feat(maestro): show only the program on session cards

The command fragment named the full command line, so a session spawned
with `claude --dangerously-skip-permissions` spent the whole line on a
flag. Cards now name the program only — its icon in the web client, its
bare name in the TUI — and keep the full command line in the tooltip.

Adds `maestro_protocol::display::command_program`, the Rust counterpart
of the web's `splitCommand`.

crates/maestro-protocol/src/display.rs

@@ -140,6 +140,63 @@ 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`.
+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(),
+    }
+}
+
+/// `FOO=bar`, the shell's own prefix for one command's environment.
+fn is_env_assignment(word: &str) -> bool {
+    let mut chars = word.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,
+    }
+}
+
+fn basename(word: &str) -> &str {
+    match word.rsplit_once('/') {
+        Some((_, tail)) => tail,
+        None => word,
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -318,4 +375,28 @@ mod tests {
         };
         assert_eq!(nested.name, "a/b");
     }
+
+    #[test]
+    fn command_program_drops_arguments() {
+        assert_eq!(
+            command_program("claude --dangerously-skip-permissions"),
+            "claude"
+        );
+        assert_eq!(command_program("  zsh   -l  "), "zsh");
+        assert_eq!(command_program("hx src/main.rs"), "hx");
+    }
+
+    #[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(""), "");
+    }
 }

crates/maestro-tui/src/sidebar.rs

@@ -8,7 +8,9 @@ use std::collections::{BTreeMap, HashSet};
 use std::path::PathBuf;
 
 use chrono::Utc;
-use maestro_protocol::display::{abbreviate_dir, abbreviate_folder_name, session_tree_path};
+use maestro_protocol::display::{
+    abbreviate_dir, abbreviate_folder_name, command_program, session_tree_path,
+};
 use maestro_protocol::{ActivityState, Session, SessionStatus, StatKind};
 use ratatui::layout::Rect;
 use ratatui::style::{Color, Modifier, Style};
@@ -297,7 +299,8 @@ impl Sidebar {
         if dead {
             tail.push(Span::styled(" exited", muted));
         }
-        let command = Span::styled(format!(" {}", s.command), muted);
+        // docs/SIDEBAR.md: the card names the program, never its arguments.
+        let command = Span::styled(format!(" {}", command_program(&s.command)), muted);
 
         // Reserve the triggered status fragments before detail and command.
         // If the row is exceptionally narrow, keep one column for the
@@ -874,12 +877,34 @@ mod tests {
         );
     }
 
+    /// docs/SIDEBAR.md: line 2 names the program, never its arguments.
+    #[test]
+    fn meta_line_drops_the_commands_arguments() {
+        let mut s = session_named(1, "handle");
+        s.command = "claude --dangerously-skip-permissions".into();
+        let sb = Sidebar {
+            sessions: vec![s],
+            highlight: None,
+            attached: Default::default(),
+        };
+        let all = rows(&draw(&sb, 60, 6));
+        let meta = content(&all[3]);
+        assert!(
+            meta.contains("claude"),
+            "line 2 must name the program: {meta:?}"
+        );
+        assert!(
+            !meta.contains("dangerously"),
+            "line 2 must not carry arguments: {meta:?}"
+        );
+    }
+
     /// The sidebar is narrow: the command truncates with `…` and never wraps
     /// onto a third row (docs/SIDEBAR.md).
     #[test]
     fn meta_line_command_truncates_instead_of_wrapping() {
         let mut s = session_named(1, "claude");
-        s.command = "a command that cannot fit".into();
+        s.command = "a-program-name-that-cannot-fit".into();
         s.activity_since = Utc::now() - Duration::seconds(5);
         s.blocked_work = Some(InTheWay {
             uncommitted_files: 120,
@@ -1099,7 +1124,7 @@ mod tests {
     #[test]
     fn blocked_warning_survives_before_a_truncated_command() {
         let mut s = session_named(1, "name");
-        s.command = "a command that cannot fit".into();
+        s.command = "a-program-name-that-cannot-fit".into();
         s.blocked_work = Some(InTheWay {
             uncommitted_files: 1,
             ..Default::default()

docs/SIDEBAR.md

@@ -88,21 +88,26 @@ of `maestro_protocol::InTheWay`'s `Display` does not disappear: it is the web
 card's tooltip and the wording of the kill refusal, so no two clients describe
 the same tree differently.
 
-`<command>` is unconditional and muted: the session's command line, shown on
+`<command>` is unconditional and muted: it names the **program** the session
-every card in both clients — no omission in the TUI, no name-vs-command
+runs — never its arguments. `claude --dangerously-skip-permissions` renders as
-comparison gating it. A session named by its command line then shows the same
+`claude`. Flags say how a session was invoked, which is not what a card is for,
-string on both lines; that is accepted, the price of a row that never changes
+and a long one crowds out every other fragment on the line. It shows on every
-height.
+card in both clients — no omission in the TUI, no name-vs-command comparison
+gating it. A session named by its program then shows the same string on both
+lines; that is accepted, the price of a row that never changes height.
 
-In the **web client** the command's leading program is replaced by that tool's
+The program is found by looking through a path, leading `FOO=bar` assignments
-icon when it is one we have a mark for — Claude Code, Codex, opencode, Gemini
+and wrappers (`sudo`, `env`, `npx`, `pnpm dlx`, …), then taking the basename:
-CLI, Aider, Cursor, pi, and any shell — and only the remaining words of the
+`/usr/local/bin/claude -p hi` is `claude`. A line that is nothing but wrappers
-command line follow as text. Recognition looks through a path, leading
+is shown as written rather than as an empty fragment.
-`FOO=bar` assignments and wrappers (`sudo`, `env`, `npx`, `pnpm dlx`, …); an
+
-unrecognised program keeps its full text, so the card never shows a mark
+In the **web client** the program is replaced by that tool's icon when it is
-standing for the wrong tool. The full command line stays in the card's tooltip
+one we have a mark for — Claude Code, Codex, opencode, Gemini CLI, Aider,
-either way. The **TUI** keeps the command as text: a terminal cannot be assumed
+Cursor, pi, and any shell — and nothing follows it as text. An unrecognised
-to have a font carrying tool glyphs.
+program keeps its name as text, so the card never shows a mark standing for the
+wrong tool. The full command line, arguments and all, stays in the card's
+tooltip either way. The **TUI** keeps the program as text: a terminal cannot be
+assumed to have a font carrying tool glyphs.
 
 ## Colour per activity state
 

web/src/attach.ts

@@ -56,12 +56,13 @@ export interface AttachInfo {
   command: string;
 }
 
-/** Header echoes the sidebar: the command's leading program becomes its tool
+/** Header echoes the sidebar: the program becomes its tool icon when we have a
- * icon when we have a mark for it, remaining words stay as text. */
+ * mark for it and stays as its bare name when we do not. Arguments are
+ * dropped, as on the card. */
 function commandFragment(command: string): string {
-  const { tool, rest } = splitCommand(command);
+  const { tool, program } = splitCommand(command);
   const icon = tool ? toolIconSvg(tool) : null;
-  const text = icon ? rest : command;
+  const text = icon ? "" : program;
   return `<span class="at-cmd">${icon ?? ""}${text ? escapeHtml(text) : ""}</span>`;
 }
 

web/src/catalog.test.ts

@@ -209,15 +209,16 @@ describe("session cards (#107)", () => {
     expect(cmd?.querySelector(".leaf-cmd-rest")).toBeNull();
   });
 
-  it("keeps the command's arguments as text beside the icon", () => {
+  it("drops the command's arguments, keeping them in the tooltip", () => {
     const s = session({
       id: "aaaaaaaa-0000-0000-0000-00000000001c",
-      command: "claude --resume",
+      command: "claude --dangerously-skip-permissions",
     });
     const el = renderSidebar(storeWith([s])).el;
     const cmd = rowFor(el, s.id)?.querySelector<HTMLElement>(".card-line2 .leaf-cmd");
     expect(cmd?.querySelector(".tool-icon")?.getAttribute("data-tool")).toBe("claude");
-    expect(cmd?.querySelector(".leaf-cmd-rest")?.textContent).toBe("--resume");
+    expect(cmd?.querySelector(".leaf-cmd-rest")).toBeNull();
+    expect(cmd?.getAttribute("title")).toBe("claude --dangerously-skip-permissions");
   });
 
   it("keeps an unknown command as plain text", () => {
@@ -228,7 +229,8 @@ describe("session cards (#107)", () => {
     const el = renderSidebar(storeWith([s])).el;
     const cmd = rowFor(el, s.id)?.querySelector<HTMLElement>(".card-line2 .leaf-cmd");
     expect(cmd?.querySelector(".tool-icon")).toBeNull();
-    expect(cmd?.querySelector(".leaf-cmd-rest")?.textContent).toBe("hx src/main.rs");
+    expect(cmd?.querySelector(".leaf-cmd-rest")?.textContent).toBe("hx");
+    expect(cmd?.getAttribute("title")).toBe("hx src/main.rs");
   });
 
   it("maps each activity state to its contract slug", () => {

web/src/catalog.ts

@@ -96,13 +96,14 @@ function blockedFragment(blockers: InTheWay): string {
   return `<span class="card-flag leaf-blocked" title="${escapeHtml(title)}">${stats}</span>`;
 }
 
-/** docs/SIDEBAR.md: the command's leading program becomes its tool icon when
+/** docs/SIDEBAR.md: the card names the program only — arguments never reach
- * we have a mark for it, and only the remaining words stay as text. The full
+ * the card. The program becomes its tool icon when we have a mark for it, and
- * command line stays in the tooltip either way. */
+ * stays as its bare name when we do not. The full command line, arguments and
+ * all, stays in the tooltip either way. */
 function commandFragment(command: string): string {
-  const { tool, rest } = splitCommand(command);
+  const { tool, program } = splitCommand(command);
   const icon = tool ? toolIconSvg(tool) : null;
-  const text = icon ? rest : command;
+  const text = icon ? "" : program;
   return `<span class="card-flag leaf-cmd" title="${escapeHtml(command)}">${icon ?? ""}${text ? `<span class="leaf-cmd-rest">${escapeHtml(text)}</span>` : ""}</span>`;
 }
 

web/src/toolIcon.test.ts

@@ -20,12 +20,12 @@ describe("tool icons on the command fragment (docs/SIDEBAR.md)", () => {
     }
   });
 
-  it("keeps everything after the program as text", () => {
+  it("drops everything after the program", () => {
-    expect(splitCommand("claude --resume -p hi")).toEqual({
+    expect(splitCommand("claude --dangerously-skip-permissions")).toEqual({
       tool: "claude",
-      rest: "--resume -p hi",
+      program: "claude",
     });
-    expect(splitCommand("  zsh   -l  ")).toEqual({ tool: "shell", rest: "-l" });
+    expect(splitCommand("  zsh   -l  ")).toEqual({ tool: "shell", program: "zsh" });
   });
 
   it("looks through paths, env assignments and wrappers", () => {
@@ -33,13 +33,13 @@ describe("tool icons on the command fragment (docs/SIDEBAR.md)", () => {
     expect(splitCommand("FOO=1 BAR=2 claude").tool).toBe("claude");
     expect(splitCommand("npx opencode").tool).toBe("opencode");
     expect(splitCommand("pnpm dlx opencode run").tool).toBe("opencode");
-    expect(splitCommand("pnpm dlx opencode run").rest).toBe("run");
+    expect(splitCommand("pnpm dlx opencode run").program).toBe("opencode");
   });
 
-  it("leaves an unrecognised program as text, mark-less", () => {
+  it("leaves an unrecognised program as its bare name, mark-less", () => {
     expect(splitCommand("hx src/main.rs")).toEqual({
       tool: null,
-      rest: "hx src/main.rs",
+      program: "hx",
     });
     // A wrapper with nothing after it is not a tool either.
     expect(splitCommand("sudo").tool).toBeNull();

web/src/toolIcon.ts

@@ -2,11 +2,11 @@
  *
  * A session's command line starts with the program that runs it, and that
  * program is nearly always one of a handful of agents or a shell. Rendering it
- * as its own mark buys back most of the fragment's width, which the sidebar
+ * as its own mark buys back the whole fragment's width — the arguments are
- * spends on the rest of the command line instead.
+ * dropped, so a card says which tool runs, not how it was invoked.
  *
- * Recognition is deliberately narrow: an unrecognised program keeps its text,
+ * Recognition is deliberately narrow: an unrecognised program keeps its name
- * so the fragment never renders a mark that stands for the wrong tool.
+ * as text, so the fragment never renders a mark that stands for the wrong tool.
  */
 
 /** Command wrappers that run another program: the tool is what follows. */
@@ -48,15 +48,15 @@ export const TOOL_LABELS: Record<string, string> = {
 export interface CommandParts {
   /** Icon id, or `null` when the program is not one we have a mark for. */
   tool: string | null;
-  /** What is left of the command line once the icon stands for the program.
+  /** The program the command runs, basenamed and stripped of its arguments —
-   * Empty when the icon says everything the command line said. */
+   * what a card shows when there is no icon to show instead. */
-  rest: string;
+  program: string;
 }
 
-/** Split a command line into the tool its icon stands for and the remainder.
+/** Split a command line into the tool its icon stands for and the program name.
  *
- * `claude --resume` → `{tool: "claude", rest: "--resume"}`; an unrecognised
+ * `claude --resume` → `{tool: "claude", program: "claude"}`; an unrecognised
- * `hx src/` keeps the whole line as `rest` with no tool. */
+ * `hx src/` keeps `hx` as the program with no tool. */
 export function splitCommand(command: string): CommandParts {
   const words = command.trim().split(/\s+/).filter(Boolean);
   let i = 0;
@@ -68,23 +68,22 @@ export function splitCommand(command: string): CommandParts {
       i += 1;
       continue;
     }
-    const program = basename(word);
+    const wrapper = basename(word).toLowerCase();
-    if (WRAPPERS.has(program)) {
+    if (WRAPPERS.has(wrapper)) {
       i += 1;
-      if ((program === "pnpm" || program === "yarn") && words[i] === "dlx") i += 1;
+      if ((wrapper === "pnpm" || wrapper === "yarn") && words[i] === "dlx") i += 1;
       continue;
     }
     break;
   }
-  if (i >= words.length) return { tool: null, rest: command.trim() };
+  if (i >= words.length) return { tool: null, program: command.trim() };
-  const tool = BY_PROGRAM[basename(words[i])] ?? null;
+  const program = basename(words[i]);
-  if (!tool) return { tool: null, rest: command.trim() };
+  return { tool: BY_PROGRAM[program.toLowerCase()] ?? null, program };
-  return { tool, rest: words.slice(i + 1).join(" ") };
 }
 
 function basename(word: string): string {
   const cut = word.lastIndexOf("/");
-  return (cut >= 0 ? word.slice(cut + 1) : word).toLowerCase();
+  return cut >= 0 ? word.slice(cut + 1) : word;
 }
 
 /** Anthropic's burst: tapered rays around a centre, long ones on the axes. */