Two issues fixed:
1. process-cleanup.ts used fire-and-forget void Promise for shutdown
handlers — now properly collects and awaits all cleanup promises
via Promise.allSettled, with dedup guard to prevent double cleanup
2. TmuxSessionManager was never registered for process cleanup —
now registered in create-managers.ts via registerManagerForCleanup
Also fixed setTimeout().unref() which could let the process exit
before cleanup completes.
- Revert getMessageDir to original join(MESSAGE_STORAGE, sessionID) behavior
- Fix dead subagentSessions.delete by capturing previousSessionID before tryFallbackRetry
- Add .unref() to process cleanup setTimeout to prevent 6s hang on Ctrl-C
- Add missing isUnstableAgent to fallback retry input mapping
- Fix process-cleanup tests to use exit listener instead of SIGINT at index 0
- Swap test filenames in compaction-aware-message-resolver to exercise skip logic correctly
YeonGyu-Kim