Add Gemini run mode (third external-CLI mode alongside Codex/OpenCode)#134
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Jun 24, 2026
Gemini (PR #134) blockers: - runGemini() now unwraps the {success,data} envelope: status check reads .data.available, quick-start reads data.data.sessionId (was reading the raw shape, so the Run-Gemini button could never start a session). - setGeminiEnvVars() now uses the socket-scoped ${this.tmux()} setenv instead of bare tmux — Gemini/Google auth env vars were targeting the wrong tmux server and silently failing on every install. Gemini parity polish: - gemini tab-mode badge ('gm') + .tab-mode.gemini CSS; kill-dialog label 'Kill Tmux & Gemini'; codeman doctor dependency-registry entry; export isGeminiAvailable from utils barrel; COLORTERM=truecolor + unset NO_COLOR; add gemini to isAltScreenStripMode (Ink TUI, repaints inline like Codex/Claude). - Revert 4 system-routes.test.ts envelope assertions weakened to (body.message ?? body.error) back to (body.success === false). - Add a runGemini() vm-sandbox test that drives the envelope path end-to-end. Ralph todo-config (PR #135): maxTodos/todoExpirationMinutes are now persisted and read back — surfaced via the loopState getter (RalphTrackerState) into toState()/SSE broadcast and restored in restoreState(), mirroring maxIterations. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Summary
Adds Gemini as a third external-CLI run mode, alongside the existing Codex and OpenCode modes. This follows the same shape as those modes: a CLI resolver, run-mode wiring through the session/tmux layers, and the welcome/run-mode UI.
src/utils/gemini-cli-resolver.tsresolves the Gemini CLI directory, matching the codex/opencode resolver pattern.geminiis added toSessionModeand woven through the shared run-mode handling (session, tmux-manager, mux-interface, schemas, server, and the session/system/ralph/respawn routes) next to the existing codex/opencode branches, including aGET /api/gemini/statusendpoint and the external-CLI alt-screen handling.Note for reviewers
Gemini gets a welcome-screen button (matching Claude and OpenCode). Codex remains dropdown-only, which is the existing behavior on master; this PR does not change that. If you would prefer Gemini to also be dropdown-only for symmetry with Codex, that is a small follow-up.
Files
New:
src/utils/gemini-cli-resolver.ts,test/gemini-mode.test.ts.Wiring:
src/session.ts,src/tmux-manager.ts,src/mux-interface.ts,src/types/session.ts,src/config/dependency-registry.ts,src/utils/index.ts,src/web/schemas.ts,src/web/server.ts,src/web/routes/{session,system}-routes.ts.Frontend:
src/web/public/{session-ui.js,index.html,styles.css,mobile.css}.Tests updated:
test/routes/system-routes.test.ts,test/run-mode-ui.test.ts.Testing
tsc --noEmit: cleantest/run-mode-ui.test.ts: 4/4test/routes/system-routes.test.ts: 65/65test/gemini-mode.test.ts: 3/3npm run build: passes