Phase Checkpoint

Phase $1 is complete. Run the checkpoint criteria from EXECUTION_PLAN.md.

AUTONOMY RULE: Never invoke skills via the Skill tool mid-checkpoint — it creates a turn boundary that breaks procedural flow. Use the Task tool (subagent) for any delegated work. Do NOT use AskUserQuestion during the checkpoint — it pauses the auto-advance chain. If something is ambiguous, use a deterministic default and report it.

Workflow

Copy this checklist and track progress:

Phase Checkpoint Progress:
- [ ] Step 1: Context detection
- [ ] Step 2: Tool availability & config
- [ ] Step 3: Local verification (automated, optional, manual)
- [ ] Step 4: Cross-model review (Codex)
- [ ] Step 5: Production verification
- [ ] Step 6: State update
- [ ] Step 7: Generate report
- [ ] Step 8: Auto-advance check

Step 1: Context Detection

Determine working context:

1. If CWD matches */features/*:

   • PROJECT_ROOT = parent of parent of CWD
   • MODE = "feature"

2. If CWD matches */plans/greenfield*:

   • PROJECT_ROOT = parent of parent of CWD
   • MODE = "greenfield"

3. Otherwise:

   • PROJECT_ROOT = current working directory
   • MODE = "greenfield-legacy"

Directory Guard: Confirm EXECUTION_PLAN.md exists. If not, STOP and tell user to cd into the scoped directory containing the active execution plan. If plans/greenfield/EXECUTION_PLAN.md exists in the current directory, tell them to cd plans/greenfield first.

Context Check: If context is below 40% remaining, run /compact first.

Step 2: Tool Availability & Config

Check which optional tools are available:

Browser fallback chain: ExecuteAutomation → Browser MCP → Microsoft Playwright → Chrome DevTools → Manual

Read .claude/verification-config.json from PROJECT_ROOT. If missing entirely, run /configure-verification. Omitted keys mean those checks are not configured — skip them rather than blocking.

Read .claude/settings.local.json for cross-model review config:

{
  "codexReview": {
    "enabled": true,
    "triggerOn": ["phase-checkpoint"]
  }
}

If codexReview is not configured, default to enabled: true when Codex CLI is available.

Step 3: Local Verification (Must Pass First)

IMPORTANT: All local verification must pass before production verification.

See VERIFICATION.md for detailed check procedures. See also DEFERRED_QUEUE.md for the deferred review queue format and processing rules.

Automated Checks

Run these using commands from verification-config (skip any that are not configured):

1. Tests (commands.test) — skip if not in config
2. Type Checking (commands.typecheck) — skip if not in config
3. Linting (commands.lint) — skip if not in config
4. Build (commands.build) — skip if not in config
5. Mutation Tests (commands.mutation_test) — skip if not in config
6. Dev Server (devServer.command) — skip if not in config
7. Security Scan
8. Code Quality Metrics

If commands.mutation_test is configured, treat failures as a local verification failure (it is part of the quality gate).

Optional Checks

• Code Simplification (if code-simplifier available)
• Browser Verification (if browser tools available)
• Technical Debt Check (if skill exists)

Manual Verification

1. Extract manual items from "Phase $1 Checkpoint" in EXECUTION_PLAN.md
2. Attempt automation using auto-verify skill (via Task tool, not Skill tool)
3. Classify remaining items:
   • MANUAL:DEFER → enqueue to deferred review queue (see DEFERRED_QUEUE.md)
   • MANUAL (blocking) → stop checkpoint and stop auto-advance
4. If blocking items exist: report them in the checkpoint output and stop. Do NOT use AskUserQuestion — just list the items and halt auto-advance.
5. If only deferred items: continue, report queue status
6. Update checkboxes in EXECUTION_PLAN.md

For external integrations, follow DOCS_PROTOCOL.md to fetch latest documentation.

Step 4: Cross-Model Review (Codex)

Purpose: Get a second opinion from a different AI model to catch blind spots.

When This Step Runs

This step runs if ALL of these conditions are true:

• Codex CLI is available (codex --version succeeds)
• codexReview.enabled is true (or not configured, defaulting to true)
• "phase-checkpoint" is in codexReview.triggerOn (or not configured)

Execution

IMPORTANT — Invocation Method: Do NOT invoke /codex-review via the Skill tool. The Skill tool creates a turn boundary that breaks the checkpoint's procedural flow and prevents auto-advance from continuing. Use the Task tool instead.

1. Gather phase context:

   # Identify technologies from changed files for --research flag
   # Check package.json, imports in changed files
   

2. Launch Task subagent to perform the Codex review inline:

   • subagent_type: general-purpose
   • Include in the prompt:
     • The technologies/research topics identified in step 1
     • Any focus area (e.g., security)
     • The base branch and model from config
   • Instruct the subagent to: a. Read .claude/skills/codex-review/SKILL.md and follow Steps 1-5 b. Read supporting files as needed (CODEX_INVOCATION.md, PROMPT_TEMPLATE.md, EVALUATION_PRACTICES.md) c. Return structured JSON with status, critical_issues, recommendations, positive_findings

   The Task tool returns results to the current turn, preserving checkpoint state.

3. Process results from the Task subagent:

   Codex Status	Checkpoint Action
   pass	Continue, note in report
   pass_with_notes	Auto-implement recommendations, continue
   needs_attention	Auto-implement all findings, continue
   skipped	Note unavailable, continue
   error	Note error, continue

Auto-Implement Findings

When Codex returns findings (pass_with_notes or needs_attention), implement them automatically. Do NOT ask the user — this keeps the auto-advance chain flowing.

1. Launch Task subagent to implement all findings:

   • subagent_type: general-purpose
   • Include in the prompt:
     • All critical issues with file:line locations and suggestions
     • All recommendations with file:line locations and suggestions
     • Instruct: "Implement each fix. If a suggestion is too vague to act on (no specific file/line or actionable change), skip it and note why. Do NOT use AskUserQuestion — if anything is ambiguous, skip it. Do NOT create new files unless a fix explicitly requires it."
   • The subagent edits files and returns a summary of what it changed

2. Re-run automated verification (same commands from Step 3):

   • Tests, typecheck, lint, build — whatever is configured in verification-config
   • This confirms the fixes don't break anything

3. Handle re-verification results:

   Outcome	Action
   All checks pass	Commit: git add -u && git commit -m "fix: address Codex review findings (phase $1 checkpoint)", note "{N} findings auto-fixed" in report
   Any check fails	Revert: git checkout -- ., note "fixes reverted — broke verification" in report, log findings to deferred queue

   Git safety notes:

   • Use git add -u (tracked files only) — never git add -A which can stage untracked artifacts
   • Commit only after verification passes — no commit to undo on failure
   • git checkout -- . reverts working tree changes without needing git reset --hard
   • If pre-commit hooks fail the commit, treat as "skip auto-commit" and continue

4. Continue to Step 5 regardless of outcome — Codex findings never block.

Output

Cross-Model Review (Codex):
- Status: PASS | PASS WITH NOTES | NEEDS ATTENTION | SKIPPED
- Findings: {N} critical, {M} recommendations
- Auto-implemented: {X} fixes applied, {Y} skipped (too vague)
- Verification: PASSED | REVERTED (logged to deferred queue)

Skip Conditions

Skip this step (mark as SKIPPED) if:

• Running inside Codex CLI ($CODEX_SANDBOX is set) — /codex-review detects this automatically
• Codex CLI not installed
• codexReview.enabled is explicitly false
• Phase has fewer than 3 tasks (trivial phase)
• --skip-codex flag passed to checkpoint

Step 5: Production Verification

BLOCKED until all Local Verification passes.

When local passes, verify:

• Staging/production deployment
• External integrations
• Production-only manual checks

Step 6: State Update

After checkpoint passes, update .claude/phase-state.json:

{
  "phases": [{
    "number": 1,
    "status": "CHECKPOINTED",
    "completed_at": "{ISO timestamp}",
    "checkpoint": {
      "tests_passed": true,
      "type_check_passed": true,
      "lint_passed": true,
      "security_passed": true,
      "mutation_tests_passed": true,
      "coverage_percent": 85,
      "manual_verified": true,
      "codex_review": {
        "status": "pass | pass_with_notes | needs_attention | skipped",
        "critical_issues": 0,
        "recommendations": 2,
        "auto_fixed": 2,
        "fix_skipped": 0,
        "fix_reverted": false
      }
    }
  }]
}

Write checkpoint report to .claude/verification/phase-$1.md and append to .claude/verification-log.jsonl.

Step 7: Report

Phase $1 Checkpoint Results
===========================

Tool Availability:
- ExecuteAutomation Playwright: ✓ | ✗
- Browser MCP: ✓ | ✗
- Chrome DevTools MCP: ✓ | ✗
- code-simplifier: ✓ | ✗
- Codex CLI: ✓ | ✗

## Local Verification

Automated Checks:
- Tests: PASSED | FAILED
- Type Check: PASSED | FAILED | SKIPPED
- Linting: PASSED | FAILED | SKIPPED
- Build: PASSED | FAILED | SKIPPED
- Mutation Tests: PASSED | FAILED | SKIPPED
- Security: PASSED | FAILED

Optional Checks:
- Browser Verification: PASSED | SKIPPED
  - Target: {URL}
- Tech Debt: PASSED | NOTES | SKIPPED

Manual Checks:
- Automated: {X} items
- Blocking manual: {Y} items
- Deferred: {Z} items (queued for later review)
- Total deferred queue: {M} items across {P} phases

Local Verification: ✓ PASSED | ✗ FAILED

---

## Cross-Model Review (Codex)

Status: PASS | PASS WITH NOTES | NEEDS ATTENTION | SKIPPED
{If not skipped}
- Findings: {N} critical, {M} recommendations
- Auto-implemented: {X} fixes applied, {Y} skipped (too vague)
- Verification: PASSED | REVERTED (logged to deferred queue)
{If reverted}
- Reverted fixes logged to deferred queue for later review
{/If}
{/If}

---

## Production Verification
{items or "Blocked: Complete local verification first"}

---

Overall: Ready to proceed | Issues to address

Step 8: Auto-Advance

See AUTO_ADVANCE.md for auto-advance logic.

Summary: If all checks pass and no blocking manual items remain, automatically invoke /phase-prep {N+1}. MANUAL:DEFER items are queued and do not block.

Codex review and auto-advance: Codex findings are auto-implemented inline. If fixes pass re-verification they are committed; if they fail, they are reverted and logged to the deferred queue. Either way, auto-advance is never blocked.

Error Handling

When Checkpoint Cannot Pass

If both local AND production verification fail:

• Report all failures clearly, separated by category
• Do NOT suggest skipping checks
• Prioritize: Fix local failures first (they often cause production failures)
• Suggest: Run /phase-start $1 to address failing tasks before re-running checkpoint

If blocking manual verification items remain after auto-verify:

• Stop the checkpoint and report which items blocked it
• Do NOT use AskUserQuestion — just halt and list the items
• The user can re-run /phase-checkpoint $1 after manual resolution
• Note: Blocking items prevent auto-advance (this is by design)

If verification config file is missing entirely:

• Run /configure-verification to auto-detect
• Omitted keys in an existing config are intentional — skip those checks

If auto-advance chain should stop:

• Report: "Auto-advance stopped at Phase $1 checkpoint"
• List specific blocking items
• Provide: "Run /phase-checkpoint $1 again after resolving issues"

If a tool consistently fails mid-checkpoint:

• Mark that specific check as FAILED (not SKIPPED)
• Continue with remaining checks
• Report tool failure in final summary
• Suggest troubleshooting steps for the failing tool

If Codex review times out or errors:

• Mark as SKIPPED with reason
• Do NOT block checkpoint progress
• Note in report: "Cross-model review unavailable: {reason}"
• Suggest: Re-run /codex-review manually after checkpoint if desired

If Codex finds critical issues:

• Auto-implement all findings (see "Auto-Implement Findings" in Step 4)
• If fixes pass re-verification, commit with git add -u and continue
• If fixes break re-verification, revert with git checkout -- . and log to deferred queue
• Continue without pausing — cross-model review never blocks
• Do NOT use AskUserQuestion — this breaks auto-advance

REMINDER: Local verification must pass before production verification. If any local check fails, stop and report — do not proceed to production checks.