sessionTreePath, type Session } from "../../types.js";
+import {
+  matchAndRank,
+  type CandidateKind,
+  type CommandCandidate,
+  type DirectoryCandidate,
+  type MatchRange,
+  type MatchResult,
+  type SessionCandidate,
+} from "../../utils/matcher.js";
+
+/** A matcher candidate that remembers what it came from, so a result can be
+ *  acted on without a second lookup. The extra property is invisible to the
+ *  matcher, which only ever reads `kind` and `fields`. */
+export type SessionBarCandidate = SessionCandidate & { session: Session };
+export type CommandBarCandidate = CommandCandidate & { command: Command };
+/** `fields.path` is the abbreviated path the operator reads and the matcher
+ *  ranks; `path` is the one a spawn is made in. */
+export type DirectoryBarCandidate = DirectoryCandidate & { path: string };
+
+/** One row of a session's action page. It is a `command` to the matcher — a
+ *  single `label` field, ranked exactly like a registry command — and carries
+ *  the action it stands for instead of a registry entry. */
+export type ActionBarCandidate = CommandCandidate & { action: SessionAction };
+
+export type BarCandidate =
+  | SessionBarCandidate
+  | CommandBarCandidate
+  | ActionBarCandidate
+  | DirectoryBarCandidate;
+export type BarResult = MatchResult<BarCandidate>;
+
+/** One kind's slice of the ranked list, in rank order. */
+export interface BarGroup<C extends BarCandidate = BarCandidate> {
+  kind: CandidateKind;
+  title: string;
+  results: MatchResult<C>[];
+}
+
+const KIND_TITLES: Record<CandidateKind, string> = {
+  session: "Sessions",
+  command: "Commands",
+  directory: "Directories",
+};
+
+// ---- the sigils ----
+
+export type BarSigil = ">" | "~";
+
+export interface BarQuery {
+  /** The sigil in force, or null for the mixed list. */
+  sigil: BarSigil | null;
+  /** What the matcher sees: everything after a sigil, or the whole query. */
+  query: string;
+}
+
+export const PLACEHOLDERS: Record<"mixed" | BarSigil, string> = {
+  mixed: "Go to a session…",
+  ">": "Run a command…",
+  "~": "Spawn in a directory…",
+};
+
+/** Split a raw query line into its sigil and the query proper.
+ *
+ *  A sigil is only a sigil in first position: `>` or `~` anywhere else is a
+ *  literal query character, which is what a directory query with a second `~`
+ *  in it depends on. Backspacing past a sigil needs no special case either —
+ *  the first character goes and the query is a mixed one again. */
+export function parseBarQuery(raw: string): BarQuery {
+  const first = raw[0];
+  if (first === ">" || first === "~") return { sigil: first, query: raw.slice(1) };
+  return { sigil: null, query: raw };
+}
+
+// ---- the session action page ----
+
+/** The actions a session's action page offers, and no others: the bar picks
+ *  one and hands off to the flow that already implements it
+ *  (docs/COMMAND-BAR.md, "Drill-in"). */
+export type SessionActionId = "kill" | "rename" | "spawn-similar";
+
+export interface SessionAction {
+  id: SessionActionId;
+  label: string;
+}
+
+export const SESSION_ACTIONS: readonly SessionAction[] = [
+  { id: "kill", label: "Kill session" },
+  { id: "rename", label: "Rename session" },
+  { id: "spawn-similar", label: "Spawn similar" },
+];
+
+/** The action page's candidates, in the order above — which is the order an
+ *  empty query lists them in, since the matcher keeps input order. */
+export function sessionActionCandidates(): ActionBarCandidate[] {
+  return SESSION_ACTIONS.map((action) => ({
+    kind: "command",
+    action,
+    fields: { label: action.label },
+  }));
+}
+
+/** Narrow a `command` candidate to an action row. Both share the matcher's
+ *  `command` kind, so what separates them is what they carry. */
+export function isActionCandidate(candidate: BarCandidate): candidate is ActionBarCandidate {
+  return candidate.kind === "command" && "action" in candidate;
+}
+
+// ---- candidates ----
+
+function focusedAt(s: Session): number | null {
+  const stamp = s.last_focused_at;
+  if (typeof stamp !== "string" || stamp === "") return null;
+  const ms = Date.parse(stamp);
+  return Number.isNaN(ms) ? null : ms;
+}
+
+function createdAt(s: Session): number {
+  const ms = Date.parse(s.created_at ?? "");
+  return Number.isNaN(ms) ? 0 : ms;
+}
+
+/** The empty-query order (docs/COMMAND-BAR.md, "Empty query"): most recently
+ *  focused first; a session that has never been focused sorts after every
+ *  session that has, most recently created first among those; and a dead
+ *  session sorts after every live one regardless of recency, because a session
+ *  you cannot attach to is not where you just were.
+ *
+ *  This is also the input order for a non-empty query, which is what the
+ *  matcher's last tie-break preserves. */
+export function orderSessionsForBar(sessions: readonly Session[]): Session[] {
+  return [...sessions].sort((a, b) => {
+    const deadA = a.status === "Dead" ? 1 : 0;
+    const deadB = b.status === "Dead" ? 1 : 0;
+    if (deadA !== deadB) return deadA - deadB;
+
+    const focusA = focusedAt(a);
+    const focusB = focusedAt(b);
+    if ((focusA === null) !== (focusB === null)) return focusA === null ? 1 : -1;
+    if (focusA !== null && focusB !== null && focusA !== focusB) return focusB - focusA;
+
+    return createdAt(b) - createdAt(a);
+  });
+}
+
+/** Build one session's candidate: the fields docs/COMMAND-BAR.md's candidate
+ *  table names, with the directory abbreviated the way the sidebar shows it. */
+export function sessionCandidate(s: Session, homeDir?: string): SessionBarCandidate {
+  const treePath = sessionTreePath(s);
+  const directory = treePath ? abbreviateCwd(treePath, homeDir) : undefined;
+  const tool = splitCommand(s.command).tool ?? undefined;
+  return {
+    kind: "session",
+    session: s,
+    fields: {
+      name: sessionName(s),
+      ...(directory ? { directory } : {}),
+      ...(s.command ? { command: s.command } : {}),
+      ...(tool ? { tool } : {}),
+    },
+  };
+}
+
+/** Every session as a candidate, in the empty-query order. */
+export function sessionBarCandidates(
+  sessions: readonly Session[],
+  homeDir?: string,
+): SessionBarCandidate[] {
+  return orderSessionsForBar(sessions).map((s) => sessionCandidate(s, homeDir));
+}
+
+/** Drop the commands that would list twice. Several chords can be bound to one
+ *  action — the registry already carries its aliases on one entry, but nothing
+ *  stops two entries running the same handler, and listed naively that is two
+ *  identical rows. The dedupe is by **action**, never by chord: the chord is
+ *  displayed, so a command with two of them is still one row. */
+export function dedupeCommands(commands: readonly Command[]): Command[] {
+  const seenRun = new Set<Command["run"]>();
+  const seenLabel = new Set<string>();
+  const kept: Command[] = [];
+  for (const command of commands) {
+    if (seenRun.has(command.run) || seenLabel.has(command.label)) continue;
+    seenRun.add(command.run);
+    seenLabel.add(command.label);
+    kept.push(command);
+  }
+  return kept;
+}
+
+/** Every bound command as a candidate, in registry order. Only the label is a
+ *  field: the chord is displayed beside the row, never matched, because
+ *  matching it would make `>` results depend on a user's rebinds. */
+export function commandBarCandidates(commands: readonly Command[]): CommandBarCandidate[] {
+  return dedupeCommands(commands).map((command) => ({
+    kind: "command",
+    command,
+    fields: { label: command.label },
+  }));
+}
+
+/** `~/dev/api` back to `/home/me/dev/api` — the inverse of `abbreviateCwd`, for
+ *  a path the operator typed or `/api/dirs` completed. */
+export function expandHome(path: string, homeDir?: string): string {
+  if (!homeDir) return path;
+  if (path === "~") return homeDir;
+  return path.startsWith("~/") ? `${homeDir}${path.slice(1)}` : path;
+}
+
+export function directoryCandidate(path: string, homeDir?: string): DirectoryBarCandidate {
+  const absolute = expandHome(path, homeDir);
+  return { kind: "directory", path: absolute, fields: { path: abbreviateCwd(absolute, homeDir) } };
+}
+
+/** Candidates for `~`, deduped by the directory they spawn in and keeping the
+ *  first mention of each — recent dirs (newest first) ahead of the project
+ *  list, which is the empty-query order the contract asks for. */
+export function directoryBarCandidates(
+  paths: readonly string[],
+  homeDir?: string,
+): DirectoryBarCandidate[] {
+  const seen = new Set<string>();
+  const out: DirectoryBarCandidate[] = [];
+  for (const path of paths) {
+    if (path === "") continue;
+    const candidate = directoryCandidate(path, homeDir);
+    if (seen.has(candidate.path)) continue;
+    seen.add(candidate.path);
+    out.push(candidate);
+  }
+  return out;
+}
+
+/** The directory list the bar starts from: what the spawn form already knows —
+ *  `GET /api/recent-dirs` and the project list — either alone if the other
+ *  fails. */
+export async function loadBarDirectories(): Promise<string[]> {
+  const [recents, discovered] = await Promise.all([
+    recentDirs()
+      .then((r) => r.dirs.map((d) => d.cwd))
+      .catch(() => [] as string[]),
+    fetchProjects()
+      .then((list) => list.map((p) => p.path))
+      .catch(() => [] as string[]),
+  ]);
+  return [...recents, ...discovered];
+}
+
+/** One directory's children as candidate paths, for filling the `~` list in as
+ *  a path is typed. The directory being listed comes from the query itself. */
+export function dirEntryPaths(dir: string, entries: readonly string[]): string[] {
+  return entries.map((entry) => `${dir}${entry}`);
+}
+
+/** The directory a `~` query names, or `""` when it names none yet. */
+export function probeDir(query: string): string {
+  return splitPath(query).dir;
+}
+
+/** `GET /api/dirs`, in the shape the bar wants it. */
+export function listDirEntries(dir: string): Promise<string[]> {
+  return listDir(dir).then((listing) => listing.entries);
+}
+
+// ---- grouping ----
+
+/** Bucket a ranked list by kind for rendering. Grouping is a rendering of the
+ *  ranking, never a reordering of it: a group holds its matches in rank order,
+ *  and groups appear in the order their best-scoring member does — so the first
+ *  row under the first header is the globally best result. */
+export function barGroups<C extends BarCandidate>(
+  results: readonly MatchResult<C>[],
+): BarGroup<C>[] {
+  const groups: BarGroup<C>[] = [];
+  for (const result of results) {
+    const kind = result.candidate.kind;
+    let group = groups.find((g) => g.kind === kind);
+    if (!group) {
+      group = { kind, title: KIND_TITLES[kind], results: [] };
+      groups.push(group);
+    }
+    group.results.push(result);
+  }
+  return groups;
+}
+
+/** The rows a query produces, flat and in rank order — what the highlight walks
+ *  and what Enter acts on. Headers are labels, not rows, so they are never in
+ *  this list. */
+export function barRows<C extends BarCandidate>(
+  query: string,
+  candidates: readonly C[],
+): MatchResult<C>[] {
+  return matchAndRank(query, candidates);
+}
+
+// ---- row text ----
+
+/** The name line of a row: the session's name, the command's label, or the
+ *  directory's path. */
+export function rowName(candidate: BarCandidate): string {
+  switch (candidate.kind) {
+    case "session":
+      return candidate.fields.name;
+    case "command":
+      return candidate.fields.label;
+    case "directory":
+      return candidate.fields.path;
+  }
+}
+
+/** The secondary line under a session row: the field the match was found in
+ *  when that was not the name, so a session found through its directory says
+ *  so. Only sessions have one — a command shows keycaps instead, and a
+ *  directory's path is already the name. */
+export function metaText(result: BarResult): string | undefined {
+  if (result.candidate.kind !== "session") return undefined;
+  const fields = result.candidate.fields;
+  switch (result.field) {
+    case "directory":
+      return fields.directory;
+    case "command":
+      return fields.command;
+    case "tool":
+      return fields.tool;
+    default:
+      return fields.directory;
+  }
+}
+
+/** One run of a row's text, flagged when the matcher matched inside it. The
+ *  React rendering of `renderHighlighted`: ranges come from the matcher as
+ *  `[start, end)` character pairs over the field that won. */
+export interface HighlightSegment {
+  text: string;
+  hit: boolean;
+}
+
+export function highlightSegments(
+  text: string,
+  ranges: readonly MatchRange[],
+): HighlightSegment[] {
+  const out: HighlightSegment[] = [];
+  let cursor = 0;
+  for (const [start, end] of ranges) {
+    if (start > cursor) out.push({ text: text.slice(cursor, start), hit: false });
+    out.push({ text: text.slice(start, end), hit: true });
+    cursor = end;
+  }
+  if (cursor < text.length) out.push({ text: text.slice(cursor), hit: false });
+  return out;
+}
+
+export { sessionName };
+export type { CandidateKind, MatchRange, MatchResult };

web/src/components/commandBar/useCommandBar.test.tsx

@@ -0,0 +1,76 @@
+// @vitest-environment happy-dom
+import { act, cleanup, render } from "@testing-library/react";
+import { afterEach, describe, expect, it, vi } from "vitest";
+
+import { OPEN_COMMAND_BAR_EVENT } from "../../catalog.js";
+import { useCommandBar, type UseCommandBarOptions } from "./useCommandBar.js";
+
+let controls: ReturnType<typeof useCommandBar>;
+
+function Probe(opts: UseCommandBarOptions) {
+  controls = useCommandBar(opts);
+  return <div>{controls.open ? "open" : "closed"}</div>;
+}
+
+function ctrlK(target: EventTarget = window): void {
+  act(() => {
+    target.dispatchEvent(
+      new KeyboardEvent("keydown", { key: "k", ctrlKey: true, bubbles: true, cancelable: true }),
+    );
+  });
+}
+
+afterEach(cleanup);
+
+describe("useCommandBar", () => {
+  it("opens on ctrl-k, from the capture phase so an attached xterm never sees it", () => {
+    const view = render(<Probe />);
+    ctrlK();
+    expect(view.container.textContent).toBe("open");
+  });
+
+  it("stays deaf while the bar is already up — its own input owns the keys", () => {
+    const onOpen = vi.fn();
+    render(<Probe onOpen={onOpen} />);
+    ctrlK();
+    ctrlK();
+    expect(onOpen).toHaveBeenCalledTimes(1);
+  });
+
+  it("leaves a form field's own Ctrl-K alone", () => {
+    const field = document.createElement("input");
+    document.body.appendChild(field);
+    const view = render(<Probe />);
+    ctrlK(field);
+    expect(view.container.textContent).toBe("closed");
+    field.remove();
+  });
+
+  it("opens from the sidebar's search field, the touch entry point", () => {
+    const view = render(<Probe />);
+    act(() => {
+      document.dispatchEvent(new CustomEvent(OPEN_COMMAND_BAR_EVENT));
+    });
+    expect(view.container.textContent).toBe("open");
+  });
+
+  it("runs the caller's hook before opening, so a preview is discarded first", () => {
+    const onOpen = vi.fn();
+    render(<Probe onOpen={onOpen} />);
+    ctrlK();
+    expect(onOpen).toHaveBeenCalledTimes(1);
+  });
+
+  it("closes on demand", () => {
+    const view = render(<Probe />);
+    ctrlK();
+    act(() => controls.closeBar());
+    expect(view.container.textContent).toBe("closed");
+  });
+
+  it("binds nothing while disabled — another overlay owns the keyboard", () => {
+    const view = render(<Probe enabled={false} />);
+    ctrlK();
+    expect(view.container.textContent).toBe("closed");
+  });
+});

web/src/components/commandBar/useCommandBar.ts

@@ -0,0 +1,65 @@
+// Opening and closing the bar (docs/COMMAND-BAR.md, "Opening"). `ctrl-k` is a
+// registry command like any other, so the `?` overlay lists it without a
+// second list; the touch entry point — the sidebar's search field — raises
+// `OPEN_COMMAND_BAR_EVENT` and lands on the same open.
+
+import { useCallback, useEffect, useState } from "react";
+
+import { OPEN_COMMAND_BAR_EVENT } from "../../catalog.js";
+import { CommandSet, defineCommands, isBarTypingTarget } from "../../commands.js";
+
+export interface UseCommandBarOptions {
+  /** Run before the bar opens — the shell discards a preview here, since the
+   * bar is not previewed into (docs/PREVIEW.md). */
+  onOpen?(): void;
+  /** Off while another overlay owns the keyboard (the restart overlay, the
+   * help dialog). Defaults to on. */
+  enabled?: boolean;
+}
+
+export interface CommandBarControls {
+  open: boolean;
+  openBar(): void;
+  closeBar(): void;
+}
+
+export function useCommandBar(opts: UseCommandBarOptions = {}): CommandBarControls {
+  const { onOpen, enabled = true } = opts;
+  const [open, setOpen] = useState(false);
+
+  const openBar = useCallback(() => {
+    onOpen?.();
+    setOpen(true);
+  }, [onOpen]);
+
+  const closeBar = useCallback(() => setOpen(false), []);
+
+  useEffect(() => {
+    if (!enabled) return;
+    const keys = new CommandSet(defineCommands({ "bar.open": openBar }));
+
+    // Capture phase: an attached xterm swallows every keystroke it is given, so
+    // the bar's binding has to be seen ahead of the terminal.
+    const onKeydown = (e: KeyboardEvent) => {
+      // The bar owns the keyboard while it is up; its own input handles the keys.
+      if (open) return;
+      // The pane's hidden textarea is not a typing target for the bar: ctrl-k
+      // is seen ahead of xterm and opens the bar. A real form field — the spawn
+      // form's inputs — keeps its own Ctrl+K.
+      if (isBarTypingTarget(e.target)) return;
+      keys.handle(e);
+    };
+    const onTouchEntry = () => {
+      if (!open) openBar();
+    };
+
+    window.addEventListener("keydown", onKeydown, true);
+    document.addEventListener(OPEN_COMMAND_BAR_EVENT, onTouchEntry);
+    return () => {
+      window.removeEventListener("keydown", onKeydown, true);
+      document.removeEventListener(OPEN_COMMAND_BAR_EVENT, onTouchEntry);
+    };
+  }, [enabled, open, openBar]);
+
+  return { open, openBar, closeBar };
+}

web/src/components/common/ContextMenu.test.tsx

@@ -0,0 +1,68 @@
+// @vitest-environment happy-dom
+import { cleanup, fireEvent, render, screen } from "@testing-library/react";
+import { afterEach, describe, expect, it, vi } from "vitest";
+
+import { ContextMenu } from "./ContextMenu.js";
+
+afterEach(() => {
+  cleanup();
+});
+
+function labels(): string[] {
+  return [...document.querySelectorAll(".context-menu-item")].map((b) => b.textContent ?? "");
+}
+
+describe("ContextMenu (#125)", () => {
+  it("renders one item per entry, in order", () => {
+    render(
+      <ContextMenu
+        x={10}
+        y={20}
+        items={[
+          { label: "Rename…", onSelect: () => {} },
+          { label: "Kill session", onSelect: () => {}, danger: true },
+        ]}
+        onClose={vi.fn()}
+      />,
+    );
+    expect(labels()).toEqual(["Rename…", "Kill session"]);
+    expect(document.querySelector(".context-menu-item.is-danger")?.textContent).toBe("Kill session");
+  });
+
+  it("runs the selected entry and closes", () => {
+    const chosen = vi.fn();
+    const onClose = vi.fn();
+    render(<ContextMenu x={0} y={0} items={[{ label: "Rename…", onSelect: chosen }]} onClose={onClose} />);
+    fireEvent.click(screen.getByRole("menuitem"));
+    expect(chosen).toHaveBeenCalledOnce();
+    expect(onClose).toHaveBeenCalledOnce();
+  });
+
+  it("closes on Escape and on a press outside it", () => {
+    const onClose = vi.fn();
+    render(<ContextMenu x={0} y={0} items={[{ label: "Rename…", onSelect: () => {} }]} onClose={onClose} />);
+    fireEvent.keyDown(document, { key: "Escape" });
+    expect(onClose).toHaveBeenCalledTimes(1);
+
+    fireEvent(document.body, new Event("pointerdown", { bubbles: true }));
+    expect(onClose).toHaveBeenCalledTimes(2);
+  });
+
+  it("stays open for a press inside itself", () => {
+    const onClose = vi.fn();
+    render(<ContextMenu x={0} y={0} items={[{ label: "Rename…", onSelect: () => {} }]} onClose={onClose} />);
+    const menu = document.querySelector(".context-menu") as HTMLElement;
+    fireEvent(menu, new Event("pointerdown", { bubbles: true }));
+    expect(onClose).not.toHaveBeenCalled();
+  });
+
+  it("closes on scroll and on resize", () => {
+    const onClose = vi.fn();
+    render(<ContextMenu x={0} y={0} items={[{ label: "Rename…", onSelect: () => {} }]} onClose={onClose} />);
+    fireEvent.scroll(window);
+    expect(onClose).toHaveBeenCalledTimes(1);
+
+    fireEvent.resize(window);
+    expect(onClose).toHaveBeenCalledTimes(2);
+  });
+});

web/src/components/common/ContextMenu.tsx

@@ -0,0 +1,86 @@
+// React port of ../../contextMenu.ts (#125), the general-purpose version —
+// unlike the sidebar's own menu, this one also closes on scroll/resize, since
+// a menu anchored to coordinates goes stale the moment the page moves under it.
+
+import { useEffect, useLayoutEffect, useRef, useState } from "react";
+import { createPortal } from "react-dom";
+
+export interface ContextMenuItem {
+  label: string;
+  onSelect(): void;
+  /** Renders the entry in the destructive style. */
+  danger?: boolean;
+}
+
+export interface ContextMenuProps {
+  x: number;
+  y: number;
+  items: ContextMenuItem[];
+  onClose(): void;
+}
+
+export function ContextMenu({ x, y, items, onClose }: ContextMenuProps) {
+  const ref = useRef<HTMLDivElement>(null);
+  const [pos, setPos] = useState({ left: x, top: y });
+
+  // Nudge back inside the viewport once the menu has a measurable size.
+  useLayoutEffect(() => {
+    const rect = ref.current?.getBoundingClientRect();
+    if (!rect) return;
+    const maxX = window.innerWidth - rect.width;
+    const maxY = window.innerHeight - rect.height;
+    setPos({ left: Math.max(0, Math.min(x, maxX)), top: Math.max(0, Math.min(y, maxY)) });
+  }, [x, y]);
+
+  useEffect(() => {
+    const onKeyDown = (e: KeyboardEvent) => {
+      if (e.key === "Escape") onClose();
+    };
+    const onPointerDown = (e: Event) => {
+      if (!ref.current?.contains(e.target as Node)) onClose();
+    };
+    document.addEventListener("keydown", onKeyDown, true);
+    window.addEventListener("pointerdown", onPointerDown, true);
+    window.addEventListener("scroll", onClose, true);
+    window.addEventListener("resize", onClose);
+    return () => {
+      document.removeEventListener("keydown", onKeyDown, true);
+      window.removeEventListener("pointerdown", onPointerDown, true);
+      window.removeEventListener("scroll", onClose, true);
+      window.removeEventListener("resize", onClose);
+    };
+  }, [onClose]);
+
+  useEffect(() => {
+    (ref.current?.firstElementChild as HTMLElement | null)?.focus();
+  }, []);
+
+  return createPortal(
+    <div
+      ref={ref}
+      role="menu"
+      className="context-menu fixed z-modal min-w-[160px] rounded-r-2 border border-border-strong bg-surface py-sp-1 shadow-2"
+      style={{ left: pos.left, top: pos.top }}
+    >
+      {items.map((item) => (
+        <button
+          key={item.label}
+          type="button"
+          role="menuitem"
+          className={`context-menu-item block w-full px-sp-3 py-sp-1 text-left text-fs-12 hover:bg-surface-2 ${
+            item.danger ? "is-danger text-danger" : "text-ink"
+          }`}
+          onClick={(e) => {
+            e.preventDefault();
+            e.stopPropagation();
+            onClose();
+            item.onSelect();
+          }}
+        >
+          {item.label}
+        </button>
+      ))}
+    </div>,
+    document.body,
+  );
+}

web/src/components/common/index.ts

@@ -0,0 +1 @@
+export { ContextMenu, type ContextMenuItem, type ContextMenuProps } from "./ContextMenu.js";

web/src/components/dialogs/HelpOverlay.test.tsx

@@ -0,0 +1,82 @@
+// @vitest-environment happy-dom
+import { cleanup, fireEvent, render, screen } from "@testing-library/react";
+import { afterEach, describe, expect, it } from "vitest";
+
+import { keyCaps } from "../../commands.js";
+import { groupedCommands } from "../../help.js";
+import { HelpOverlay } from "./HelpOverlay.js";
+
+afterEach(() => {
+  cleanup();
+});
+
+function press(key: string, init: KeyboardEventInit = {}): void {
+  fireEvent.keyDown(window, { key, ...init });
+}
+
+describe("HelpOverlay", () => {
+  it("opens on ? and closes on a second ?", () => {
+    render(<HelpOverlay />);
+    expect(screen.queryByRole("dialog")).toBeNull();
+    press("?", { shiftKey: true });
+    expect(screen.queryByRole("dialog")).not.toBeNull();
+    press("?", { shiftKey: true });
+    expect(screen.queryByRole("dialog")).toBeNull();
+  });
+
+  it("ignores ? while typing and when a non-shift modifier is held", () => {
+    render(<HelpOverlay />);
+    const input = document.createElement("input");
+    document.body.appendChild(input);
+    fireEvent.keyDown(input, { key: "?", shiftKey: true });
+    expect(screen.queryByRole("dialog")).toBeNull();
+
+    press("?", { ctrlKey: true });
+    expect(screen.queryByRole("dialog")).toBeNull();
+    input.remove();
+  });
+
+  it("closes on Escape, on the close button, and on a click outside the panel", () => {
+    render(<HelpOverlay />);
+
+    press("?", { shiftKey: true });
+    press("Escape");
+    expect(screen.queryByRole("dialog")).toBeNull();
+
+    press("?", { shiftKey: true });
+    fireEvent.click(screen.getByRole("button", { name: "Close" }));
+    expect(screen.queryByRole("dialog")).toBeNull();
+
+    press("?", { shiftKey: true });
+    fireEvent.click(screen.getByRole("dialog"));
+    expect(screen.queryByRole("dialog")).toBeNull();
+  });
+
+  it("stays open for a click inside the panel", () => {
+    render(<HelpOverlay />);
+    press("?", { shiftKey: true });
+    fireEvent.click(document.querySelector(".help-panel") as HTMLElement);
+    expect(screen.queryByRole("dialog")).not.toBeNull();
+  });
+
+  it("renders exactly the commands the registry has bound, grouped", () => {
+    render(<HelpOverlay />);
+    press("?", { shiftKey: true });
+
+    const groups = groupedCommands();
+    expect([...document.querySelectorAll(".help-group-title")].map((h) => h.textContent)).toEqual(
+      groups.map((g) => g.title),
+    );
+    expect(
+      [...document.querySelectorAll<HTMLElement>(".help-row")].map((r) => r.dataset.commandId),
+    ).toEqual(groups.flatMap((g) => g.items.map((c) => c.id)));
+    expect([...document.querySelectorAll(".help-desc")].map((d) => d.textContent)).toEqual(
+      groups.flatMap((g) => g.items.map((c) => c.label)),
+    );
+    expect(
+      [...document.querySelectorAll(".help-row")].map((r) =>
+        [...r.querySelectorAll("kbd")].map((k) => k.textContent).join(" "),
+      ),
+    ).toEqual(groups.flatMap((g) => g.items.map((c) => keyCaps(c.keys[0]).join(" "))));
+  });
+});

web/src/components/dialogs/HelpOverlay.tsx

@@ -0,0 +1,78 @@
+// React port of ../../help.ts: the `?` overlay renders the command registry
+// (commands.ts) directly — the same list that dispatches the keys — so a
+// binding can never be documented as one thing and do another.
+
+import { useEffect, useState } from "react";
+import { createPortal } from "react-dom";
+
+import { CommandSet, defineCommands, keyCaps } from "../../commands.js";
+import { groupedCommands } from "../../help.js";
+
+export function HelpOverlay() {
+  const [open, setOpen] = useState(false);
+
+  useEffect(() => {
+    const helpKeys = new CommandSet(defineCommands({ "help.toggle": () => setOpen((o) => !o) }));
+    const overlayKeys = new CommandSet(defineCommands({ "help.close": () => setOpen(false) }));
+    const onKeydown = (e: KeyboardEvent) => {
+      if (open && overlayKeys.handle(e)) return;
+      helpKeys.handle(e);
+    };
+    window.addEventListener("keydown", onKeydown);
+    return () => window.removeEventListener("keydown", onKeydown);
+  }, [open]);
+
+  if (!open) return null;
+
+  const close = () => setOpen(false);
+
+  return createPortal(
+    <div
+      role="dialog"
+      aria-modal="true"
+      aria-label="Keyboard shortcuts"
+      className="help-overlay fixed inset-0 z-modal flex items-center justify-center bg-bg/70"
+      onClick={(e) => {
+        if (e.target === e.currentTarget) close();
+      }}
+    >
+      <div className="help-panel max-h-[80vh] w-full max-w-[560px] overflow-auto rounded-r-3 border border-border bg-surface p-sp-4 shadow-2">
+        <header className="help-head flex items-center justify-between">
+          <h2 className="help-title m-0 text-fs-15 font-semibold text-ink">Keyboard shortcuts</h2>
+          <button
+            type="button"
+            aria-label="Close"
+            className="help-close rounded-r-1 px-sp-2 py-1 text-fs-15 text-muted hover:text-ink"
+            onClick={close}
+          >
+            ✕
+          </button>
+        </header>
+        {groupedCommands().map((group) => (
+          <section key={group.title} className="help-group mt-sp-3">
+            <h3 className="help-group-title text-fs-12 font-semibold text-muted">{group.title}</h3>
+            <dl className="help-list mt-sp-1">
+              {group.items.map((cmd) => (
+                <div
+                  key={cmd.id}
+                  className="help-row flex items-center justify-between gap-sp-3 py-sp-1"
+                  data-command-id={cmd.id}
+                >
+                  <dt className="help-keys m-0 flex gap-sp-1">
+                    {keyCaps(cmd.keys[0]).map((cap, i) => (
+                      <kbd key={i} className="rounded-r-1 border border-border px-sp-1 text-fs-11">
+                        {cap}
+                      </kbd>
+                    ))}
+                  </dt>
+                  <dd className="help-desc m-0 text-fs-12 text-ink">{cmd.label}</dd>
+                </div>
+              ))}
+            </dl>
+          </section>
+        ))}
+      </div>
+    </div>,
+    document.body,
+  );
+}

web/src/components/dialogs/KillDialog.test.tsx

@@ -0,0 +1,74 @@
+// @vitest-environment happy-dom
+import { cleanup, fireEvent, render, screen, waitFor } from "@testing-library/react";
+import { afterEach, describe, expect, it, vi } from "vitest";
+
+import { KillDialog } from "./KillDialog.js";
+
+afterEach(() => {
+  cleanup();
+});
+
+describe("KillDialog", () => {
+  it("focuses the kill button, so Enter confirms", () => {
+    render(<KillDialog name="alpha" blockers={null} onConfirm={() => Promise.resolve()} onCancel={vi.fn()} />);
+    expect(document.activeElement).toBe(screen.getByRole("button", { name: "Kill" }));
+  });
+
+  it("focuses the force button too", () => {
+    render(
+      <KillDialog
+        name="alpha"
+        blockers={null}
+        force
+        reason="worktree is dirty."
+        onConfirm={() => Promise.resolve()}
+        onCancel={vi.fn()}
+      />,
+    );
+    expect(document.activeElement).toBe(screen.getByRole("button", { name: "Force kill" }));
+  });
+
+  it("names the blockers in the confirm body", () => {
+    render(
+      <KillDialog
+        name="alpha"
+        blockers={{ uncommitted_files: 2, untracked_files: 0, unpushed_commits: 0 }}
+        onConfirm={() => Promise.resolve()}
+        onCancel={vi.fn()}
+      />,
+    );
+    expect(screen.getByText(/will be refused unless it is forced/)).not.toBeNull();
+  });
+
+  it("cancels on Cancel, on Escape and on a backdrop click", () => {
+    const onCancel = vi.fn();
+    const first = render(<KillDialog name="alpha" blockers={null} onConfirm={() => Promise.resolve()} onCancel={onCancel} />);
+    fireEvent.click(screen.getByRole("button", { name: "Cancel" }));
+    expect(onCancel).toHaveBeenCalledTimes(1);
+    first.unmount();
+
+    const second = render(<KillDialog name="alpha" blockers={null} onConfirm={() => Promise.resolve()} onCancel={onCancel} />);
+    fireEvent.keyDown(screen.getByRole("dialog"), { key: "Escape" });
+    expect(onCancel).toHaveBeenCalledTimes(2);
+    second.unmount();
+
+    render(<KillDialog name="alpha" blockers={null} onConfirm={() => Promise.resolve()} onCancel={onCancel} />);
+    fireEvent.click(screen.getByRole("dialog"));
+    expect(onCancel).toHaveBeenCalledTimes(3);
+  });
+
+  it("disables the button while pending and shows a rejection inline, so the press can be retried", async () => {
+    let reject: (e: Error) => void = () => {};
+    const onConfirm = vi.fn(() => new Promise<void>((_, r) => (reject = r)));
+    render(<KillDialog name="alpha" blockers={null} onConfirm={onConfirm} onCancel={vi.fn()} />);
+
+    const kill = screen.getByRole("button", { name: "Kill" }) as HTMLButtonElement;
+    fireEvent.click(kill);
+    expect(onConfirm).toHaveBeenCalledOnce();
+    expect(kill.disabled).toBe(true);
+
+    reject(new Error("daemon unreachable"));
+    await waitFor(() => expect(kill.disabled).toBe(false));
+    expect(screen.getByText("Failed to kill: daemon unreachable")).not.toBeNull();
+  });
+});

web/src/components/dialogs/KillDialog.tsx

@@ -0,0 +1,95 @@
+// React port of ../../killDialog.ts: the two kill prompts (#81, #160). The
+// daemon refuses an unforced kill over a worktree holding unsaved work; the
+// same component in `force` mode is the override that follows that refusal.
+
+import { useEffect, useRef, useState } from "react";
+import { createPortal } from "react-dom";
+
+import { formatInTheWay, type InTheWay } from "../../types.js";
+
+export interface KillDialogProps {
+  /** Session name, as the sidebar shows it. */
+  name: string;
+  /** What the card last saw in the way, when anything was. */
+  blockers: InTheWay | null;
+  /** Set once the daemon has refused an unforced kill: this pass forces it,
+   *  and `reason` carries the daemon's refusal message. */
+  force?: boolean;
+  /** Message from the daemon's refusal, shown when there are no blockers to
+   *  spell out. */
+  reason?: string;
+  /** Run the kill (or the forced kill). A rejection is rendered inline, and
+   *  the dialog stays open so the press can be retried. */
+  onConfirm(): Promise<void>;
+  onCancel(): void;
+}
+
+export function KillDialog(props: KillDialogProps) {
+  const { name, blockers, force, reason, onConfirm, onCancel } = props;
+  const confirmRef = useRef<HTMLButtonElement>(null);
+  const [pending, setPending] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  // The acting button takes the focus in both modes: the operator already
+  // asked for the kill, so Enter confirms it.
+  useEffect(() => confirmRef.current?.focus(), []);
+
+  const handleConfirm = () => {
+    setPending(true);
+    setError(null);
+    void onConfirm().catch((e: unknown) => {
+      setPending(false);
+      setError(`Failed to kill: ${(e as Error).message}`);
+    });
+  };
+
+  const body = blockers
+    ? force
+      ? `Its worktree still has ${formatInTheWay(blockers)}. Forcing the kill removes the session and leaves the worktree on disk.`
+      : `Its worktree still has ${formatInTheWay(blockers)}. The kill will be refused unless it is forced.`
+    : force
+      ? `${reason ?? ""} Forcing the kill removes the session and leaves the worktree on disk.`
+      : "The session and everything running in it go away. Its worktree stays on disk.";
+
+  return createPortal(
+    <div
+      role="dialog"
+      aria-modal="true"
+      aria-label={`Kill ${name}`}
+      className="kill-dialog fixed inset-0 z-modal flex items-center justify-center bg-bg/70"
+      onClick={(e) => {
+        if (e.target === e.currentTarget) onCancel();
+      }}
+      onKeyDown={(e) => {
+        if (e.key === "Escape") onCancel();
+      }}
+    >
+      <div className="kill-dialog-panel min-w-[280px] max-w-[420px] rounded-r-2 border border-border-strong bg-surface p-sp-4 shadow-2">
+        <h2 className="kill-dialog-title m-0 text-fs-15 font-semibold text-ink">Kill &quot;{name}&quot;?</h2>
+        <p className="kill-dialog-body mt-sp-2 text-fs-13 text-ink">{body}</p>
+        {error && <p className="kill-dialog-error mt-sp-2 text-fs-12 text-danger">{error}</p>}
+        <div className="kill-dialog-actions mt-sp-3 flex justify-end gap-sp-2">
+          <button
+            type="button"
+            className="kill-dialog-cancel rounded-r-1 border border-border px-sp-3 py-sp-1 text-fs-12 text-ink"
+            onClick={onCancel}
+          >
+            Cancel
+          </button>
+          <button
+            ref={confirmRef}
+            type="button"
+            disabled={pending}
+            className={`rounded-r-1 bg-danger px-sp-3 py-sp-1 text-fs-12 text-accent-ink disabled:opacity-60 ${
+              force ? "kill-dialog-force" : "kill-dialog-kill"
+            }`}
+            onClick={handleConfirm}
+          >
+            {force ? "Force kill" : "Kill"}
+          </button>
+        </div>
+      </div>
+    </div>,
+    document.body,
+  );
+}

web/src/components/dialogs/index.ts

@@ -0,0 +1,2 @@
+export { KillDialog, type KillDialogProps } from "./KillDialog.js";
+export { HelpOverlay } from "./HelpOverlay.js";

web/src/components/hooks/useViewport.test.tsx

@@ -0,0 +1,79 @@
+// @vitest-environment happy-dom
+import { cleanup, render } from "@testing-library/react";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+
+import { useViewport } from "./useViewport.js";
+
+function Probe() {
+  useViewport();
+  return null;
+}
+
+class FakeVisualViewport {
+  height = 800;
+  offsetTop = 0;
+  private listeners: Record<string, Array<() => void>> = { resize: [], scroll: [] };
+
+  addEventListener(type: string, cb: () => void): void {
+    this.listeners[type].push(cb);
+  }
+  removeEventListener(type: string, cb: () => void): void {
+    this.listeners[type] = this.listeners[type].filter((l) => l !== cb);
+  }
+  fire(type: "resize" | "scroll"): void {
+    for (const l of this.listeners[type]) l();
+  }
+}
+
+let vv: FakeVisualViewport;
+
+beforeEach(() => {
+  vv = new FakeVisualViewport();
+  vi.stubGlobal("visualViewport", vv);
+  vi.stubGlobal("requestAnimationFrame", (cb: FrameRequestCallback) => {
+    cb(0);
+    return 0;
+  });
+  vi.stubGlobal("cancelAnimationFrame", () => {});
+});
+
+afterEach(() => {
+  cleanup();
+  vi.unstubAllGlobals();
+  document.documentElement.className = "";
+  document.documentElement.removeAttribute("style");
+});
+
+describe("useViewport", () => {
+  it("mirrors the visual viewport's height and offset onto CSS custom properties", () => {
+    vv.height = 640;
+    vv.offsetTop = 12;
+    render(<Probe />);
+    const root = document.documentElement.style;
+    expect(root.getPropertyValue("--app-vh")).toBe("640px");
+    expect(root.getPropertyValue("--app-top")).toBe("12px");
+  });
+
+  it("no-ops when visualViewport is unavailable", () => {
+    vi.stubGlobal("visualViewport", undefined);
+    expect(() => render(<Probe />)).not.toThrow();
+    expect(document.documentElement.style.getPropertyValue("--app-vh")).toBe("");
+  });
+
+  it("marks kb-open once an editable shrinks the viewport well past the baseline", () => {
+    render(<Probe />);
+    const input = document.createElement("input");
+    document.body.appendChild(input);
+    input.focus();
+
+    vv.height = 800 - 200;
+    vv.fire("resize");
+    expect(document.documentElement.classList.contains("kb-open")).toBe(true);
+
+    input.blur();
+    vv.height = 800;
+    vv.fire("resize");
+    expect(document.documentElement.classList.contains("kb-open")).toBe(false);
+    input.remove();
+  });
+});

web/src/components/hooks/useViewport.ts

@@ -0,0 +1,51 @@
+// React port of ../../viewport.ts. Binds the app shell's height and position
+// to the *visual* viewport rather than the layout one, so a pinned bottom bar
+// (the attach view's special-key bar, NAP-342) lands above an open on-screen
+// keyboard instead of behind it. See viewport.ts for the full mechanism.
+
+import { useEffect } from "react";
+
+const KB_OPEN_THRESHOLD = 150;
+
+export function useViewport(): void {
+  useEffect(() => {
+    const vv = window.visualViewport;
+    if (!vv) return;
+
+    const root = document.documentElement;
+    let raf = 0;
+    let baseline = vv.height;
+
+    const isEditing = () => {
+      const a = document.activeElement as HTMLElement | null;
+      if (!a) return false;
+      return a.tagName === "TEXTAREA" || a.tagName === "INPUT" || a.isContentEditable;
+    };
+
+    const sync = () => {
+      raf = 0;
+      root.style.setProperty("--app-vh", `${Math.round(vv.height)}px`);
+      root.style.setProperty("--app-top", `${Math.round(vv.offsetTop)}px`);
+
+      // Nothing focused ⇒ keyboard can't be open ⇒ this height is the baseline.
+      const editing = isEditing();
+      if (!editing) baseline = vv.height;
+      const kbOpen = editing && baseline - vv.height > KB_OPEN_THRESHOLD;
+      root.classList.toggle("kb-open", kbOpen);
+    };
+    const schedule = () => {
+      if (raf) return;
+      raf = requestAnimationFrame(sync);
+    };
+
+    vv.addEventListener("resize", schedule);
+    vv.addEventListener("scroll", schedule);
+    sync();
+
+    return () => {
+      vv.removeEventListener("resize", schedule);
+      vv.removeEventListener("scroll", schedule);
+      if (raf) cancelAnimationFrame(raf);
+    };
+  }, []);
+}

web/src/components/layout/Drawer.test.tsx

@@ -0,0 +1,154 @@
+// @vitest-environment happy-dom
+import { act, cleanup, fireEvent, render } from "@testing-library/react";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+
+import { OPEN_SPAWN_EVENT, SPAWN_SIMILAR_EVENT } from "../../catalog.js";
+import { TOGGLE_DRAWER_EVENT } from "../../drawer.js";
+import { Drawer } from "./Drawer.js";
+
+/** Force the mobile media query on, whatever happy-dom's viewport says
+ *  (mirrors ../layout/MultiView's own `forceMobile` in multiview.test.ts). */
+function forceMobile(matches: boolean): void {
+  vi.spyOn(window, "matchMedia").mockImplementation(
+    (query: string) =>
+      ({
+        matches: query.includes("859") && matches,
+        media: query,
+        onchange: null,
+        addEventListener() {},
+        removeEventListener() {},
+        addListener() {},
+        removeListener() {},
+        dispatchEvent: () => false,
+      }) as unknown as MediaQueryList,
+  );
+}
+
+function shell(): HTMLElement {
+  return document.querySelector(".app-shell") as HTMLElement;
+}
+
+function touch(type: "touchstart" | "touchend", x: number, y: number): void {
+  const touches = [{ clientX: x, clientY: y }];
+  const event = new Event(type, { bubbles: true }) as unknown as {
+    touches: typeof touches;
+    changedTouches: typeof touches;
+  };
+  event.touches = touches;
+  event.changedTouches = touches;
+  act(() => {
+    document.dispatchEvent(event as unknown as Event);
+  });
+}
+
+beforeEach(() => forceMobile(true));
+
+afterEach(() => {
+  cleanup();
+  vi.restoreAllMocks();
+});
+
+function openViaToggle(): void {
+  act(() => {
+    document.dispatchEvent(new CustomEvent(TOGGLE_DRAWER_EVENT));
+  });
+}
+
+describe("Drawer (#35)", () => {
+  it("toggles open on the toggle event, off on desktop by class alone", () => {
+    render(
+      <Drawer sidebar={<div className="tree-leaf">row</div>}>
+        <div>content</div>
+      </Drawer>,
+    );
+    expect(shell().classList.contains("drawer-open")).toBe(false);
+    openViaToggle();
+    expect(shell().classList.contains("drawer-open")).toBe(true);
+  });
+
+  it("closes when a session row is tapped", () => {
+    render(
+      <Drawer sidebar={<div className="tree-leaf">row</div>}>
+        <div>content</div>
+      </Drawer>,
+    );
+    openViaToggle();
+    fireEvent.click(document.querySelector(".tree-leaf") as HTMLElement);
+    expect(shell().classList.contains("drawer-open")).toBe(false);
+  });
+
+  it("closes when a spawn is requested", () => {
+    render(
+      <Drawer sidebar={<div className="tree-leaf">row</div>}>
+        <div>content</div>
+      </Drawer>,
+    );
+    openViaToggle();
+    act(() => {
+      document.dispatchEvent(new CustomEvent(OPEN_SPAWN_EVENT));
+    });
+    expect(shell().classList.contains("drawer-open")).toBe(false);
+  });
+
+  it("closes when spawn similar is requested", () => {
+    render(
+      <Drawer sidebar={<div className="tree-leaf">row</div>}>
+        <div>content</div>
+      </Drawer>,
+    );
+    openViaToggle();
+    act(() => {
+      document.dispatchEvent(new CustomEvent(SPAWN_SIMILAR_EVENT, { detail: {} }));
+    });
+    expect(shell().classList.contains("drawer-open")).toBe(false);
+  });
+
+  it("closes on a backdrop click", () => {
+    render(
+      <Drawer sidebar={<div className="tree-leaf">row</div>}>
+        <div>content</div>
+      </Drawer>,
+    );
+    openViaToggle();
+    fireEvent.click(document.querySelector(".mv-backdrop") as HTMLElement);
+    expect(shell().classList.contains("drawer-open")).toBe(false);
+  });
+
+  it("opens on a rightward swipe and closes on a leftward one, only on mobile", () => {
+    render(
+      <Drawer sidebar={<div className="tree-leaf">row</div>}>
+        <div>content</div>
+      </Drawer>,
+    );
+    touch("touchstart", 0, 100);
+    touch("touchend", 100, 100);
+    expect(shell().classList.contains("drawer-open")).toBe(true);
+
+    touch("touchstart", 100, 100);
+    touch("touchend", 0, 100);
+    expect(shell().classList.contains("drawer-open")).toBe(false);
+  });
+
+  it("ignores swipes on desktop", () => {
+    forceMobile(false);
+    render(
+      <Drawer sidebar={<div className="tree-leaf">row</div>}>
+        <div>content</div>
+      </Drawer>,
+    );
+    touch("touchstart", 0, 100);
+    touch("touchend", 100, 100);
+    expect(shell().classList.contains("drawer-open")).toBe(false);
+  });
+
+  it("ignores a mostly-vertical or too-short gesture", () => {
+    render(
+      <Drawer sidebar={<div className="tree-leaf">row</div>}>
+        <div>content</div>
+      </Drawer>,
+    );
+    touch("touchstart", 0, 0);
+    touch("touchend", 10, 100);
+    expect(shell().classList.contains("drawer-open")).toBe(false);
+  });
+});

web/src/components/layout/Drawer.tsx

@@ -0,0 +1,93 @@
+// React port of ../../drawer.ts (#35): the mobile off-canvas sidebar. On
+// desktop the `drawer-open` class is inert — CSS gates the drawer styling to
+// narrow viewports (styles.css, `.app-shell`).
+//
+// Anything that puts a new view in the content area must close the drawer, or
+// it renders behind the sidebar and the tap reads as a dead button — this
+// listens for the same TOGGLE_DRAWER_EVENT/OPEN_SPAWN_EVENT/SPAWN_SIMILAR_EVENT
+// the rest of the shell already raises, so it needs no wiring from callers.
+
+import type { ReactNode } from "react";
+import { useEffect, useRef, useState } from "react";
+
+import { OPEN_SPAWN_EVENT, SPAWN_SIMILAR_EVENT } from "../../catalog.js";
+import { TOGGLE_DRAWER_EVENT } from "../../drawer.js";
+
+export interface DrawerProps {
+  sidebar: ReactNode;
+  children: ReactNode;
+  className?: string;
+}
+
+export function Drawer({ sidebar, children, className }: DrawerProps) {
+  const [open, setOpen] = useState(false);
+  const sidebarRef = useRef<HTMLDivElement>(null);
+
+  useEffect(() => {
+    const onToggle = () => setOpen((o) => !o);
+    const onClose = () => setOpen(false);
+    document.addEventListener(TOGGLE_DRAWER_EVENT, onToggle);
+    document.addEventListener(OPEN_SPAWN_EVENT, onClose);
+    document.addEventListener(SPAWN_SIMILAR_EVENT, onClose);
+    return () => {
+      document.removeEventListener(TOGGLE_DRAWER_EVENT, onToggle);
+      document.removeEventListener(OPEN_SPAWN_EVENT, onClose);
+      document.removeEventListener(SPAWN_SIMILAR_EVENT, onClose);
+    };
+  }, []);
+
+  // Horizontal swipes drive the drawer (right opens, left closes) rather than
+  // the browser's back/forward navigation. Only a clearly horizontal gesture
+  // past a threshold counts, so vertical terminal scrolling (which owns its
+  // own touch handler) is untouched.
+  useEffect(() => {
+    const mobileMq = window.matchMedia("(max-width: 859px)");
+    let sx = 0;
+    let sy = 0;
+    let tracking = false;
+
+    const onTouchStart = (e: TouchEvent) => {
+      tracking = mobileMq.matches && e.touches.length === 1;
+      if (tracking) {
+        sx = e.touches[0].clientX;
+        sy = e.touches[0].clientY;
+      }
+    };
+    const onTouchEnd = (e: TouchEvent) => {
+      if (!tracking) return;
+      tracking = false;
+      const t = e.changedTouches[0];
+      const dx = t.clientX - sx;
+      const dy = t.clientY - sy;
+      if (Math.abs(dx) < 60 || Math.abs(dx) < Math.abs(dy) * 1.5) return;
+      setOpen((o) => {
+        if (dx > 0 && !o) return true;
+        if (dx < 0 && o) return false;
+        return o;
+      });
+    };
+
+    document.addEventListener("touchstart", onTouchStart, { passive: true });
+    document.addEventListener("touchend", onTouchEnd, { passive: true });
+    return () => {
+      document.removeEventListener("touchstart", onTouchStart);
+      document.removeEventListener("touchend", onTouchEnd);
+    };
+  }, []);
+
+  return (
+    <div className={`app-shell flex h-full min-h-0 ${open ? "drawer-open" : ""} ${className ?? ""}`}>
+      <div
+        ref={sidebarRef}
+        className="sidebar flex h-full min-h-0 flex-col bg-surface"
+        onClick={(e) => {
+          if ((e.target as HTMLElement).closest(".tree-leaf")) setOpen(false);
+        }}
+      >
+        {sidebar}
+      </div>
+      <section className="content min-h-0 flex-1">{children}</section>
+      <div className="mv-backdrop" onClick={() => setOpen(false)} />
+    </div>
+  );
+}

web/src/components/layout/MultiView.test.tsx

@@ -0,0 +1,96 @@
+// @vitest-environment happy-dom
+import { cleanup, fireEvent, render, screen } from "@testing-library/react";
+import { afterEach, describe, expect, it, vi } from "vitest";
+
+import { leaves } from "../../layout.js";
+import { createLayoutStore } from "../../stores/layoutStore.js";
+import type { Session } from "../../types.js";
+import { MultiView } from "./MultiView.js";
+
+vi.mock("../terminal/TerminalPane.js", () => ({
+  TerminalPane: ({ sessionId }: { sessionId: string }) => <div data-testid={`terminal-${sessionId}`} />,
+}));
+
+vi.mock("../structured/StructuredPane.js", () => ({
+  StructuredPane: ({ sessionId }: { sessionId: string }) => <div data-testid={`structured-${sessionId}`} />,
+}));
+
+afterEach(cleanup);
+
+function store() {
+  return createLayoutStore({
+    load: () => null,
+    save: vi.fn(),
+    scheduler: { setTimer: () => 1, clearTimer: () => {} },
+  });
+}
+
+function session(id: string, over: Partial<Session> = {}): Session {
+  return {
+    id,
+    cwd: "/home/n",
+    command: "claude",
+    env: {},
+    metadata: {},
+    status: "Running",
+    created_at: "2026-01-01T00:00:00Z",
+    ...over,
+  } as Session;
+}
+
+describe("MultiView", () => {
+  it("shows the empty state when the active tab has no panes", () => {
+    const s = store();
+    render(<MultiView store={s} />);
+    expect(screen.getByText(/No session open/)).toBeTruthy();
+  });
+
+  it("renders a pane per leaf, dispatching to the terminal or structured body", () => {
+    const s = store();
+    s.getState().openSession("s1");
+    s.getState().openSessionBeside("s2");
+    const sessions = new Map([
+      ["s1", session("s1")],
+      ["s2", session("s2", { view: "Structured" })],
+    ]);
+    render(<MultiView store={s} sessions={sessions} />);
+    expect(screen.getByTestId("terminal-s1")).toBeTruthy();
+    expect(screen.getByTestId("structured-s2")).toBeTruthy();
+  });
+
+  it("split right adds a second pane to the tree", () => {
+    const s = store();
+    s.getState().openSession("s1");
+    render(<MultiView store={s} sessions={new Map([["s1", session("s1")]])} />);
+    fireEvent.click(screen.getByTitle("Split right"));
+    expect(screen.getAllByText("Empty pane")).toHaveLength(1);
+  });
+
+  it("close pane removes it", () => {
+    const s = store();
+    s.getState().openSession("s1");
+    const leafId = leaves(s.getState().layout.tabs[0].root)[0].id;
+    s.getState().splitFocused(leafId, "row"); // adds an empty leaf beside s1
+    render(<MultiView store={s} sessions={new Map([["s1", session("s1")]])} />);
+    // splitFocused(after: true) puts the fresh empty leaf second — close it.
+    fireEvent.click(screen.getAllByTitle("Close pane")[1]);
+    expect(screen.queryByText("Empty pane")).toBeNull();
+    expect(screen.getByTestId("terminal-s1")).toBeTruthy();
+  });
+
+  it("prunes a leaf whose session no longer exists, once the live set is known", () => {
+    const s = store();
+    s.getState().openSession("s1");
+    s.getState().openSessionBeside("dead");
+    render(<MultiView store={s} sessions={new Map([["s1", session("s1")]])} />);
+    expect(screen.getByTestId("terminal-s1")).toBeTruthy();
+    expect(screen.queryByTestId("terminal-dead")).toBeNull();
+  });
+
+  it("does not touch the layout while the live set is still unknown", () => {
+    const s = store();
+    s.getState().openSession("s1");
+    render(<MultiView store={s} />);
+    expect(screen.getByTestId("terminal-s1")).toBeTruthy();
+  });
+});

web/src/components/layout/MultiView.tsx

@@ -0,0 +1,203 @@
+// React port of multiview.ts's tab + split tree (issue #249). Preview mode
+// (docs/PREVIEW.md) is issue #251; sidebar drag-to-dock and the mobile
+// single-pane collapse stay with whichever issue wires this into the shell
+// (#253) — this renders the tree itself: tabs, nested splits, pane chrome.
+
+import type { ReactNode } from "react";
+import { useEffect, useRef } from "react";
+import { useStore } from "zustand";
+
+import { activeTab, type Dir, type Node } from "../../layout.js";
+import type { LayoutStore, LayoutStoreApi } from "../../stores/layoutStore.js";
+import type { Session, Uuid } from "../../types.js";
+import { PaneContainer } from "./PaneContainer.js";
+import { PaneTitle } from "./PaneTitle.js";
+import { TabBar } from "./TabBar.js";
+
+export interface MultiViewProps {
+  store: LayoutStoreApi;
+  /** Live sessions, keyed by id — drives pane titles and (once known) boot
+   *  reconciliation. Passing `undefined` defers reconciliation. */
+  sessions?: ReadonlyMap<Uuid, Session>;
+  onDisconnect?: (sessionId: Uuid) => void;
+  emptyState?: ReactNode;
+}
+
+export function MultiView({ store, sessions, onDisconnect, emptyState }: MultiViewProps) {
+  const layout = useStore(store, (s: LayoutStore) => s.layout);
+  const tab = activeTab(layout);
+
+  const reconciledRef = useRef(false);
+  useEffect(() => {
+    if (reconciledRef.current || !sessions) return;
+    reconciledRef.current = true;
+    store.getState().reconcile(new Set(sessions.keys()));
+  }, [sessions, store]);
+
+  return (
+    <div className="mv flex h-full min-h-0 flex-col">
+      <TabBar store={store} />
+      <div className="mv-canvas min-h-0 flex-1">
+        {tab.root ? (
+          <SplitNode node={tab.root} tab={tab} store={store} sessions={sessions} onDisconnect={onDisconnect} />
+        ) : (
+          (emptyState ?? (
+            <div className="mv-empty flex h-full items-center justify-center p-sp-4 text-fs-13 text-faint">
+              No session open — pick one from the sidebar, or spawn a new one.
+            </div>
+          ))
+        )}
+      </div>
+    </div>
+  );
+}
+
+interface TreeProps {
+  tab: { id: string; focusedLeafId: string | null };
+  store: LayoutStoreApi;
+  sessions?: ReadonlyMap<Uuid, Session>;
+  onDisconnect?: (sessionId: Uuid) => void;
+}
+
+function SplitNode({ node, ...rest }: TreeProps & { node: Node }) {
+  if (node.kind === "leaf") {
+    return <Pane leaf={node} isFocused={rest.tab.focusedLeafId === node.id} {...rest} />;
+  }
+  return <SplitContainer node={node} {...rest} />;
+}
+
+function SplitContainer({ node, ...rest }: TreeProps & { node: Extract<Node, { kind: "split" }> }) {
+  const slotA = useRef<HTMLDivElement | null>(null);
+  const slotB = useRef<HTMLDivElement | null>(null);
+  const containerRef = useRef<HTMLDivElement | null>(null);
+
+  const onDividerPointerDown = (e: React.PointerEvent<HTMLDivElement>) => {
+    e.preventDefault();
+    const divider = e.currentTarget;
+    const container = containerRef.current;
+    if (!container) return;
+    divider.setPointerCapture(e.pointerId);
+    const rect = container.getBoundingClientRect();
+    const move = (ev: PointerEvent) => {
+      const frac =
+        node.dir === "row" ? (ev.clientX - rect.left) / rect.width : (ev.clientY - rect.top) / rect.height;
+      node.ratio = Math.max(0.1, Math.min(0.9, frac));
+      if (slotA.current) slotA.current.style.flexGrow = String(node.ratio);
+      if (slotB.current) slotB.current.style.flexGrow = String(1 - node.ratio);
+    };
+    const up = (ev: PointerEvent) => {
+      try {
+        divider.releasePointerCapture(ev.pointerId);
+      } catch {
+        // already released
+      }
+      divider.removeEventListener("pointermove", move);
+      divider.removeEventListener("pointerup", up);
+      rest.store.getState().commitLayout();
+    };
+    divider.addEventListener("pointermove", move);
+    divider.addEventListener("pointerup", up);
+  };
+
+  return (
+    <div
+      ref={containerRef}
+      className={`mv-split flex h-full min-h-0 w-full ${node.dir === "row" ? "flex-row" : "flex-col"}`}
+    >
+      <div ref={slotA} className="mv-slot min-h-0 min-w-0" style={{ flex: `${node.ratio} 1 0` }}>
+        <SplitNode node={node.a} {...rest} />
+      </div>
+      <div
+        className={
+          "mv-divider flex-none bg-border-strong hover:bg-accent " +
+          (node.dir === "row" ? "w-[3px] cursor-col-resize" : "h-[3px] cursor-row-resize")
+        }
+        onPointerDown={onDividerPointerDown}
+      />
+      <div ref={slotB} className="mv-slot min-h-0 min-w-0" style={{ flex: `${1 - node.ratio} 1 0` }}>
+        <SplitNode node={node.b} {...rest} />
+      </div>
+    </div>
+  );
+}
+
+function Pane({
+  leaf,
+  isFocused,
+  store,
+  sessions,
+  onDisconnect,
+}: TreeProps & { leaf: Extract<Node, { kind: "leaf" }>; isFocused: boolean }) {
+  const session = leaf.sessionId ? sessions?.get(leaf.sessionId) : undefined;
+  const splitFocused = (dir: Dir) => store.getState().splitFocused(leaf.id, dir);
+
+  return (
+    <div
+      className={
+        "mv-pane flex h-full min-h-0 min-w-0 flex-col border " +
+        (isFocused ? "border-accent" : "border-border-strong")
+      }
+      data-leaf-id={leaf.id}
+      data-session-id={leaf.sessionId ?? undefined}
+      onPointerDownCapture={() => store.getState().focusLeaf(leaf.id)}
+    >
+      <div className="mv-pane-header flex items-center justify-between gap-sp-2 border-b border-border-strong bg-surface px-sp-2 py-sp-1 text-fs-12">
+        {leaf.sessionId ? (
+          <PaneTitle sessionId={leaf.sessionId} session={session} />
+        ) : (
+          <span className="text-faint">Empty pane</span>
+        )}
+        <div className="mv-pane-tools flex items-center gap-sp-1">
+          {leaf.sessionId && onDisconnect && (
+            <button
+              type="button"
+              className="mv-tool rounded-r-1 px-sp-1 text-faint hover:bg-surface-3 hover:text-ink"
+              title="Disconnect"
+              onClick={() => onDisconnect(leaf.sessionId!)}
+            >
+              ⏻
+            </button>
+          )}
+          <button
+            type="button"
+            className="mv-tool rounded-r-1 px-sp-1 text-faint hover:bg-surface-3 hover:text-ink"
+            title="Split right"
+            onClick={() => splitFocused("row")}
+          >
+            ▥
+          </button>
+          <button
+            type="button"
+            className="mv-tool rounded-r-1 px-sp-1 text-faint hover:bg-surface-3 hover:text-ink"
+            title="Split down"
+            onClick={() => splitFocused("col")}
+          >
+            ▤
+          </button>
+          <button
+            type="button"
+            className="mv-tool rounded-r-1 px-sp-1 text-faint hover:bg-surface-3 hover:text-ink"
+            title="Close pane"
+            onClick={() => store.getState().closePane(leaf.id)}
+          >
+            ✕
+          </button>
+        </div>
+      </div>
+      <div className="mv-pane-host min-h-0 flex-1">
+        {leaf.sessionId ? (
+          <PaneContainer
+            sessionId={leaf.sessionId}
+            session={session}
+            focus={isFocused}
+            onClosed={() => store.getState().closeSession(leaf.sessionId!)}
+          />
+        ) : (
+          <div className="mv-pane-empty flex h-full items-center justify-center p-sp-4 text-fs-13 text-faint">
+            Empty pane — pick a session from the sidebar, or spawn one.
+          </div>
+        )}
+      </div>
+    </div>
+  );
+}

web/src/components/layout/PaneContainer.test.tsx

@@ -0,0 +1,54 @@
+// @vitest-environment happy-dom
+import { cleanup, render, screen } from "@testing-library/react";
+import { afterEach, describe, expect, it, vi } from "vitest";
+
+import type { Session } from "../../types.js";
+import { PaneContainer } from "./PaneContainer.js";
+
+vi.mock("../terminal/TerminalPane.js", () => ({
+  TerminalPane: ({ sessionId, focus }: { sessionId: string; focus?: boolean }) => (
+    <div data-testid="terminal-pane" data-session-id={sessionId} data-focus={String(focus)} />
+  ),
+}));
+
+vi.mock("../structured/StructuredPane.js", () => ({
+  StructuredPane: ({ sessionId, focus }: { sessionId: string; focus?: boolean }) => (
+    <div data-testid="structured-pane" data-session-id={sessionId} data-focus={String(focus)} />
+  ),
+}));
+
+afterEach(cleanup);
+
+function session(over: Partial<Session> = {}): Session {
+  return {
+    id: "s1",
+    cwd: "/home/n",
+    command: "claude",
+    env: {},
+    metadata: {},
+    status: "Running",
+    created_at: "2026-01-01T00:00:00Z",
+    ...over,
+  } as Session;
+}
+
+describe("PaneContainer", () => {
+  it("renders TerminalPane when the session has no view (defaults to Terminal)", () => {
+    render(<PaneContainer sessionId="s1" session={session()} />);
+    expect(screen.getByTestId("terminal-pane")).toBeTruthy();
+    expect(screen.queryByTestId("structured-pane")).toBeNull();
+  });
+
+  it("renders TerminalPane when the session isn't known yet", () => {
+    render(<PaneContainer sessionId="s1" />);
+    expect(screen.getByTestId("terminal-pane")).toBeTruthy();
+  });
+
+  it("renders StructuredPane for a Structured session", () => {
+    render(<PaneContainer sessionId="s1" session={session({ view: "Structured" })} focus={false} />);
+    const pane = screen.getByTestId("structured-pane");
+    expect(pane.dataset.sessionId).toBe("s1");
+    expect(pane.dataset.focus).toBe("false");
+    expect(screen.queryByTestId("terminal-pane")).toBeNull();
+  });
+});

web/src/components/layout/PaneContainer.tsx

@@ -0,0 +1,49 @@
+// Dispatches a leaf's session to the right body — TerminalPane for a PTY
+// session, StructuredPane for an ACP one (session.view, #133/#140/#249).
+
+import { forwardRef, useImperativeHandle, useRef } from "react";
+
+import type { Session, Uuid } from "../../types.js";
+import { StructuredPane, type StructuredPaneHandle } from "../structured/StructuredPane.js";
+import { TerminalPane, type TerminalPaneHandle } from "../terminal/TerminalPane.js";
+
+export interface PaneContainerHandle {
+  focusTerminal(): void;
+  /** No-op for a structured pane — it has no PTY (pane.ts's PaneConnection contract). */
+  sendInput(data: string): void;
+}
+
+export interface PaneContainerProps {
+  sessionId: Uuid;
+  session?: Session;
+  /** Grabs the keyboard once connected. A sidebar preview passes `false`. */
+  focus?: boolean;
+  onClosed?: () => void;
+  className?: string;
+}
+
+export const PaneContainer = forwardRef<PaneContainerHandle, PaneContainerProps>(function PaneContainer(
+  { sessionId, session, focus, onClosed, className },
+  ref,
+) {
+  const terminalRef = useRef<TerminalPaneHandle>(null);
+  const structuredRef = useRef<StructuredPaneHandle>(null);
+
+  useImperativeHandle(
+    ref,
+    () => ({
+      focusTerminal: () => {
+        terminalRef.current?.focusTerminal();
+        structuredRef.current?.focusComposer();
+      },
+      sendInput: (data: string) => terminalRef.current?.sendInput(data),
+    }),
+    [],
+  );
+
+  return session?.view === "Structured" ? (
+    <StructuredPane ref={structuredRef} sessionId={sessionId} focus={focus} onClosed={onClosed} className={className} />
+  ) : (
+    <TerminalPane ref={terminalRef} sessionId={sessionId} focus={focus} onClosed={onClosed} className={className} />
+  );
+});

web/src/components/layout/PaneTitle.test.tsx

@@ -0,0 +1,48 @@
+// @vitest-environment happy-dom
+import { cleanup, render, screen } from "@testing-library/react";
+import { afterEach, describe, expect, it } from "vitest";
+
+import type { Session } from "../../types.js";
+import { PaneTitle } from "./PaneTitle.js";
+
+afterEach(cleanup);
+
+function session(over: Partial<Session> = {}): Session {
+  return {
+    id: "s1",
+    cwd: "/home/n",
+    command: "claude",
+    env: {},
+    metadata: {},
+    status: "Running",
+    created_at: "2026-01-01T00:00:00Z",
+    ...over,
+  } as Session;
+}
+
+describe("PaneTitle", () => {
+  it("falls back to a short session id when the session isn't known yet", () => {
+    render(<PaneTitle sessionId="abcdef12-3456-7890-abcd-ef1234567890" />);
+    expect(screen.getByText(/abcdef12/)).toBeTruthy();
+  });
+
+  it("shows the name alone when the command matches it", () => {
+    render(<PaneTitle sessionId="s1" session={session({ command: "claude", metadata: { name: "claude" } })} />);
+    expect(screen.getByText("claude")).toBeTruthy();
+    expect(document.querySelector(".at-cmd")).toBeNull();
+  });
+
+  it("shows the command alongside a custom name", () => {
+    render(
+      <PaneTitle sessionId="s1" session={session({ command: "hx src/main.rs", metadata: { name: "editor" } })} />,
+    );
+    expect(screen.getByText("editor")).toBeTruthy();
+    expect(document.querySelector(".at-cmd")).not.toBeNull();
+  });
+
+  it("never injects markup from a session name", () => {
+    render(<PaneTitle sessionId="s1" session={session({ metadata: { name: "<img onerror=x>" } })} />);
+    expect(document.querySelector("img")).toBeNull();
+    expect(screen.getByText("<img onerror=x>")).toBeTruthy();
+  });
+});

web/src/components/layout/PaneTitle.tsx

@@ -0,0 +1,39 @@
+// React port of paneTitle.ts: a pane header's session identity — the name,
+// then the command as its tool mark when recognised, same as the sidebar
+// card's own CommandFragment (SessionCard.tsx). JSX escapes text nodes, so
+// unlike the vanilla string-builder this needs no manual HTML escaping.
+
+import { splitCommand, toolIconSvg } from "../../toolIcon.js";
+import { sessionName, type Session, type Uuid } from "../../types.js";
+
+export interface PaneTitleProps {
+  sessionId: Uuid;
+  session?: Session;
+  className?: string;
+}
+
+export function PaneTitle({ sessionId, session, className }: PaneTitleProps) {
+  if (!session) {
+    return (
+      <span className={className ?? "at-title"} title={sessionId}>
+        session <span className="sid">{sessionId.slice(0, 8)}</span>
+      </span>
+    );
+  }
+
+  const name = sessionName(session);
+  const showCommand = Boolean(session.command) && session.command !== name;
+  const { tool, program } = splitCommand(session.command);
+  const icon = tool ? toolIconSvg(tool) : null;
+
+  return (
+    <span className={className ?? "at-title"} title={`${name} · ${session.command}  (${sessionId})`}>
+      <span className="at-name">{name}</span>
+      {showCommand && (
+        <span className="at-cmd">
+          {icon ? <span className="contents" dangerouslySetInnerHTML={{ __html: icon }} /> : <span>{program}</span>}
+        </span>
+      )}
+    </span>
+  );
+}

web/src/components/layout/TabBar.test.tsx

@@ -0,0 +1,88 @@
+// @vitest-environment happy-dom
+import { cleanup, fireEvent, render, screen } from "@testing-library/react";
+import { afterEach, describe, expect, it, vi } from "vitest";
+
+import { createLayoutStore } from "../../stores/layoutStore.js";
+import { TabBar } from "./TabBar.js";
+
+afterEach(cleanup);
+
+function store() {
+  return createLayoutStore({
+    load: () => null,
+    save: vi.fn(),
+    scheduler: { setTimer: () => 1, clearTimer: () => {} },
+  });
+}
+
+function dataTransfer() {
+  const data = new Map<string, string>();
+  return {
+    setData: (type: string, value: string) => data.set(type, value),
+    getData: (type: string) => data.get(type) ?? "",
+    effectAllowed: "",
+  };
+}
+
+describe("TabBar", () => {
+  it("renders one tab per layout tab, marking the active one", () => {
+    const s = store();
+    s.getState().addTab();
+    render(<TabBar store={s} />);
+    const tabs = screen.getAllByRole("tab");
+    expect(tabs).toHaveLength(2);
+    expect(tabs[1].getAttribute("aria-selected")).toBe("true");
+    expect(tabs[0].getAttribute("aria-selected")).toBe("false");
+  });
+
+  it("shows the open-session count next to a tab's title", () => {
+    const s = store();
+    s.getState().openSession("s1");
+    render(<TabBar store={s} />);
+    expect(screen.getByText(/· 1/)).toBeTruthy();
+  });
+
+  it("clicking a tab selects it", () => {
+    const s = store();
+    s.getState().addTab();
+    const [first] = s.getState().layout.tabs;
+    render(<TabBar store={s} />);
+    fireEvent.click(screen.getAllByRole("tab")[0]);
+    expect(s.getState().layout.activeTabId).toBe(first.id);
+  });
+
+  it("the + button adds a tab", () => {
+    const s = store();
+    render(<TabBar store={s} />);
+    fireEvent.click(screen.getByTitle("New tab"));
+    expect(s.getState().layout.tabs).toHaveLength(2);
+  });
+
+  it("hides the close control on the last remaining tab", () => {
+    const s = store();
+    render(<TabBar store={s} />);
+    expect(screen.queryByTitle("Close tab")).toBeNull();
+  });
+
+  it("closing a tab removes it", () => {
+    const s = store();
+    s.getState().addTab();
+    render(<TabBar store={s} />);
+    fireEvent.click(screen.getAllByTitle("Close tab")[0]);
+    expect(s.getState().layout.tabs).toHaveLength(1);
+  });
+
+  it("dragging a tab onto another reorders them", () => {
+    const s = store();
+    s.getState().addTab();
+    s.getState().addTab();
+    const [a, b, c] = s.getState().layout.tabs;
+    render(<TabBar store={s} />);
+    const tabs = screen.getAllByRole("tab");
+    const dt = dataTransfer();
+    fireEvent.dragStart(tabs[0], { dataTransfer: dt });
+    fireEvent.dragOver(tabs[2], { dataTransfer: dt });
+    fireEvent.drop(tabs[2], { dataTransfer: dt });
+    expect(s.getState().layout.tabs.map((t) => t.id)).toEqual([b.id, c.id, a.id]);
+  });
+});

web/src/components/layout/TabBar.tsx

@@ -0,0 +1,91 @@
+// The tab strip above the canvas (issue #249): click to switch, drag to
+// reorder, a close ✕ per tab (hidden on the last one), a trailing + to add.
+
+import { useState } from "react";
+import { useStore } from "zustand";
+
+import { leaves } from "../../layout.js";
+import type { LayoutStore, LayoutStoreApi } from "../../stores/layoutStore.js";
+
+export interface TabBarProps {
+  store: LayoutStoreApi;
+}
+
+export function TabBar({ store }: TabBarProps) {
+  const layout = useStore(store, (s: LayoutStore) => s.layout);
+  const [draggingId, setDraggingId] = useState<string | null>(null);
+  const [overId, setOverId] = useState<string | null>(null);
+
+  return (
+    <div className="mv-tabs flex items-center gap-sp-1 overflow-x-auto border-b border-border-strong bg-surface px-sp-2 text-fs-12" role="tablist">
+      {layout.tabs.map((tab) => {
+        const count = leaves(tab.root).filter((l) => l.sessionId).length;
+        const isActive = tab.id === layout.activeTabId;
+        const isDropTarget = overId === tab.id && draggingId !== null && draggingId !== tab.id;
+        return (
+          <button
+            key={tab.id}
+            type="button"
+            role="tab"
+            aria-selected={isActive}
+            draggable
+            data-tab-id={tab.id}
+            className={
+              "mv-tab flex items-center gap-sp-1 rounded-t-r-1 px-sp-2 py-sp-1 " +
+              (isActive ? "bg-surface-2 text-ink" : "text-faint hover:text-ink") +
+              (isDropTarget ? " outline outline-2 outline-accent" : "")
+            }
+            onDragStart={(e) => {
+              setDraggingId(tab.id);
+              e.dataTransfer.setData("text/plain", tab.id);
+              e.dataTransfer.effectAllowed = "move";
+            }}
+            onDragOver={(e) => {
+              if (!draggingId || draggingId === tab.id) return;
+              e.preventDefault();
+              setOverId(tab.id);
+            }}
+            onDragLeave={() => setOverId((current) => (current === tab.id ? null : current))}
+            onDrop={(e) => {
+              e.preventDefault();
+              const fromId = e.dataTransfer.getData("text/plain") || draggingId;
+              setDraggingId(null);
+              setOverId(null);
+              if (fromId && fromId !== tab.id) store.getState().reorderTab(fromId, tab.id);
+            }}
+            onDragEnd={() => {
+              setDraggingId(null);
+              setOverId(null);
+            }}
+            onClick={() => store.getState().selectTab(tab.id)}
+          >
+            <span>
+              {tab.title}
+              {count ? ` · ${count}` : ""}
+            </span>
+            {layout.tabs.length > 1 && (
+              <span
+                className="mv-tab-close text-faint hover:text-ink"
+                title="Close tab"
+                onClick={(e) => {
+                  e.stopPropagation();
+                  store.getState().closeTab(tab.id);
+                }}
+              >
+                ✕
+              </span>
+            )}
+          </button>
+        );
+      })}
+      <button
+        type="button"
+        className="mv-tab-add px-sp-2 py-sp-1 text-muted hover:text-ink"
+        title="New tab"
+        onClick={() => store.getState().addTab()}
+      >
+        +
+      </button>
+    </div>
+  );
+}

web/src/components/sidebar/ActivityRail.tsx

@@ -0,0 +1,47 @@
+// docs/SIDEBAR.md: a 5px bar pinned to the row's own left edge, square
+// corners, full card height. It paints for every card, Idle included, and it
+// carries the accessible name of the state so status is never colour-only.
+
+import { activityColorSlug } from "../../activity.js";
+import type { ActivityState } from "../../types.js";
+
+export const STATE_WORDS: Record<string, string> = {
+  active: "Active",
+  idle: "Idle",
+  "awaiting-input": "Awaiting input",
+  error: "Error",
+};
+
+/** Rail fill per state, and the motion the state earns. */
+const RAIL_CLASS: Record<string, string> = {
+  active: "bg-live",
+  idle: "bg-border-strong",
+  "awaiting-input": "bg-warn rail-blink",
+  error: "bg-danger rail-flash",
+};
+
+/** Duration text inherits the rail's colour (docs/SIDEBAR.md). */
+export const DURATION_CLASS: Record<string, string> = {
+  active: "text-live",
+  idle: "text-muted",
+  "awaiting-input": "text-warn",
+  error: "text-danger",
+};
+
+export function stateWordFor(activity: ActivityState | string | undefined): string {
+  return STATE_WORDS[activityColorSlug(activity ?? "Idle")] ?? STATE_WORDS.idle;
+}
+
+export function ActivityRail({ activity }: { activity: ActivityState | string | undefined }) {
+  const slug = activityColorSlug(activity ?? "Idle");
+  const word = STATE_WORDS[slug] ?? STATE_WORDS.idle;
+  return (
+    <span
+      className={`absolute left-0 top-0 bottom-0 w-[5px] ${RAIL_CLASS[slug] ?? RAIL_CLASS.idle}`}
+      data-activity={slug}
+      role="img"
+      title={word}
+      aria-label={word}
+    />
+  );
+}

web/src/components/sidebar/ContextMenu.tsx

@@ -0,0 +1,64 @@
+// Right-click menu on a session card (docs/SIDEBAR.md): rename, spawn similar,
+// kill. Rendered into <body> so a scrolling sidebar cannot clip it.
+
+import { useEffect, useRef } from "react";
+import { createPortal } from "react-dom";
+
+export interface ContextMenuItem {
+  label: string;
+  danger?: boolean;
+  onSelect(): void;
+}
+
+export interface ContextMenuProps {
+  x: number;
+  y: number;
+  items: ContextMenuItem[];
+  onClose(): void;
+}
+
+export function ContextMenu({ x, y, items, onClose }: ContextMenuProps) {
+  const ref = useRef<HTMLDivElement>(null);
+
+  useEffect(() => {
+    const onKey = (e: KeyboardEvent) => {
+      if (e.key === "Escape") onClose();
+    };
+    const onDown = (e: Event) => {
+      if (!ref.current?.contains(e.target as Node)) onClose();
+    };
+    document.addEventListener("keydown", onKey);
+    document.addEventListener("pointerdown", onDown, true);
+    return () => {
+      document.removeEventListener("keydown", onKey);
+      document.removeEventListener("pointerdown", onDown, true);
+    };
+  }, [onClose]);
+
+  return createPortal(
+    <div
+      ref={ref}
+      role="menu"
+      className="context-menu fixed z-modal min-w-[160px] rounded-r-2 border border-border-strong bg-surface py-sp-1 shadow-2"
+      style={{ left: x, top: y }}
+    >
+      {items.map((item) => (
+        <button
+          key={item.label}
+          type="button"
+          role="menuitem"
+          className={`block w-full px-sp-3 py-sp-1 text-left text-fs-12 hover:bg-surface-2 ${
+            item.danger ? "text-danger" : "text-ink"
+          }`}
+          onClick={() => {
+            onClose();
+            item.onSelect();
+          }}
+        >
+          {item.label}
+        </button>
+      ))}
+    </div>,
+    document.body,
+  );
+}

web/src/components/sidebar/FolderNode.tsx

@@ -0,0 +1,51 @@
+// A collapsible directory in the sidebar tree. Only a *collapsed* header is a
+// keyboard-walk stop (docs/SIDEBAR.md); an expanded one is decoration in front
+// of the cards it holds, so it carries no highlight of its own.
+
+import type { ReactNode } from "react";
+
+import { splitFolderLabel } from "./model.js";
+
+export interface FolderNodeProps {
+  name: string;
+  path: string;
+  depth: number;
+  collapsed: boolean;
+  highlighted: boolean;
+  onToggle(): void;
+  children: ReactNode;
+}
+
+export function FolderNode(props: FolderNodeProps) {
+  const { stem, last } = splitFolderLabel(props.name);
+  return (
+    <div className="tree-folder">
+      <button
+        type="button"
+        className={`tree-folder-header flex w-full items-center gap-sp-1 py-[2px] text-fs-11 text-muted ${
+          props.highlighted ? "ring-1 ring-accent-ring" : ""
+        }`}
+        style={{ paddingLeft: props.depth * 16 }}
+        aria-expanded={!props.collapsed}
+        data-nav-key={`folder:${props.path}`}
+        data-highlighted={props.highlighted ? "true" : undefined}
+        title={props.name}
+        onClick={props.onToggle}
+      >
+        {/* One glyph, rotated when collapsed, so the mark and the rotation
+            never disagree about which way the folder points. */}
+        <span
+          aria-hidden="true"
+          className={`inline-block transition-transform ${props.collapsed ? "-rotate-90" : ""}`}
+        >
+          ▾
+        </span>
+        <span className="truncate">
+          {stem && <span className="text-faint">{stem}/</span>}
+          {last}
+        </span>
+      </button>
+      {!props.collapsed && props.children}
+    </div>
+  );
+}

web/src/components/sidebar/KillConfirm.tsx

@@ -0,0 +1,63 @@
+// docs/SIDEBAR.md "Killing a session": every kill confirms first, and the
+// confirmation names what the card last saw in the way — the daemon refuses an
+// unforced kill over such a tree, and saying so beforehand is cheaper than the
+// refusal. Cancel holds the focus so a stray Enter kills nothing.
+
+import { useEffect, useRef } from "react";
+import { createPortal } from "react-dom";
+
+import type { InTheWay } from "../../types.js";
+import { formatInTheWay } from "../../types.js";
+
+export interface KillConfirmProps {
+  name: string;
+  blockers: InTheWay | null;
+  /** Set when the daemon already refused an unforced kill: this pass forces. */
+  force?: boolean;
+  onConfirm(): void;
+  onCancel(): void;
+}
+
+export function KillConfirm(props: KillConfirmProps) {
+  const cancel = useRef<HTMLButtonElement>(null);
+  useEffect(() => cancel.current?.focus(), []);
+
+  return createPortal(
+    <div
+      role="dialog"
+      aria-modal="true"
+      aria-label={props.force ? "Force kill session" : "Kill session"}
+      className="kill-confirm fixed inset-0 z-modal flex items-center justify-center bg-bg/70"
+      onKeyDown={(e) => {
+        if (e.key === "Escape") props.onCancel();
+      }}
+    >
+      <div className="min-w-[280px] rounded-r-2 border border-border-strong bg-surface p-sp-4 shadow-2">
+        <p className="text-fs-13 text-ink">
+          {props.force ? "Force kill" : "Kill"} <strong>{props.name}</strong>?
+        </p>
+        {props.blockers && (
+          <p className="mt-sp-2 text-fs-12 text-warn">{formatInTheWay(props.blockers)}</p>
+        )}
+        <div className="mt-sp-3 flex justify-end gap-sp-2">
+          <button
+            ref={cancel}
+            type="button"
+            className="rounded-r-1 border border-border px-sp-3 py-sp-1 text-fs-12 text-ink"
+            onClick={props.onCancel}
+          >
+            Cancel
+          </button>
+          <button
+            type="button"
+            className="rounded-r-1 bg-danger px-sp-3 py-sp-1 text-fs-12 text-accent-ink"
+            onClick={props.onConfirm}
+          >
+            {props.force ? "Force kill" : "Kill"}
+          </button>
+        </div>
+      </div>
+    </div>,
+    document.body,
+  );
+}

web/src/components/sidebar/SessionCard.tsx

@@ -0,0 +1,264 @@
+// docs/SIDEBAR.md: a session card is always two lines — the name, then the
+// adaptive meta line — with the activity rail in the gutter beside them.
+
+import { useEffect, useRef, type MouseEvent } from "react";
+
+import {
+  activityDurationLabel,
+  activityHeldMs,
+  META_LINE_MIN_HOLD_MS,
+} from "../../activity.js";
+import { splitCommand, toolIconSvg } from "../../toolIcon.js";
+import type { InTheWay, Session } from "../../types.js";
+import {
+  blockerStats,
+  customSessionName,
+  formatInTheWay,
+  isProvisionalName,
+  MAX_SESSION_NAME_LEN,
+  normalizeSessionName,
+  sessionBlockers,
+  sessionName,
+} from "../../types.js";
+import { ActivityRail, DURATION_CLASS, stateWordFor } from "./ActivityRail.js";
+import { activityColorSlug } from "../../activity.js";
+
+export interface SessionCardProps {
+  session: Session;
+  /** Nesting depth; the row's padding (and so the rail) shifts outward with it. */
+  depth: number;
+  /** Clock the duration is measured against — the sidebar ticks it. */
+  now: number;
+  highlighted: boolean;
+  /** Showing in the focused pane. */
+  active: boolean;
+  /** Open in some pane, not the focused one. */
+  open: boolean;
+  previewing: boolean;
+  renaming: boolean;
+  onSelect(): void;
+  onOpenMenu(x: number, y: number): void;
+  onSpawnSimilar(): void;
+  onKill(): void;
+  onRenameCommit(name: string): void;
+  onRenameCancel(): void;
+}
+
+/** The fill ladder from docs/SIDEBAR.md "Which row is filled", furthest down
+ * wins. Written as one ordered run so the precedence is the order it reads in. */
+function rowFill(p: SessionCardProps): string {
+  if (p.active) return "bg-accent-fill";
+  if (p.previewing) return "bg-preview-tint";
+  if (p.open) return "bg-accent/[0.06]";
+  if (p.highlighted) return "bg-preview-tint";
+  return "";
+}
+
+export function SessionCard(props: SessionCardProps) {
+  const { session: s, depth, now, renaming } = props;
+  const name = sessionName(s);
+  const running = s.status === "Running";
+  const word = stateWordFor(s.activity);
+
+  return (
+    <a
+      className={`session-card tree-leaf relative flex flex-col gap-[1px] py-sp-1 pr-sp-2 no-underline ${rowFill(props)} ${
+        running ? "" : "opacity-60"
+      }`}
+      href={`#/attach/${encodeURIComponent(s.id)}`}
+      style={{ paddingLeft: depth * 16 + 8 }}
+      data-session-id={s.id}
+      data-nav-key={`session:${s.id}`}
+      data-status={running ? "running" : "dead"}
+      data-highlighted={props.highlighted ? "true" : undefined}
+      aria-label={`${name}, ${running ? "running" : "exited"}, ${word}`}
+      onClick={(e) => {
+        if (renaming) return;
+        e.preventDefault();
+        props.onSelect();
+      }}
+      onContextMenu={(e: MouseEvent) => {
+        e.preventDefault();
+        e.stopPropagation();
+        props.onOpenMenu(e.clientX, e.clientY);
+      }}
+    >
+      <ActivityRail activity={s.activity} />
+      <span className="flex min-w-0 items-center gap-sp-2">
+        {renaming ? (
+          <RenameField
+            session={s}
+            onCommit={props.onRenameCommit}
+            onCancel={props.onRenameCancel}
+          />
+        ) : (
+          <span
+            className={`min-w-0 flex-1 truncate text-fs-13 ${
+              isProvisionalName(s) ? "text-muted" : "text-ink"
+            }`}
+          >
+            {name}
+          </span>
+        )}
+        <span className="flex flex-none items-center gap-[2px]">
+          <button
+            type="button"
+            className="leaf-clone text-faint hover:text-ink"
+            title="Spawn similar"
+            aria-label={`Spawn similar to ${name}`}
+            onClick={(e) => {
+              e.preventDefault();
+              e.stopPropagation();
+              props.onSpawnSimilar();
+            }}
+          >
+            ⧉
+          </button>
+          <button
+            type="button"
+            className="leaf-kill text-faint hover:text-danger"
+            title="Kill session"
+            aria-label={`Kill ${name}`}
+            onClick={(e) => {
+              e.preventDefault();
+              e.stopPropagation();
+              props.onKill();
+            }}
+          >
+            ✕
+          </button>
+        </span>
+      </span>
+      <MetaLine session={s} now={now} />
+    </a>
+  );
+}
+
+/** Line 2, left to right: `[duration] [detail] command [diff stat | exited]`.
+ * The line itself is unconditional; only its fragments are adaptive. */
+export function MetaLine({ session: s, now }: { session: Session; now: number }) {
+  const slug = activityColorSlug(s.activity ?? "Idle");
+  const held = activityHeldMs(s.activity_since, now);
+  const duration =
+    held !== null && held >= META_LINE_MIN_HOLD_MS ? activityDurationLabel(held) : null;
+  const blockers = sessionBlockers(s);
+
+  return (
+    <span
+      className="card-line2 flex min-w-0 items-center gap-sp-2 text-fs-11"
+      data-activity={slug}
+    >
+      {duration && (
+        <span className={`activity-duration flex-none ${DURATION_CLASS[slug] ?? "text-muted"}`}>
+          {duration}
+        </span>
+      )}
+      {s.activity_detail && (
+        <span className="activity-detail min-w-0 flex-1 truncate text-faint">
+          {s.activity_detail}
+        </span>
+      )}
+      <CommandFragment command={s.command} />
+      {blockers && <BlockedFragment blockers={blockers} />}
+      {s.status === "Dead" && <span className="flex-none text-faint">exited</span>}
+    </span>
+  );
+}
+
+/** docs/SIDEBAR.md: the card names the program only, as its tool mark when we
+ * have one. The full command line stays in the tooltip either way. */
+function CommandFragment({ command }: { command: string }) {
+  const { tool, program } = splitCommand(command);
+  const icon = tool ? toolIconSvg(tool) : null;
+  return (
+    <span
+      className="leaf-cmd flex min-w-0 flex-none items-center gap-[4px] truncate text-faint"
+      title={command}
+    >
+      {icon ? (
+        <span className="contents" dangerouslySetInnerHTML={{ __html: icon }} />
+      ) : (
+        <span className="truncate">{program}</span>
+      )}
+    </span>
+  );
+}
+
+/** Blocked work in diff notation — `+124 -18 ?3 ↑2`. Only `+` and `-` take
+ * colour; the spelled-out breakdown survives as the tooltip. */
+function BlockedFragment({ blockers }: { blockers: InTheWay }) {
+  const stats = blockerStats(blockers);
+  return (
+    <span
+      className="leaf-blocked flex flex-none items-center gap-[4px] text-faint"
+      title={`Kill will be refused unless forced — ${formatInTheWay(blockers)}`}
+    >
+      {stats.map((st) => (
+        <span
+          key={st.kind}
+          data-stat={st.kind}
+          className={
+            st.kind === "add" ? "text-live" : st.kind === "del" ? "text-danger" : "text-muted"
+          }
+        >
+          {st.text}
+        </span>
+      ))}
+    </span>
+  );
+}
+
+/** Inline rename (#125): Enter commits, Escape and blur cancel, an emptied
+ * field clears the name so the command fallback resumes. It starts from the
+ * session's own name, never from the command it falls back to. */
+function RenameField({
+  session: s,
+  onCommit,
+  onCancel,
+}: {
+  session: Session;
+  onCommit(name: string): void;
+  onCancel(): void;
+}) {
+  const ref = useRef<HTMLInputElement>(null);
+  const settled = useRef(false);
+
+  useEffect(() => {
+    ref.current?.focus();
+    ref.current?.select();
+  }, []);
+
+  return (
+    <input
+      ref={ref}
+      type="text"
+      className="leaf-rename min-w-0 flex-1 bg-surface-2 text-fs-13 text-ink"
+      defaultValue={customSessionName(s) ?? ""}
+      maxLength={MAX_SESSION_NAME_LEN}
+      aria-label={`Rename ${sessionName(s)}`}
+      // The card is an <a> the tree also drags from: without these, clicking
+      // into the field navigates away or starts a drag.
+      onClick={(e) => e.stopPropagation()}
+      onPointerDown={(e) => e.stopPropagation()}
+      onKeyDown={(e) => {
+        e.stopPropagation();
+        if (e.key === "Enter") {
+          e.preventDefault();
+          if (settled.current) return;
+          settled.current = true;
+          onCommit(normalizeSessionName(e.currentTarget.value));
+        } else if (e.key === "Escape") {
+          e.preventDefault();
+          if (settled.current) return;
+          settled.current = true;
+          onCancel();
+        }
+      }}
+      onBlur={() => {
+        if (settled.current) return;
+        settled.current = true;
+        onCancel();
+      }}
+    />
+  );
+}

web/src/components/sidebar/Sidebar.test.tsx

@@ -0,0 +1,227 @@
+// @vitest-environment happy-dom
+import { cleanup, fireEvent, render, screen } from "@testing-library/react";
+import { afterEach, describe, expect, it, vi } from "vitest";
+
+import type { Session } from "../../types.js";
+import { Sidebar } from "./Sidebar.js";
+
+afterEach(() => {
+  cleanup();
+  vi.useRealTimers();
+});
+
+function session(id: string, over: Partial<Session> = {}): Session {
+  return {
+    id,
+    cwd: "/home/n/alpha",
+    command: "hx src/",
+    env: {},
+    metadata: { name: id },
+    status: "Running",
+    created_at: "2026-08-24T10:00:00Z",
+    ...over,
+  } as Session;
+}
+
+/** The card element for a session, by the `data-session-id` the row carries. */
+function card(id: string): HTMLElement {
+  const el = document.querySelector<HTMLElement>(`[data-session-id="${id}"]`);
+  if (!el) throw new Error(`no card for ${id}`);
+  return el;
+}
+
+function tree(): HTMLElement {
+  return document.querySelector<HTMLElement>(".tree")!;
+}
+
+describe("SessionCard layout", () => {
+  it("renders two lines: the name, then a meta line naming the program", () => {
+    render(<Sidebar sessions={[session("alpha")]} />);
+
+    const row = card("alpha");
+    expect(row.textContent).toContain("alpha");
+    const meta = row.querySelector(".card-line2")!;
+    // The program only — never its arguments.
+    expect(meta.textContent).toContain("hx");
+    expect(meta.textContent).not.toContain("src/");
+  });
+
+  it("shows no duration under the 30s hold, and one above it", () => {
+    const now = Date.parse("2026-08-24T10:00:00Z");
+    vi.setSystemTime(now);
+    const fresh = session("fresh", { activity: "Active", activity_since: "2026-08-24T09:59:50Z" });
+    const held = session("held", { activity: "Active", activity_since: "2026-08-24T09:56:00Z" });
+
+    render(<Sidebar sessions={[fresh, held]} />);
+
+    expect(card("fresh").querySelector(".activity-duration")).toBeNull();
+    expect(card("held").querySelector(".activity-duration")!.textContent).toBe("4m");
+  });
+
+  it("paints a rail for every state, blinking on AwaitingInput and flashing on Error", () => {
+    render(
+      <Sidebar
+        sessions={[
+          session("idle"),
+          session("await", { activity: "AwaitingInput" }),
+          session("err", { activity: "Error" }),
+        ]}
+      />,
+    );
+
+    const rail = (id: string) => card(id).querySelector<HTMLElement>("[data-activity]")!;
+    expect(rail("idle").dataset.activity).toBe("idle");
+    expect(rail("idle").className).not.toContain("rail-");
+    expect(rail("await").className).toContain("rail-blink");
+    expect(rail("err").className).toContain("rail-flash");
+    // Status never rests on colour alone.
+    expect(rail("await").getAttribute("aria-label")).toBe("Awaiting input");
+  });
+
+  it("renders blocked work as diff notation with the spelled-out tooltip", () => {
+    render(
+      <Sidebar
+        sessions={[
+          session("alpha", {
+            blocked_work: { uncommitted_files: 2, insertions: 124, deletions: 18, untracked_files: 3 },
+          }),
+        ]}
+      />,
+    );
+
+    const blocked = card("alpha").querySelector<HTMLElement>(".leaf-blocked")!;
+    expect(blocked.textContent).toBe("+124-18?3");
+    expect(blocked.title).toContain("2 uncommitted files");
+  });
+
+  it("dims a provisional name and leaves a settled one alone", () => {
+    render(
+      <Sidebar
+        sessions={[
+          session("gen", { metadata: { name: "gen", name_source: "Generated" } }),
+          session("user", { metadata: { name: "user", name_source: "User" } }),
+        ]}
+      />,
+    );
+
+    expect(card("gen").querySelector(".text-muted")).not.toBeNull();
+    expect(card("user").textContent).toContain("user");
+  });
+});
+
+describe("keyboard walk", () => {
+  const two = [session("a", { cwd: "/one" }), session("b", { cwd: "/two" })];
+
+  it("j and k step the highlight through the cards", () => {
+    render(<Sidebar sessions={two} />);
+
+    fireEvent.keyDown(tree(), { key: "j" });
+    expect(card("a").dataset.highlighted).toBe("true");
+    fireEvent.keyDown(tree(), { key: "j" });
+    expect(card("b").dataset.highlighted).toBe("true");
+    fireEvent.keyDown(tree(), { key: "k" });
+    expect(card("a").dataset.highlighted).toBe("true");
+  });
+
+  it("stops on a collapsed folder header and Enter expands onto its first card", () => {
+    render(<Sidebar sessions={two} />);
+
+    const header = document.querySelector<HTMLElement>('[data-nav-key="folder:one"]')!;
+    fireEvent.click(header);
+    expect(header.getAttribute("aria-expanded")).toBe("false");
+
+    fireEvent.keyDown(tree(), { key: "j" });
+    expect(
+      document.querySelector<HTMLElement>('[data-nav-key="folder:one"]')!.dataset.highlighted,
+    ).toBe("true");
+
+    fireEvent.keyDown(tree(), { key: "Enter" });
+    expect(card("a").dataset.highlighted).toBe("true");
+  });
+
+  it("Enter on a card opens it, and Tab hands the keyboard to the pane", () => {
+    const onSelect = vi.fn();
+    const onFocusPane = vi.fn();
+    render(<Sidebar sessions={two} onSelect={onSelect} onFocusPane={onFocusPane} />);
+
+    fireEvent.keyDown(tree(), { key: "j" });
+    fireEvent.keyDown(tree(), { key: "Enter" });
+    expect(onSelect).toHaveBeenCalledWith("a");
+
+    fireEvent.keyDown(tree(), { key: "Tab" });
+    expect(onFocusPane).toHaveBeenCalled();
+  });
+
+  it("previews the session the walk lands on", () => {
+    const onPreview = vi.fn();
+    render(<Sidebar sessions={two} onPreview={onPreview} />);
+
+    fireEvent.keyDown(tree(), { key: "j" });
+    expect(onPreview).toHaveBeenCalledWith("a");
+  });
+
+  it("x asks to kill the highlighted session and r renames it", () => {
+    const onKill = vi.fn();
+    render(<Sidebar sessions={two} onKill={onKill} />);
+
+    fireEvent.keyDown(tree(), { key: "j" });
+    fireEvent.keyDown(tree(), { key: "x" });
+    expect(onKill).toHaveBeenCalledWith(expect.objectContaining({ id: "a" }));
+
+    fireEvent.keyDown(tree(), { key: "r" });
+    expect(card("a").querySelector(".leaf-rename")).not.toBeNull();
+  });
+});
+
+describe("context menu", () => {
+  it("offers rename, spawn similar and kill", () => {
+    const onSpawnSimilar = vi.fn();
+    const onKill = vi.fn();
+    render(
+      <Sidebar sessions={[session("alpha")]} onSpawnSimilar={onSpawnSimilar} onKill={onKill} />,
+    );
+
+    fireEvent.contextMenu(card("alpha"));
+    const labels = [...document.querySelectorAll('[role="menuitem"]')].map((n) => n.textContent);
+    expect(labels).toEqual(["Rename…", "Spawn similar", "Kill session"]);
+
+    fireEvent.click(screen.getByText("Spawn similar"));
+    expect(onSpawnSimilar).toHaveBeenCalledWith(expect.objectContaining({ id: "alpha" }));
+  });
+
+  it("renames in place: Enter commits the field, Escape cancels", () => {
+    const onRename = vi.fn();
+    render(<Sidebar sessions={[session("alpha")]} onRename={onRename} />);
+
+    fireEvent.contextMenu(card("alpha"));
+    fireEvent.click(screen.getByText("Rename…"));
+
+    const input = card("alpha").querySelector<HTMLInputElement>(".leaf-rename")!;
+    expect(input.value).toBe("alpha");
+    fireEvent.change(input, { target: { value: "  renamed  " } });
+    fireEvent.keyDown(input, { key: "Enter" });
+    expect(onRename).toHaveBeenCalledWith("alpha", "renamed");
+    expect(card("alpha").querySelector(".leaf-rename")).toBeNull();
+  });
+});
+
+describe("search", () => {
+  it("filters the tree down to matching sessions", () => {
+    render(<Sidebar sessions={[session("alpha"), session("beta", { cwd: "/home/n/beta" })]} />);
+
+    fireEvent.change(screen.getByLabelText("Search sessions"), { target: { value: "beta" } });
+
+    expect(document.querySelector('[data-session-id="alpha"]')).toBeNull();
+    expect(document.querySelector('[data-session-id="beta"]')).not.toBeNull();
+  });
+});
+
+describe("empty state", () => {
+  it("offers a spawn when there are no sessions at all", () => {
+    const onSpawn = vi.fn();
+    render(<Sidebar sessions={[]} onSpawn={onSpawn} />);
+
+    fireEvent.click(screen.getByText("+ Spawn session"));
+    expect(onSpawn).toHaveBeenCalled();
+  });
+});

web/src/components/sidebar/Sidebar.tsx

@@ -0,0 +1,368 @@
+// React port of the sidebar tree (catalog.ts). The contract it renders is
+// docs/SIDEBAR.md: two-line cards behind an activity rail, folder-grouped by
+// repository, walked with j/k.
+
+import { useCallback, useEffect, useMemo, useRef, useState } from "react";
+import { useStore } from "zustand";
+
+import { ApiRequestError, killSession, renameSession } from "../../api.js";
+import type { CatalogStore, CatalogStoreApi } from "../../stores/catalogStore.js";
+import type { InTheWay, Session } from "../../types.js";
+import { sessionBlockers, sessionName } from "../../types.js";
+import { buildTree, type TreeNode } from "../../tree.js";
+import { ContextMenu, type ContextMenuItem } from "./ContextMenu.js";
+import { FolderNode } from "./FolderNode.js";
+import { KillConfirm } from "./KillConfirm.js";
+import { SessionCard } from "./SessionCard.js";
+import { SidebarSearch } from "./SidebarSearch.js";
+import { filterSessions, firstRowUnder, navRows, sessionKey } from "./model.js";
+import { useNow } from "./useNow.js";
+import "./sidebar.css";
+
+export interface SidebarProps {
+  /** Live catalog. Either this or `sessions` supplies the tree. */
+  store?: CatalogStoreApi;
+  /** Static session list — what tests and the design kit render from. */
+  sessions?: Session[];
+  /** The daemon's home dir, so cwds abbreviate to `~/…`. */
+  homeDir?: string;
+  /** Showing in the focused pane. */
+  activeId?: string | null;
+  /** Open in some pane, focused one included. */
+  openIds?: ReadonlySet<string>;
+  /** Previewing (docs/PREVIEW.md) — a view, never durable state. */
+  previewId?: string | null;
+  onSelect?(id: string): void;
+  /** The highlight moved onto a session, or off every session. */
+  onPreview?(id: string | null): void;
+  onSpawnSimilar?(session: Session): void;
+  onSpawn?(): void;
+  /** Fast-forward spawn (`N`). */
+  onSpawnDefaults?(): void;
+  /** Tab: hand the keyboard back to the pane. */
+  onFocusPane?(): void;
+  onHelp?(): void;
+  /** Overrides the built-in `DELETE /api/sessions/:id` flow (tests, kit). */
+  onKill?(session: Session): void;
+  /** Overrides the built-in `PATCH /api/sessions/:id` (tests, kit). */
+  onRename?(id: string, name: string): void;
+}
+
+interface MenuState {
+  x: number;
+  y: number;
+  session: Session;
+}
+
+interface KillState {
+  session: Session;
+  blockers: InTheWay | null;
+  force: boolean;
+}
+
+export function Sidebar(props: SidebarProps) {
+  const sessions = useSessions(props);
+  const now = useNow();
+
+  const [query, setQuery] = useState("");
+  const [collapsed, setCollapsed] = useState<ReadonlySet<string>>(() => new Set<string>());
+  const [navKey, setNavKey] = useState<string | null>(null);
+  const [renamingId, setRenamingId] = useState<string | null>(null);
+  const [menu, setMenu] = useState<MenuState | null>(null);
+  const [kill, setKill] = useState<KillState | null>(null);
+  const treeRef = useRef<HTMLDivElement>(null);
+
+  const tree = useMemo(
+    () => buildTree(filterSessions(sessions, query), props.homeDir),
+    [sessions, query, props.homeDir],
+  );
+  const rows = useMemo(() => navRows(tree, collapsed), [tree, collapsed]);
+
+  // A row that went away — session killed, folder collapsed over it — drops
+  // the highlight rather than leaving it pointing at nothing.
+  useEffect(() => {
+    if (navKey !== null && !rows.some((r) => r.key === navKey)) setNavKey(null);
+  }, [rows, navKey]);
+
+  const preview = props.onPreview;
+  const previewOf = useCallback(
+    (key: string | null) => {
+      preview?.(key?.startsWith("session:") ? key.slice("session:".length) : null);
+    },
+    [preview],
+  );
+
+  const moveNav = useCallback(
+    (delta: number) => {
+      if (rows.length === 0) return;
+      const cur = rows.findIndex((r) => r.key === navKey);
+      // Nothing highlighted: start one off the end being walked from, so the
+      // first step lands on the first (or last) row.
+      const from = cur === -1 ? (delta > 0 ? -1 : 0) : cur;
+      const next = rows[(((from + delta) % rows.length) + rows.length) % rows.length];
+      setNavKey(next.key);
+      previewOf(next.key);
+    },
+    [rows, navKey, previewOf],
+  );
+
+  const toggleFolder = useCallback((path: string) => {
+    setCollapsed((prev) => {
+      const next = new Set(prev);
+      if (next.has(path)) next.delete(path);
+      else next.add(path);
+      return next;
+    });
+  }, []);
+
+  /** Enter: open the highlighted session, or expand the highlighted folder and
+   * land on the first row it was hiding. */
+  const activateNav = useCallback(() => {
+    const row = rows.find((r) => r.key === navKey);
+    if (!row) return;
+    if (row.kind === "session") {
+      props.onSelect?.(row.id);
+      return;
+    }
+    const expanded = new Set(collapsed);
+    expanded.delete(row.path);
+    setCollapsed(expanded);
+    const revealed = firstRowUnder(tree, expanded, row.path);
+    setNavKey(revealed?.key ?? null);
+  }, [rows, navKey, collapsed, tree, props]);
+
+  const beginKill = useCallback(
+    (s: Session) => {
+      if (props.onKill) {
+        props.onKill(s);
+        return;
+      }
+      setKill({ session: s, blockers: sessionBlockers(s), force: false });
+    },
+    [props],
+  );
+
+  const commitRename = useCallback(
+    (id: string, name: string) => {
+      setRenamingId(null);
+      if (props.onRename) props.onRename(id, name);
+      else void renameSession(id, name).catch(() => {});
+    },
+    [props],
+  );
+
+  /** The session behind the highlighted row, when the highlight is on a card. */
+  const highlightedSession = useCallback((): Session | undefined => {
+    const row = rows.find((r) => r.key === navKey);
+    if (row?.kind !== "session") return undefined;
+    return sessions.find((s) => s.id === row.id);
+  }, [rows, navKey, sessions]);
+
+  const onKeyDown = (e: React.KeyboardEvent) => {
+    // The inline rename field owns its own keys; the walk stays out of it.
+    if (e.target instanceof HTMLInputElement) return;
+    switch (e.key) {
+      case "j":
+      case "ArrowDown":
+        e.preventDefault();
+        moveNav(1);
+        return;
+      case "k":
+      case "ArrowUp":
+        e.preventDefault();
+        moveNav(-1);
+        return;
+      case "Enter":
+        e.preventDefault();
+        activateNav();
+        return;
+      case "Tab":
+        e.preventDefault();
+        props.onFocusPane?.();
+        return;
+      case "c": {
+        const row = rows.find((r) => r.key === navKey);
+        if (row?.kind !== "folder") return;
+        e.preventDefault();
+        toggleFolder(row.path);
+        return;
+      }
+      case "r": {
+        const s = highlightedSession();
+        if (!s) return;
+        e.preventDefault();
+        setRenamingId(s.id);
+        return;
+      }
+      case "x": {
+        const s = highlightedSession();
+        if (!s) return;
+        e.preventDefault();
+        beginKill(s);
+        return;
+      }
+      case "n":
+        e.preventDefault();
+        props.onSpawn?.();
+        return;
+      case "N":
+        e.preventDefault();
+        props.onSpawnDefaults?.();
+        return;
+      case "?":
+        e.preventDefault();
+        props.onHelp?.();
+        return;
+    }
+  };
+
+  const menuItems = (s: Session): ContextMenuItem[] => [
+    { label: "Rename…", onSelect: () => setRenamingId(s.id) },
+    { label: "Spawn similar", onSelect: () => props.onSpawnSimilar?.(s) },
+    { label: "Kill session", danger: true, onSelect: () => beginKill(s) },
+  ];
+
+  const renderNode = (node: TreeNode, depth: number): React.ReactNode => {
+    if (node.kind === "leaf") {
+      const s = node.session;
+      return (
+        <SessionCard
+          key={s.id}
+          session={s}
+          depth={depth}
+          now={now}
+          highlighted={navKey === sessionKey(s.id)}
+          active={props.activeId === s.id}
+          open={(props.openIds?.has(s.id) ?? false) && props.activeId !== s.id}
+          previewing={props.previewId === s.id && props.activeId !== s.id}
+          renaming={renamingId === s.id}
+          onSelect={() => props.onSelect?.(s.id)}
+          onOpenMenu={(x, y) => setMenu({ x, y, session: s })}
+          onSpawnSimilar={() => props.onSpawnSimilar?.(s)}
+          onKill={() => beginKill(s)}
+          onRenameCommit={(name) => commitRename(s.id, name)}
+          onRenameCancel={() => setRenamingId(null)}
+        />
+      );
+    }
+    if (!node.name) {
+      return node.children.map((c) => renderNode(c, depth));
+    }
+    return (
+      <FolderNode
+        key={node.path}
+        name={node.name}
+        path={node.path}
+        depth={depth}
+        collapsed={collapsed.has(node.path)}
+        highlighted={navKey === `folder:${node.path}`}
+        onToggle={() => toggleFolder(node.path)}
+      >
+        {node.children.map((c) => renderNode(c, depth + 1))}
+      </FolderNode>
+    );
+  };
+
+  return (
+    <aside className="sidebar flex h-full min-h-0 flex-col bg-surface">
+      <SidebarSearch
+        value={query}
+        onChange={setQuery}
+        onDismiss={() => treeRef.current?.focus()}
+      />
+      <div
+        ref={treeRef}
+        className="tree min-h-0 flex-1 overflow-y-auto outline-none"
+        tabIndex={-1}
+        role="tree"
+        aria-label="Sessions"
+        onKeyDown={onKeyDown}
+        // The keyboard walk's preview belongs to the list holding the
+        // keyboard: once it doesn't, the pane goes back to what was opened.
+        onBlur={() => preview?.(null)}
+      >
+        {sessions.length === 0 ? (
+          <EmptyState onSpawn={() => props.onSpawn?.()} />
+        ) : (
+          renderNode(tree, 0)
+        )}
+      </div>
+      {menu && (
+        <ContextMenu
+          x={menu.x}
+          y={menu.y}
+          items={menuItems(menu.session)}
+          onClose={() => setMenu(null)}
+        />
+      )}
+      {kill && (
+        <KillConfirm
+          name={sessionName(kill.session)}
+          blockers={kill.blockers}
+          force={kill.force}
+          onCancel={() => setKill(null)}
+          onConfirm={() => {
+            const { session: s, force } = kill;
+            setKill(null);
+            void killSession(s.id, force).catch((e: unknown) => {
+              // The daemon refuses an unforced kill over a worktree holding
+              // unsaved work; that refusal needs its own prompt
+              // (docs/WORKTREES.md).
+              if (e instanceof ApiRequestError && e.code === "kill_guarded") {
+                setKill({
+                  session: s,
+                  blockers: e.unsavedWork ?? sessionBlockers(s),
+                  force: true,
+                });
+              }
+            });
+          }}
+        />
+      )}
+    </aside>
+  );
+}
+
+/** The tree's one empty state: no sessions at all. */
+function EmptyState({ onSpawn }: { onSpawn(): void }) {
+  return (
+    <div className="empty flex flex-col items-center gap-sp-2 p-sp-6 text-center">
+      <div aria-hidden="true" className="text-fs-20 text-faint">
+        +
+      </div>
+      <div className="text-fs-13 text-ink">No sessions yet</div>
+      <p className="text-fs-12 text-muted">Start your first session — it'll show up here.</p>
+      <button
+        type="button"
+        className="rounded-r-1 bg-accent px-sp-3 py-sp-1 text-fs-12 text-accent-ink"
+        onClick={onSpawn}
+      >
+        + Spawn session
+      </button>
+    </div>
+  );
+}
+
+/** Sessions from the store when one is wired, else the static prop. */
+function useSessions(props: SidebarProps): Session[] {
+  const fromStore = useStore(
+    // `useStore` needs a store every render; the no-store case is served by a
+    // stable empty stand-in whose result is thrown away below.
+    props.store ?? EMPTY_STORE,
+    (s: CatalogStore) => s.sessions,
+  );
+  return useMemo(
+    () => (props.store ? [...fromStore.values()] : (props.sessions ?? [])),
+    [props.store, props.sessions, fromStore],
+  );
+}
+
+// One frozen state object, not a fresh one per call: `useStore` reads the
+// snapshot on every render and a new Map each time would never settle.
+const EMPTY_STATE = { sessions: new Map<string, Session>() };
+const EMPTY_STORE = {
+  getState: () => EMPTY_STATE,
+  getInitialState: () => EMPTY_STATE,
+  setState: () => {},
+  subscribe: () => () => {},
+} as unknown as CatalogStoreApi;

web/src/components/sidebar/SidebarSearch.tsx

@@ -0,0 +1,34 @@
+// The sidebar's search field: a substring filter over the tree (name, command
+// and cwd). Escape clears it and hands the keyboard back to the list.
+
+export interface SidebarSearchProps {
+  value: string;
+  onChange(value: string): void;
+  /** Escape on an already-empty field — the list wants the keyboard back. */
+  onDismiss?(): void;
+}
+
+export function SidebarSearch({ value, onChange, onDismiss }: SidebarSearchProps) {
+  return (
+    <header className="sidebar-search p-sp-2">
+      <input
+        type="search"
+        className="search w-full rounded-r-1 border border-border bg-surface-2 px-sp-2 py-sp-1 text-fs-12 text-ink"
+        placeholder="Search sessions…"
+        aria-label="Search sessions"
+        autoComplete="off"
+        autoCorrect="off"
+        autoCapitalize="off"
+        spellCheck={false}
+        value={value}
+        onChange={(e) => onChange(e.currentTarget.value)}
+        onKeyDown={(e) => {
+          if (e.key !== "Escape") return;
+          e.preventDefault();
+          if (value) onChange("");
+          else onDismiss?.();
+        }}
+      />
+    </header>
+  );
+}

web/src/components/sidebar/index.ts

@@ -0,0 +1,8 @@
+export { Sidebar, type SidebarProps } from "./Sidebar.js";
+export { SessionCard, type SessionCardProps } from "./SessionCard.js";
+export { FolderNode, type FolderNodeProps } from "./FolderNode.js";
+export { SidebarSearch, type SidebarSearchProps } from "./SidebarSearch.js";
+export { ActivityRail } from "./ActivityRail.js";
+export { ContextMenu, type ContextMenuItem } from "./ContextMenu.js";
+export { KillConfirm } from "./KillConfirm.js";
+export * from "./model.js";

web/src/components/sidebar/model.test.ts

@@ -0,0 +1,62 @@
+import { describe, expect, it } from "vitest";
+
+import { buildTree } from "../../tree.js";
+import type { Session } from "../../types.js";
+import { filterSessions, firstRowUnder, navRows, splitFolderLabel } from "./model.js";
+
+function session(id: string, cwd: string, command = "claude"): Session {
+  return {
+    id,
+    cwd,
+    command,
+    env: {},
+    metadata: {},
+    status: "Running",
+    created_at: "2026-08-24T10:00:00Z",
+  } as Session;
+}
+
+describe("navRows", () => {
+  const tree = buildTree([session("a", "/one"), session("b", "/two")], undefined);
+
+  it("stops on every card and skips expanded folder headers", () => {
+    expect(navRows(tree, new Set()).map((r) => r.key)).toEqual(["session:a", "session:b"]);
+  });
+
+  it("stops on a collapsed folder header instead of the cards it hides", () => {
+    expect(navRows(tree, new Set(["one"])).map((r) => r.key)).toEqual([
+      "folder:one",
+      "session:b",
+    ]);
+  });
+
+  it("names the first row an expanded folder reveals", () => {
+    expect(firstRowUnder(tree, new Set(), "one")?.key).toBe("session:a");
+  });
+});
+
+describe("splitFolderLabel", () => {
+  it("keeps a shallow path whole", () => {
+    expect(splitFolderLabel("~/maestro")).toEqual({ stem: null, last: "~/maestro" });
+  });
+
+  it("initials the leading segments of a deep path", () => {
+    expect(splitFolderLabel("~/git.naps.pt/naps62/maestro")).toEqual({
+      stem: "~/g/n",
+      last: "maestro",
+    });
+  });
+});
+
+describe("filterSessions", () => {
+  const all = [session("a", "/home/n/alpha", "claude"), session("b", "/home/n/beta", "bash")];
+
+  it("returns everything for a blank query", () => {
+    expect(filterSessions(all, "  ")).toHaveLength(2);
+  });
+
+  it("matches the cwd and the command, case-insensitively", () => {
+    expect(filterSessions(all, "ALPHA").map((s) => s.id)).toEqual(["a"]);
+    expect(filterSessions(all, "bash").map((s) => s.id)).toEqual(["b"]);
+  });
+});

web/src/components/sidebar/model.ts

@@ -0,0 +1,90 @@
+// Pure model helpers behind the React sidebar. Kept out of the components so
+// the walk order and the folder label can be tested without a DOM.
+
+import type { Session } from "../../types.js";
+import { sessionCwd, sessionName } from "../../types.js";
+import type { TreeNode } from "../../tree.js";
+
+/** A row the keyboard walk can land on (docs/SIDEBAR.md "Keyboard walk"):
+ * every session card, and a folder header only while it is collapsed. */
+export type NavRow =
+  | { key: string; kind: "folder"; path: string }
+  | { key: string; kind: "session"; id: string };
+
+export function folderKey(path: string): string {
+  return `folder:${path}`;
+}
+
+export function sessionKey(id: string): string {
+  return `session:${id}`;
+}
+
+/** The walkable rows in visual order. An expanded folder contributes nothing
+ * itself — its cards are one row away — while a collapsed one is the only row
+ * it has, so skipping it would leave the folder unreachable. */
+export function navRows(root: TreeNode, collapsed: ReadonlySet<string>): NavRow[] {
+  const out: NavRow[] = [];
+  const walk = (node: TreeNode): void => {
+    if (node.kind === "leaf") {
+      out.push({ key: sessionKey(node.session.id), kind: "session", id: node.session.id });
+      return;
+    }
+    if (node.name && collapsed.has(node.path)) {
+      out.push({ key: folderKey(node.path), kind: "folder", path: node.path });
+      return;
+    }
+    for (const child of node.children) walk(child);
+  };
+  for (const child of root.kind === "folder" ? root.children : [root]) walk(child);
+  return out;
+}
+
+/** The first walkable row inside `path`, i.e. where the highlight lands when
+ * Enter expands that folder. */
+export function firstRowUnder(
+  root: TreeNode,
+  collapsed: ReadonlySet<string>,
+  path: string,
+): NavRow | undefined {
+  const found = findFolder(root, path);
+  if (!found) return undefined;
+  return navRows({ ...found, name: "" }, collapsed)[0];
+}
+
+function findFolder(node: TreeNode, path: string): Extract<TreeNode, { kind: "folder" }> | null {
+  if (node.kind === "leaf") return null;
+  if (node.path === path && node.name) return node;
+  for (const child of node.children) {
+    const hit = findFolder(child, path);
+    if (hit) return hit;
+  }
+  return null;
+}
+
+/** Structured form of `abbreviateFolderName`: a deep path shows its leading
+ * segments as initials so the tail stays readable in a narrow sidebar. */
+export function splitFolderLabel(name: string): { stem: string | null; last: string } {
+  const parts = name.split("/");
+  if (parts.length <= 2) return { stem: null, last: name };
+  const last = parts[parts.length - 1];
+  const stem = parts
+    .slice(0, -1)
+    .map((p) => (p === "~" ? "~" : (Array.from(p)[0] ?? "")))
+    .join("/");
+  return { stem, last };
+}
+
+/** Case-insensitive substring filter over a session's name, command and cwd —
+ * what the sidebar's own search field narrows the tree with. */
+export function filterSessions(sessions: Session[], query: string): Session[] {
+  const q = query.trim().toLowerCase();
+  if (!q) return sessions;
+  return sessions.filter((s) => {
+    const cwd = sessionCwd(s) ?? "";
+    return (
+      sessionName(s).toLowerCase().includes(q) ||
+      s.command.toLowerCase().includes(q) ||
+      cwd.toLowerCase().includes(q)
+    );
+  });
+}

web/src/components/sidebar/sidebar.css

@@ -0,0 +1,49 @@
+/* Motion for the activity rail (docs/SIDEBAR.md): a hard blink while
+   AwaitingInput, a fast flash while Error. Active and Idle are solid and
+   still — colour alone is the signal. Kept as real CSS rather than Tailwind
+   utilities because both need @keyframes of their own. */
+
+@keyframes maestro-rail-blink {
+  0%,
+  50% {
+    opacity: 1;
+  }
+  50.01%,
+  100% {
+    opacity: 0;
+  }
+}
+
+@keyframes maestro-rail-flash {
+  0%,
+  100% {
+    opacity: 1;
+  }
+  15% {
+    opacity: 0.25;
+  }
+  30% {
+    opacity: 1;
+  }
+  45% {
+    opacity: 0.25;
+  }
+  60% {
+    opacity: 1;
+  }
+}
+
+.rail-blink {
+  animation: maestro-rail-blink 1.2s steps(1) infinite;
+}
+
+.rail-flash {
+  animation: maestro-rail-flash 1.4s ease-out infinite;
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .rail-blink,
+  .rail-flash {
+    animation: none;
+  }
+}

web/src/components/sidebar/useNow.ts

@@ -0,0 +1,16 @@
+import { useEffect, useState } from "react";
+
+/** A clock that ticks at least every `intervalMs` while the page is visible.
+ * docs/SIDEBAR.md asks for a re-render at least every 30s so the duration's
+ * cutover points land within one tick. */
+export function useNow(intervalMs = 30_000): number {
+  const [now, setNow] = useState(() => Date.now());
+  useEffect(() => {
+    const id = setInterval(() => {
+      if (document.visibilityState !== "visible") return;
+      setNow(Date.now());
+    }, intervalMs);
+    return () => clearInterval(id);
+  }, [intervalMs]);
+  return now;
+}

web/src/components/spawn/BranchPicker.test.tsx

@@ -0,0 +1,79 @@
+// @vitest-environment happy-dom
+import { cleanup, fireEvent, render, screen } from "@testing-library/react";
+import { afterEach, describe, expect, it, vi } from "vitest";
+
+import type { BranchInfo } from "../../types.js";
+import { BranchPicker, type BranchPickerProps } from "./BranchPicker.js";
+
+afterEach(cleanup);
+
+function props(over: Partial<BranchPickerProps> = {}): BranchPickerProps {
+  return {
+    enabled: true,
+    onToggleEnabled: vi.fn(),
+    hint: null,
+    baseRepo: "/repo",
+    mode: "new",
+    onModeChange: vi.fn(),
+    newBranch: "",
+    onNewBranchChange: vi.fn(),
+    branches: undefined,
+    existingBranch: "",
+    onExistingBranchChange: vi.fn(),
+    ...over,
+  };
+}
+
+describe("BranchPicker", () => {
+  it("shows the hint instead of the body while unresolved", () => {
+    render(<BranchPicker {...props({ hint: "Choose a working directory first." })} />);
+    expect(screen.getByText("Choose a working directory first.")).not.toBeNull();
+    expect(screen.queryByText("New branch name")).toBeNull();
+  });
+
+  it("shows the new-branch field by default and the repo line once resolved", () => {
+    render(<BranchPicker {...props()} />);
+    expect(screen.getByText("repo: /repo")).not.toBeNull();
+    expect(screen.getByPlaceholderText("feat/foo")).not.toBeNull();
+    expect(screen.queryByText("Pick a branch")).toBeNull();
+  });
+
+  it("switches to the existing-branch select and reports the mode change", () => {
+    const onModeChange = vi.fn();
+    render(<BranchPicker {...props({ onModeChange })} />);
+
+    fireEvent.click(screen.getByLabelText("Existing branch"));
+
+    expect(onModeChange).toHaveBeenCalledWith("existing");
+  });
+
+  it("disables a branch already held by another worktree, and the main checkout's HEAD", () => {
+    const branches: BranchInfo[] = [
+      { name: "main", is_head: true },
+      { name: "feat/a", is_head: false, worktree: "/repos/a" },
+      { name: "feat/b", is_head: false },
+    ];
+    render(<BranchPicker {...props({ mode: "existing", branches })} />);
+
+    const main = screen.getByRole("option", { name: /main — held by the main checkout/ }) as HTMLOptionElement;
+    const a = screen.getByRole("option", { name: /feat\/a — held by \/repos\/a/ }) as HTMLOptionElement;
+    const b = screen.getByRole("option", { name: "feat/b" }) as HTMLOptionElement;
+    expect(main.disabled).toBe(true);
+    expect(a.disabled).toBe(true);
+    expect(b.disabled).toBe(false);
+  });
+
+  it("shows a placeholder option when no local branches were found", () => {
+    render(<BranchPicker {...props({ mode: "existing", branches: [] })} />);
+    expect(screen.getByText("No local branches found.")).not.toBeNull();
+  });
+
+  it("toggles the worktree checkbox", () => {
+    const onToggleEnabled = vi.fn();
+    render(<BranchPicker {...props({ onToggleEnabled })} />);
+
+    fireEvent.click(screen.getByLabelText("Create git worktree"));
+
+    expect(onToggleEnabled).toHaveBeenCalledWith(false);
+  });
+});

web/src/components/spawn/BranchPicker.tsx

@@ -0,0 +1,119 @@
+// The spawn form's worktree section (#61): create-worktree toggle, then
+// (once a base repo is known) new-branch-vs-existing-branch, mirroring
+// spawnForm.ts's `.adv-group`/`.wt-body`/`.wt-mode` markup.
+
+import type { BranchInfo } from "../../types.js";
+import type { WorktreeBranchMode } from "../../spawnForm.js";
+
+export interface BranchPickerProps {
+  enabled: boolean;
+  onToggleEnabled(enabled: boolean): void;
+  /** Status line shown in place of the body — "Checking…", "not a repo",
+   * "choose a directory first". `null` once the body itself can render. */
+  hint: string | null;
+  /** The repo a worktree would branch from, once resolved. */
+  baseRepo: string | null;
+  mode: WorktreeBranchMode;
+  onModeChange(mode: WorktreeBranchMode): void;
+  newBranch: string;
+  onNewBranchChange(value: string): void;
+  /** This cwd's local branches, or `undefined` while unknown/not yet loaded. */
+  branches: BranchInfo[] | undefined;
+  existingBranch: string;
+  onExistingBranchChange(value: string): void;
+}
+
+export function BranchPicker(props: BranchPickerProps) {
+  return (
+    <div
+      className={`flex flex-col gap-sp-3 border-l-2 pl-sp-3 ${
+        props.enabled ? "border-accent" : "border-border"
+      }`}
+    >
+      <label className="flex cursor-pointer items-center gap-sp-2 text-fs-14 text-ink">
+        <input
+          type="checkbox"
+          data-role="toggle"
+          className="size-[18px] accent-accent"
+          checked={props.enabled}
+          onChange={(e) => props.onToggleEnabled(e.currentTarget.checked)}
+        />
+        Create git worktree
+      </label>
+
+      {props.hint && <p className="m-0 text-fs-12 text-muted">{props.hint}</p>}
+
+      {props.enabled && !props.hint && (
+        <div className="flex flex-col gap-sp-3">
+          {props.baseRepo && (
+            <p className="m-0 font-mono text-fs-12 text-muted">repo: {props.baseRepo}</p>
+          )}
+          <div role="radiogroup" aria-label="Branch source" className="flex gap-sp-4">
+            <label className="flex cursor-pointer items-center gap-sp-2 text-fs-14 text-ink">
+              <input
+                type="radio"
+                name="worktree_branch_mode"
+                checked={props.mode === "new"}
+                onChange={() => props.onModeChange("new")}
+              />
+              New branch
+            </label>
+            <label className="flex cursor-pointer items-center gap-sp-2 text-fs-14 text-ink">
+              <input
+                type="radio"
+                name="worktree_branch_mode"
+                checked={props.mode === "existing"}
+                onChange={() => props.onModeChange("existing")}
+              />
+              Existing branch
+            </label>
+          </div>
+
+          {props.mode === "new" ? (
+            <label className="flex flex-col gap-1 text-fs-12 text-muted">
+              New branch name
+              <input
+                name="worktree_branch"
+                type="text"
+                autoComplete="off"
+                placeholder="feat/foo"
+                className="w-full rounded-r-2 border border-border bg-surface-2 px-sp-3 py-2 font-mono text-fs-15 text-ink"
+                value={props.newBranch}
+                onChange={(e) => props.onNewBranchChange(e.currentTarget.value)}
+              />
+            </label>
+          ) : (
+            <label className="flex flex-col gap-1 text-fs-12 text-muted">
+              Pick a branch
+              <select
+                className="w-full rounded-r-2 border border-border bg-surface-2 px-sp-3 py-2 font-mono text-fs-15 text-ink"
+                value={props.existingBranch}
+                onChange={(e) => props.onExistingBranchChange(e.currentTarget.value)}
+              >
+                {branchOptions(props.branches)}
+              </select>
+            </label>
+          )}
+        </div>
+      )}
+    </div>
+  );
+}
+
+function branchOptions(branches: BranchInfo[] | undefined) {
+  if (!branches || branches.length === 0) {
+    return <option value="">No local branches found.</option>;
+  }
+  return branches.map((b) => {
+    // A branch already checked out anywhere stays visible but unpickable —
+    // git refuses a second checkout. That includes the main checkout's own
+    // HEAD, which is commonly `main` and would otherwise be the default pick,
+    // making every existing-branch spawn fail (#54 review).
+    const held = b.worktree ?? (b.is_head ? "the main checkout" : null);
+    return (
+      <option key={b.name} value={b.name} disabled={held !== null} title={held ?? ""}>
+        {held ? `${b.name} — held by ${held}` : b.name}
+      </option>
+    );
+  });
+}