* fix: reap stuck generators in reapStaleSessions (fixes#1652)
Sessions whose SDK subprocess hung would stay in the active sessions
map forever because `reapStaleSessions()` unconditionally skipped any
session with a non-null `generatorPromise`. The generator was blocked
on `for await (const msg of queryResult)` inside SDKAgent and could
never unblock itself — the idle-timeout only fires when the generator
is in `waitForMessage()`, and the orphan reaper skips processes whose
session is still in the map.
Add `MAX_GENERATOR_IDLE_MS` (5 min). When `reapStaleSessions()` sees
a session whose `generatorPromise` is set but `lastGeneratorActivity`
has not advanced in over 5 minutes, it now:
1. SIGKILLs the tracked subprocess to unblock the stuck `for await`
2. Calls `session.abortController.abort()` so the generator loop exits
3. Calls `deleteSession()` which waits up to 30 s for the generator to
finish, then cleans up supervisor-tracked children
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
* fix: freeze time in stale-generator test and import constants from production source
- Export MAX_GENERATOR_IDLE_MS, MAX_SESSION_IDLE_MS, StaleGeneratorCandidate,
StaleGeneratorProcess, and detectStaleGenerator from SessionManager.ts so
tests no longer duplicate production constants or detection logic.
- Use setSystemTime() from bun:test to freeze Date.now() in the
"exactly at threshold" test, eliminating the flaky double-Date.now() race.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
Ben Younes
05232ff091