feat(agent-input): !-prefix bash command mode#1414
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Type a message starting with `!` to run it as a one-off shell command in the session's working directory instead of sending it to the agent — mirrors the Claude Code CLI's `!` bash mode. Per-message only, no persistent toggle. The command runs via the session-scoped `bash` RPC (the same handler that powers directory autocomplete), so it executes in and is sandboxed to the session cwd. The echoed command and its output are injected as local-only messages (no server round-trip), rendering the output in a fenced code block. Gated behind a new `expBashMode` experiment flag (off by default), with a toggle under Settings -> Features -> Experiments. Generated with [Claude Code](https://claude.ai/code) via [Happy](https://happy.engineering) Co-Authored-By: Claude <noreply@anthropic.com> Co-Authored-By: Happy <yesreply@happy.engineering>
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Adds a
!-prefix bash command mode to the chat input, mirroring the Claude Code CLI: a message that starts with!runs as a one-off shell command in the session's working directory instead of being sent to the agent, and its output renders inline. It's per-message only — there's no persistent mode toggle. The command runs over the existing session-scopedbashRPC (the same handler that powers directory autocomplete and Windowscmdsupport), so it executes in and is sandboxed to the session cwd; the echoed command and its output are injected as local-only messages (no server round-trip, the agent is never involved), with output shown in a fenced code block. It's gated behind a newexpBashModeexperiment flag (off by default — Settings → Features → Experiments), so default behaviour is unchanged.Proof
Captured locally via a standalone
happy-server(PGlite) + Expo web + a pairedhappy-clidaemon, authenticated through thegetDevWebQueryCredentials()dev URL bypass and driven headlessly with Playwright (live e2e — real daemon, real session). With the flag on, typing!pwdand!echo BASHMODE_OK_4242runs each as a shell command and renders the output in ashcode block; the agent is never invoked.Verification:
tsc --noEmitclean, settings unit tests pass (settings.spec.ts, 34/34), and the new strings are added to all 10 locale files. No new message kind and no reducer changes — the output reuses the existing agent-text markdown rendering.Related: addresses #568 (run shell commands from mobile without burning tokens). #597 proposes the same capability with a
$prefix; this uses!to mirror the Claude Code CLI's bash mode.