- Breaker reset is now explicit-only: POST /api/sessions/:id/interactive no
longer unconditionally resets the PTY-exit breaker (that endpoint IS the
frontend's automatic re-attach path, so the breaker could never trip on the
COD-115 crash loop and any tab click silently re-armed it). The route accepts
a schema-validated optional body flag {clearBreaker:true}
(InteractiveStartSchema) and resets only when it is sent.
- Frontend restart control: app.js selectSession keeps the bare auto-attach
(no body, never clears); when the selected session has respawnBlocked it asks
for explicit user confirmation and only then re-POSTs with clearBreaker:true.
respawnBlocked is surfaced via SessionState/toState() (runtime-only, not
restored on boot so recovery can re-attach).
- Trip observability: WebServer.setupSessionListeners() is now idempotent
(skips while refs are attached) and the re-attach routes (/interactive,
/interactive-respawn, /shell) re-run it, restoring the wiring that the exit
handler detaches on every PTY exit — without this the 5th-exit trip had
guaranteed zero listeners (no SSE, no push, no persist, no run-summary).
- Push notification: added SessionRespawnBreakerTripped to PUSH_EVENT_MAP
('Session crash loop stopped', urgency critical) with an exit-count body
branch; previously sendPushNotifications silently no-oped.
- Minor: buildMuxAttachEnv() truecolor param is now actually passed
(codex/gemini, mirrors buildEnvExports); buildClaudeEnv() uses delete for
COLORTERM/CLAUDECODE (same node-pty "KEY=undefined" quirk as COD-115).
- Tests: route tests assert auto-reattach does NOT reset, clearBreaker resets,
invalid flag rejected, and listener re-wiring on /interactive + /shell;
real-wiring lifecycle tests (createSessionListeners/attach/detach) prove the
exit-detach gap and that re-setup keeps the 5th-exit trip observable;
PUSH_EVENT_MAP regression guard.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Defense-in-depth after COD-115. If the interactive PTY exits non-zero
repeatedly within a short window, recovery/reconnect paths recreate it
indefinitely (COD-115 saw 114 'exited with code: 1' events + orphans).
- New pure InteractivePtyExitBreaker (session-pty-exit-breaker.ts):
injectable time, sliding window, clean-exit resets counter, stays
tripped until reset(). Defaults: threshold 5, window 10s.
- Session records each interactive PTY exit in the breaker; on trip it
flips _status to 'error', sets _respawnBlocked, emits
respawnBreakerTripped. startInteractive() refuses to respawn while
blocked, so all recovery/reconnect callers stop looping uniformly.
- Explicit user restart (POST /api/sessions/:id/interactive) calls
resetRespawnBreaker() so intentional restarts are never blocked.
- New SSE event session:respawnBreakerTripped wired in sse-events.ts +
constants.js (registries in sync) + session-listener-wiring.ts;
minimal diagnostic toast in app.js.
- Tests: test/respawn-pty-breaker.test.ts (pure trip/reset/window +
MockSession session-level trip/reset).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Codeman maintainer