# Work Log: codex/issue-188-lock-auto-recovery

## Header

- Branch: `codex/issue-188-lock-auto-recovery`
- Classification: `feature`
- Classified by: `Codex`
- Frozen: `2026-06-08`
- Created Date: `2026-06-08`
- Owner: `codex`
- Guardrails Mode: `Full`
- Current Phase: `ship`
- Checkpoint SHA: `99dfed91b82a65c4e1ca3afb2c1645f7654c8877`
- Recommended Skills: `test-driven-development, karpathy-principles, verification-before-completion, red-team-adversarial`
- Primary Domain Snapshot: `governance`
- SSoT Sequence: `37`

---

## Session Info

- Agent: `Codex`
- Session: `2026-06-08 12:00 UTC`
- Platform: `codex`
- Files Read: `18`
- Guardrails loaded: `§1, §2, §4, §7, §8.1, §10 (core) + §5, §12 (implement)`
- Override: none

---

## Task Description

Handle GitHub issue #188 by adding bootstrap-time auto-recovery for stale, dead-PID, or corrupted advisory Work Log lock files. Full chain: `/spec → /plan → /implement → /review → /test → /handoff → /ship`.

---

## Phase Sequence

| Phase | Status | Entered | Notes |
|---|---|---|---|
| bootstrap | completed | 2026-06-08 | Classified as feature; helper + workflow + tests. |
| spec | completed | 2026-06-08 | `docs/specs/worklog-lock-auto-recovery.md` frozen. |
| plan | completed | 2026-06-08 | Target helper, bootstrap wiring, focused guard tests. |
| implement | completed | 2026-06-08 | Helper, bootstrap wiring, and focused tests implemented. |
| review | completed | 2026-06-08 | PASS after fixing Python 3.9 `datetime.UTC` compatibility issue. |
| test | completed | 2026-06-08 | Focused, adjacent guard, py_compile, and pre-ship validator run. |
| handoff | completed | 2026-06-08 | Resume block written; doc/code/worklog paths recorded. |
| ship | completed | 2026-06-08 | Spec shipped, SSoT/archive updated, final validator fail=0. |

---

## Phase Summary

- bootstrap: selected issue #188 after #199 merged; classification feature; Codex author pattern will be used for commits. ⚡ ACX
- spec: added frozen spec `docs/specs/worklog-lock-auto-recovery.md` with AC-1..AC-6. ⚡ ACX
- plan: Target Files: `.agentcortex/tools/recover_worklog_lock.py`, `tests/guard/test_worklog_lock_recovery.py`, `.agent/workflows/bootstrap.md`, `docs/specs/worklog-lock-auto-recovery.md`. Steps: TDD red tests → helper implementation → bootstrap wiring → review/test/ship evidence. Risk+Rollback: keep advisory semantics; revert PR if recovery behavior is wrong. AC Coverage: AC-1..AC-6. Mode: TDD + small scoped feature. ⚡ ACX
- implement: Files changed: `.agentcortex/tools/recover_worklog_lock.py`, `tests/guard/test_worklog_lock_recovery.py`, `.agent/workflows/bootstrap.md`. Tests: red `ModuleNotFoundError`, then 6/6 focused + 30/30 related guard tests pass. Checkpoint SHA: `99dfed91b82a65c4e1ca3afb2c1645f7654c8877`. ⚡ ACX
- review: Verdict PASS. Fixed finding: Python 3.9 CI cannot import `datetime.UTC`; helper/tests now use `timezone.utc`. Red-team: no critical/high attack path; stdlib-only, no new external dependency or auth boundary. ⚡ ACX
- test: PASS for focused and adjacent unit suites plus py_compile. Pre-ship validator has one expected fail: new spec not yet indexed in SSoT until /ship. Adversarial cases covered: corrupt JSON, dead PID, active live lock. ⚡ ACX
- handoff: Doc path `docs/specs/worklog-lock-auto-recovery.md`; code path `.agentcortex/tools/recover_worklog_lock.py`; Work Log path `.agentcortex/context/work/codex-issue-188-lock-auto-recovery.md`; next legal phase `/ship`. ⚡ ACX
- ship: Spec marked shipped; SSoT Spec Index/Ship History and archive INDEX entry updated; final validator `pass=101 warn=7 fail=0 skip=2`. ⚡ ACX

---

## Gate Evidence

- Gate: bootstrap | Verdict: PASS | Classification: feature | Timestamp: 2026-06-08T12:00:00Z
- Gate: plan | Verdict: PASS | Classification: feature | Timestamp: 2026-06-08T12:10:00Z
- Gate: implement | Verdict: PASS | Classification: feature | Timestamp: 2026-06-08T12:25:00Z
- Gate: review | Verdict: PASS | Classification: feature | Timestamp: 2026-06-08T12:35:00Z
- Gate: test | Verdict: PASS | Classification: feature | Timestamp: 2026-06-08T12:45:00Z
- Gate: handoff | Verdict: PASS | Classification: feature | Timestamp: 2026-06-08T12:50:00Z
- Gate: ship | Verdict: PASS | Classification: feature | Timestamp: 2026-06-08T12:55:00Z

---

## External References

| Type | Path / URL | Notes |
|---|---|---|
| Spec | `docs/specs/worklog-lock-auto-recovery.md` | Frozen feature contract. |
| Issue | `https://github.com/KbWen/agentic-os/issues/188` | Source request. |
| Docs | `https://docs.python.org/3.11/library/os.html` | Checked process signal/liveness context; implementation reuses existing project helper. |

---

## Known Risk

- Risk: accidentally treating advisory locks as hard locks; mitigation: helper returns distinct active-lock status and bootstrap remains advisory.
- Risk: stale lock recovery could hide concurrent work; mitigation: recovery writes a Drift Log line with prior holder details.
- Rollback plan: revert PR; no migration or persistent data format change beyond advisory helper/tooling.

---

## Conflict Resolution

- karpathy-principles vs verification-before-completion: compatible; use Karpathy for scope/simplicity discipline and verification-before-completion for evidence gates.

---

## Skill Notes

- Applying test-driven-development strategy.
  - Checklist: write red tests for lock states before helper implementation.
  - Checklist: keep each behavior small: missing, stale, dead PID, corrupted, active.
  - Constraint: no production helper behavior without focused regression coverage.
- Applying karpathy-principles strategy.
  - Checklist: choose the smallest helper + workflow wiring that solves #188.
  - Checklist: avoid changing hard-lock or validator semantics unless required by tests.
  - Constraint: every changed line must trace to #188.
- Applying verification-before-completion strategy.
  - Checklist: scope, quality, evidence, risk, communication gates before completion.
  - Checklist: record reproducible test and validator evidence.
  - Constraint: no pass claim without command output.

---

## Drift Log

- Review: fixed Python 3.9 compatibility issue introduced by `datetime.UTC`; CI includes a Python 3.9 validate job.
- ADR Coverage Check: `python .agentcortex/tools/check_adr_coverage.py --paths ...` -> covered by `ADR-004-override-layer-activation.md` for `.agent/workflows/bootstrap.md`.
- Recovered stale Work Log lock on 2026-06-08T04:11:29.766254+00:00; prior_owner=codex; prior_session=2026-06-08T12:20:00Z; reason=dead-pid; lock=codex-issue-188-lock-auto-recovery.lock.json

---

## Design Reference

none

---

## Observability

none

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## Test Gate Results

- Focused: `python -m unittest tests.guard.test_worklog_lock_recovery -v` -> PASS, 6 tests OK.
- Adjacent: `python -m unittest tests.guard.test_d2_1_guard_unit tests.guard.test_worklog_lock_recovery -v` -> PASS, 30 tests OK.
- Syntax: `python -m py_compile .agentcortex/tools/recover_worklog_lock.py tests/guard/test_worklog_lock_recovery.py` -> PASS.
- Validator: `powershell -ExecutionPolicy Bypass -File .agentcortex/bin/validate.ps1` -> expected pre-ship FAIL only for SSoT Spec Index missing `docs/specs/worklog-lock-auto-recovery.md`.

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## Adversarial Test Cases

| # | Category | Scenario | Expected Behavior | Evidence |
|---|---|---|---|---|
| 1 | Boundary | Corrupted lock JSON | Recover and write one Drift Log record | `test_corrupted_lock_recovered` |
| 2 | Boundary | Dead PID in recent lock | Recover because holder process is gone | `test_dead_pid_recovered` |
| 3 | Concurrent session | Live PID, other owner/session, non-stale | Preserve lock and exit 2 | `test_active_lock_preserved_by_api_and_cli` |

---

## Resume

### Read Map
- Spec: `docs/specs/worklog-lock-auto-recovery.md`
- Helper: `.agentcortex/tools/recover_worklog_lock.py`
- Tests: `tests/guard/test_worklog_lock_recovery.py`
- Workflow wiring: `.agent/workflows/bootstrap.md §2a`

### Skip List
- Do not re-read shipped specs or archived logs; all #188 evidence is in this Work Log.
- Do not stage `.acx-local/`; it is unrelated local state.

### Context Snapshot
- Branch: `codex/issue-188-lock-auto-recovery`
- Next phase: `/ship`
- Required ship work: mark spec shipped, update SSoT Spec Index/Ship History, archive this Work Log, run validator, commit as Codex, push, open PR.

---

## Security Findings

none

---

## Red Team Findings

- 2026-06-08 /review: 0 findings. No new network endpoint, external dependency, auth boundary, or secret-handling surface; active-lock preservation returns exit 2 instead of overwriting another live session.

---

## Evidence

- `gh issue view 188 --json ...` -> issue open; asks for PID/timestamp stale lock recovery during bootstrap.
- `rg "lock.json|pid_alive|stale advisory"` -> existing hard-lock liveness helper and validator stale-lock warnings found.
- `python -m unittest tests.guard.test_worklog_lock_recovery -v` before helper -> FAIL: `ModuleNotFoundError: No module named 'recover_worklog_lock'`.
- `python -m unittest tests.guard.test_worklog_lock_recovery -v` after helper -> PASS: 6 tests OK.
- `python -m unittest tests.guard.test_d2_1_guard_unit tests.guard.test_worklog_lock_recovery -v` -> PASS: 30 tests OK.
- `python .agentcortex/tools/recover_worklog_lock.py ensure --lock .agentcortex/context/work/codex-issue-188-lock-auto-recovery.lock.json ... --phase implement` -> `status=created`, `exit_code=0`.
- `rg "from datetime import UTC|python-version" ...` -> CI has Python 3.9; reviewed and replaced `datetime.UTC` with `timezone.utc`.
- `python -m py_compile .agentcortex/tools/recover_worklog_lock.py tests/guard/test_worklog_lock_recovery.py` -> PASS.
- `powershell -ExecutionPolicy Bypass -File .agentcortex/bin/validate.ps1` after EOL repair -> expected pre-ship FAIL only: SSoT Spec Index missing `docs/specs/worklog-lock-auto-recovery.md`.
- `python .agentcortex/tools/check_adr_coverage.py --paths ...` -> PASS: `covered_by:ADR-004-override-layer-activation.md`.
- `powershell -ExecutionPolicy Bypass -File .agentcortex/bin/validate.ps1` after SSoT guarded write -> PASS: `pass=101 warn=7 fail=0 skip=2`.
- `python -m unittest tests.guard.test_worklog_lock_recovery -v` final -> PASS: 6 tests OK.
