Closes NAP-216. Thin client for the registry HTTP API + per-session
daemon WebSocket. Becomes the headless test harness for NAP-217 and
unblocks the demo-by-script path before the web client lands (NAP-218).
Crate layout (`crates/maestro-cli/`):
- `cli.rs` — clap-derive parser. Commands: `list`, `spawn`, `attach`,
`kill`, `set-registry`. Global `--registry-url` (env
`MAESTRO_REGISTRY_URL`), `--config`, repeatable `-v`.
- `config.rs` — `CliConfig` persisted at `~/.config/maestro/cli.toml`,
storing the default registry URL + the session cookie issued by the
registry's cookie middleware.
- `http.rs` — `RegistryClient` wrapping `reqwest`. Attaches the
persisted cookie, captures `Set-Cookie` responses (first-contact
bootstrap and rotation), atomically writes the new value back to
the config file.
- `sessions.rs` — `list/spawn/kill` + connect-info fetch. `list` prints
a per-daemon grouped table; `--json` for scripting.
- `attach.rs` — raw-TTY WS proxy. Termios cfmakeraw with an RAII guard
for restore-on-drop, SIGWINCH → `ClientControl::Resize` text frame,
configurable detach key (default Ctrl-q; accepts `^X` form), echoes
`Ping`/`Pong` for keepalive symmetry with the daemon side.
Workspace deps added: clap (derive+env), reqwest (rustls+cookies),
nix (term+signal).
Smoke-tested against the live registry at maestro-registry.n62.casa:
`maestro list` issued + persisted the cookie and printed the empty
catalog cleanly. 19 new unit tests (parser, config round-trip,
table-printing, cookie extraction, attach URL/detach-key parsing).
Full workspace `cargo test`: 97 passed.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
