---

name: codex-validate-plan description: Validate architecture/plan quality via claude-delegator (Plan Reviewer expert). Use after writing context.md for complex feature/refactor work. context: fork

Codex Plan Validation (via claude-delegator)

When to use

• complexity: complex
• taskType: feature or refactor
• context.md exists or was updated

Procedure

1. Collect the path to context.md (default: {tasksRoot}/{feature-name}/context.md) and read its content
2. Build delegation prompt using the 7-section format below
3. Try Codex first:
   • Call mcp__codex__codex (include Plan Reviewer instructions in developer-instructions)
   • If successful, proceed to step 5
4. Fallback to Claude (if Codex unavailable):
   • Error conditions: "quota exceeded", "rate limit", "API error", "unavailable"
   • Claude directly performs the plan review following the Plan Reviewer guidelines below
   • Add note: "codex-fallback: Claude performed review directly"
5. Summarize critical/warning/suggestion items and decide pass/fail
6. Per .claude/docs/guidelines/document-memory-policy.md: Store full review in archives/review-v{n}.md, keep only short summary in context.md

Delegation Format

Use the 7-section format:

CopyTASK: Review implementation plan at [context.md path] for completeness and clarity.

EXPECTED OUTCOME: APPROVE/REJECT verdict with specific feedback.

CONTEXT:
- Plan to review: [content of context.md]
- Goals: [what the plan is trying to achieve]
- Constraints: [project constraints]

MUST DO:
- Evaluate all 4 criteria (Clarity, Verifiability, Completeness, Big Picture)
- Simulate actually doing the work to find gaps
- Provide specific improvements if rejecting

MUST NOT DO:
- Rubber-stamp without real analysis
- Provide vague feedback
- Approve plans with critical gaps

OUTPUT FORMAT:
[APPROVE / REJECT]
Justification: [explanation]
Summary: [4-criteria assessment]
[If REJECT: Top 3-5 improvements needed]

Tool Call

Copymcp__codex__codex({
  prompt: "[7-section delegation prompt with full context]",
  "developer-instructions": "[contents of plan-reviewer.md]",
  sandbox: "read-only",  // Advisory mode
  cwd: "[current working directory]"
})

Output (patch)

Copynotes:
  - "codex-plan: [APPROVE/REJECT], warnings=[count]"