homelab/.planning/phases/03-lifecycle-management/03-02-SUMMARY.md

phase	plan	subsystem	tags	requires	provides	affects	tech-stack	key-files	key-decisions	patterns-established	duration	completed
03-lifecycle-management	02	bot-lifecycle	asyncio telegram subprocess-management idle-timeout graceful-shutdown	phase provides 03-01 SessionIdleTimer class with reset/cancel and PID tracking in ClaudeSubprocess	Automatic session suspension after idle timeout Transparent session resume with history preservation Race-free suspend/resume via asyncio.Lock per session Orphaned subprocess cleanup at bot startup Graceful shutdown with subprocess termination /timeout command for per-session idle configuration /sessions command for session status overview	03-03-output-modes	added patterns Race prevention via per-session asyncio.Lock for concurrent suspend/resume Silent suspension (no Telegram notification) per CONTEXT.md decision Resume detection via .claude/ directory existence check Idle timer reset in on_complete callback (timer only counts after Claude finishes)	created modified telegram/bot.py	Silent suspension (no Telegram notification) per CONTEXT.md LOCKED decision Race prevention via subprocess_locks dict: one asyncio.Lock per session Resume shows idle duration if >1 min (e.g., 'Resuming session (idle for 15 min)...') Orphaned PID verification via /proc/cmdline check (only kill claude processes) Bot shutdown uses post_shutdown callback (python-telegram-bot handles signals)	Per-session locking: subprocess_locks.setdefault(session_name, asyncio.Lock()) Idle timer lifecycle: create on session spawn, reset in on_complete, cancel on archive Resume status message format: 'Resuming session (idle for Xm)...'	4min	2026-02-04

Phase 3 Plan 2: Suspend/Resume Implementation Summary

Automatic session suspension after 10min idle, transparent resume with full history, race-free with asyncio.Lock per session

Performance

• Duration: 4 min
• Started: 2026-02-04T23:33:30Z
• Completed: 2026-02-04T23:37:56Z
• Tasks: 2
• Files modified: 1

Accomplishments

• Sessions automatically suspend after idle timeout (subprocess terminated, metadata updated, silent)
• User messages to suspended sessions transparently resume with full history
• Race condition between timeout-fire and user-message prevented via asyncio.Lock per session
• Bot startup kills orphaned subprocess PIDs (verified via /proc/cmdline)
• Bot shutdown terminates all subprocesses gracefully (SIGTERM + timeout + SIGKILL)
• /timeout command sets per-session idle timeout (1-120 min range)
• /sessions command lists all sessions with LIVE/IDLE status, persona, and relative last-active time

Task Commits

Each task was committed atomically:

1. Task 1: Suspend/resume wiring with race locks, startup cleanup, and graceful shutdown - 6ebdb4a (feat)

   • suspend_session() callback for idle timer
   • get_subprocess_lock() helper to prevent races
   • Resume logic in handle_message/handle_photo/handle_document
   • Idle timer reset in on_complete and on user activity
   • cleanup_orphaned_subprocesses() with /proc/cmdline verification
   • post_init() and post_shutdown() lifecycle callbacks
   • Updated new_session, switch_session_cmd, archive_session_cmd, model_cmd

2. Task 2: /timeout and /sessions commands - 06c5246 (feat)

   • timeout_cmd() to set/show per-session idle timeout
   • sessions_cmd() to list all sessions with status
   • Registered both commands in main()

Files Created/Modified

• telegram/bot.py - Added suspend/resume lifecycle, idle timers, race locks, startup cleanup, graceful shutdown, /timeout and /sessions commands

Decisions Made

From plan execution:

• Resume status message shows idle duration if >1 min: "Resuming session (idle for 15 min)..."
• Orphaned subprocess cleanup verifies PID is a claude process via /proc/cmdline before killing
• Bot shutdown uses post_shutdown callback (python-telegram-bot Application handles signal installation internally)

Already documented in STATE.md:

• Silent suspension (no Telegram notification) - from CONTEXT.md LOCKED decision
• Switching sessions leaves previous subprocess running (suspends on its own timer) - from CONTEXT.md LOCKED decision

Deviations from Plan

None - plan executed exactly as written.

Issues Encountered

None

Next Phase Readiness

Ready for Phase 3 Plan 3 (Output Modes):

• Session lifecycle fully implemented (suspend/resume, timeout configuration, status commands)
• Subprocess management robust (startup cleanup, graceful shutdown)
• Race conditions handled via per-session locks

No blockers or concerns

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Phase: 03-lifecycle-management Completed: 2026-02-04