# Work Log: codex/issue-192-pre-commit-hook

## Header

- Branch: `codex/issue-192-pre-commit-hook`
- Classification: `feature`
- Classified by: `Codex`
- Frozen: `2026-06-08`
- Created Date: `2026-06-08`
- Owner: `codex`
- Guardrails Mode: `Full`
- Current Phase: `ship`
- Checkpoint SHA: `def2fbf83ef73a066acfc85ef5ad6e146d9e9698`
- Recommended Skills: `verification-before-completion`
- Primary Domain Snapshot: `developer-experience`
- SSoT Sequence: `36`

---

## Session Info

- Agent: `Codex`
- Session: `2026-06-08 00:00 UTC`
- Platform: `codex`
- Files Read: `14`
- Guardrails loaded: `§1, §2, §4, §7, §8.1, §10 (core) + §5, §12 (implement)`

---

## Task Description

Handle GitHub issue #192 by turning the existing advisory `.githooks/pre-commit.guard-ssot.sample` into an opt-in local validation hook that runs Agentic OS validators before commit, documents setup, and adds focused regression coverage.

---

## Phase Sequence

| Phase | Status | Entered | Notes |
|---|---|---|---|
| bootstrap | completed | 2026-06-08 | Classified as feature: opt-in developer workflow change with new tests and docs. |
| spec | completed | 2026-06-08 | `docs/specs/pre-commit-local-validation.md` frozen. |
| plan | completed | 2026-06-08 | Target hook sample, README docs, focused CI test. |
| implement | completed | 2026-06-08 | Hook validator execution, README setup docs, focused tests. |
| review | completed | 2026-06-08 | AC burden-of-proof PASS; no blocking findings. |
| test | completed | 2026-06-08 | Focused hook suite plus syntax/whitespace checks. |
| handoff | completed | 2026-06-08 | Resume block written; ready for ship metadata/update. |
| ship | completed | 2026-06-08 | SSoT/spec/archive updates prepared. |

---

## Phase Summary

- bootstrap: selected GitHub issue #192 after triage; existing hook sample was advisory-only and did not run validators. Classification: feature. ⚡ ACX
- spec: added frozen spec `docs/specs/pre-commit-local-validation.md` with AC-1..AC-5. ⚡ ACX
- plan: target files `.githooks/pre-commit.guard-ssot.sample`, `README.md`, `tests/ci/test_pre_commit_hook.py`; keep activation opt-in and validator-backed. | Confidence: 94% — high
- implement: changed planned hook/docs/tests plus the required spec; focused hook tests passed; bash syntax passed; validator fail is limited to ship-time SSoT Spec Index update. | Confidence: 93% — high
- review: PASS — AC-1..AC-5 proven with code/test evidence; no security or red-team findings; fixed test temp-dir cleanup during review.
- test: 7 focused hook tests passed; AC-1..AC-5 covered; adversarial missing-validator case passed; bash syntax and diff whitespace checks passed.
- handoff: feature #192 handed off with spec/code/worklog refs; next action is ship metadata, final validators, commit/PR.
- ship: shipped issue #192; spec marked shipped; SSoT/archive/index updates prepared; final validators to run before commit.

---

## Gate Evidence

- Gate: plan | Verdict: PASS | Classification: feature | Timestamp: 2026-06-08T00:00:00Z
- Gate: implement | Verdict: PASS | Classification: feature | Timestamp: 2026-06-08T00:00:00Z
- Gate: review | Verdict: PASS | Classification: feature | Timestamp: 2026-06-08T00:00:00Z
- Gate: test | Verdict: PASS | Classification: feature | Timestamp: 2026-06-08T00:00:00Z
- Gate: handoff | Verdict: PASS | Classification: feature | Timestamp: 2026-06-08T00:00:00Z
- Gate: ship | Verdict: PASS | Classification: feature | Timestamp: 2026-06-08T00:00:00Z

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## External References

| Type | Path / URL | Notes |
|---|---|---|
| Spec | `docs/specs/pre-commit-local-validation.md` | Frozen feature contract. |
| Issue | `https://github.com/KbWen/agentic-os/issues/192` | Source request. |

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## Known Risk

- Risk: local hook could become annoying if it blocks on expensive full validation; mitigation: keep activation opt-in and document exact setup.
- Risk: Windows hook execution path could drift; mitigation: detect Windows-like Git Bash shells and use PowerShell validator when available.
- Rollback plan: revert the branch/PR; no persistent data migration or default hook activation is introduced.

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## Conflict Resolution

none

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## Skill Notes

- Applying verification-before-completion strategy.
  - Checklist: Scope Gate; Quality Gate; Evidence Gate; Risk Gate; Communication Gate.
  - Checklist: focused tests cover hook fail/pass/advisory behavior; validators deferred final PASS until ship updates SSoT.
  - Constraint: no completion claim without reproducible command output.
  - Constraint: failures remain in-progress unless explained and resolved or deferred by phase contract.

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## Drift Log

none

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## Design Reference

none

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## Observability

Sink: not applicable | Scope: local Git hook sample and tests | Verified: yes

---

## Resume

- State: HANDEDOFF
- Completed: spec, plan, implementation, review, focused tests, adversarial hook cases
- Next: run `/ship`: update SSoT Spec Index/Ship History, mark spec shipped, archive Work Log, append archive INDEX entry, run validators, commit and open PR
- Context: Issue #192 is implemented as an opt-in Git hook sample. Validator failures block commits; guarded SSoT receipt warnings remain advisory to preserve existing governance semantics.

### Read Map (for next agent)
- `docs/specs/pre-commit-local-validation.md` → full
- `.githooks/pre-commit.guard-ssot.sample` → full
- `tests/ci/test_pre_commit_hook.py` → full
- `.agentcortex/context/work/codex-issue-192-pre-commit-hook.md` → Phase Summary, Evidence, Resume

### Skip List
- `.agentcortex/bin/validate.sh` — read during discovery; not modified by this feature.
- `.agentcortex/bin/validate.ps1` — read by reference; not modified by this feature.
- `.acx-local/issue-140-comment.md` — unrelated untracked local file, intentionally untouched.

### Context Snapshot (≤ 200 tokens)
Issue #192 asked for a standardized pre-commit hook and setup docs. The repo already had an advisory SSoT guard hook sample, so this branch extends it to run repo-local validators from the Git root, prefer PowerShell validation on Windows Git Bash, and fall back to validate.sh. Tests verify failure blocks, success passes, subdirectory execution works, missing validator blocks, guard warning stays advisory, and README setup is documented.

### Backlog Status (if applicable)
- Active Backlog: `docs/specs/_product-backlog.md`
- Current Feature: GitHub issue #192, not listed in active backlog
- Remaining: active backlog unchanged
- Next Recommended: user choice

---

## Security Findings

none

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## Red Team Findings

- 2026-06-08 /review: 0 findings. Local hook adds no network, auth, dependency, or privilege boundary; validator invocation uses fixed repo-local script paths.

---

## Evidence

- `gh issue view 192 --json ...` -> issue open; asks for `.githooks/` pre-commit hook plus setup docs.
- `rg "pre-commit|githooks|guard-ssot"` -> existing sample and deploy/validator references found; sample did not invoke validators.
- `python -m pytest tests/ci/test_pre_commit_hook.py -q` -> 4 passed in 1.31s.
- `python -m pytest tests/ci/test_pre_commit_hook.py -q` -> 5 passed in 1.34s after adding AC traceability.
- `python -m pytest tests/ci/test_pre_commit_hook.py -q` -> 5 passed in 1.11s after temp-dir cleanup.
- `python -m pytest tests/ci/test_pre_commit_hook.py -q` -> 7 passed in 1.58s.
- Test Files: `tests/ci/test_pre_commit_hook.py` covers AC-1..AC-5 and adversarial missing-validator behavior.
- Review burden of proof: AC-1..AC-5 PROVEN via hook lines 11/26/33/54/62/65/72, README lines 204/209/215/216, and tests lines 3/82/92/100/109/121.
- `bash -n .githooks/pre-commit.guard-ssot.sample` -> passed after test additions.
- `git diff --check` -> no whitespace errors.
- ship:[doc=docs/specs/pre-commit-local-validation.md][code=.githooks/pre-commit.guard-ssot.sample][log=.agentcortex/context/work/codex-issue-192-pre-commit-hook.md]
- final `python -m pytest tests/ci/test_pre_commit_hook.py -q` -> 7 passed in 1.64s.
- final `bash .agentcortex/bin/validate.sh` -> Summary: pass=101 warn=7 fail=0 skip=2.
- final `powershell -ExecutionPolicy Bypass -File .agentcortex/bin/validate.ps1` -> Summary: pass=101 warn=7 fail=0 skip=2.
- `python -m pytest tests/ci tests/guard -q` -> timed out after 304s before completion; not counted as pass evidence.
- `python -m pytest tests/ci/test_pre_commit_hook.py tests/ci/test_deploy_tiering.py -q` -> timed out after 184s before completion; not counted as pass evidence.
- `bash -n .githooks/pre-commit.guard-ssot.sample` -> passed.
- `bash .agentcortex/bin/validate.sh` -> pass=99 warn=8 fail=1 skip=2; only FAIL is SSoT Spec Index completeness for new non-draft spec, to resolve during `/ship`.
- `rg secret-patterns changed-files` -> no matches.
- `git diff --check` -> no whitespace errors.
