Codex Integration Validation (via claude-delegator)

When to use

• complexity

  :

  complex

  (always)
• OR

  apiSpecConfirmed == true && hasMockImplementation == true

• Integration with external APIs
• Multi-component changes

Procedure

1. Summarize change scope, endpoints, and integration points
2. Capture the context.md path (default:

   {tasksRoot}/{feature-name}/context.md

   ) and read relevant code
3. Build delegation prompt using the 7-section format below (integration-focused)
4. Try Codex first:
   • Call

     mcp__codex__codex

     (include Integration Reviewer instructions in developer-instructions)
   • If successful, proceed to step 6
5. Fallback to Claude (if Codex unavailable):
   • Error conditions: "quota exceeded", "rate limit", "API error", "unavailable"
   • Claude directly performs integration review following the guidelines below
   • Add note:

     "codex-fallback: Claude performed integration review directly"

6. Record regression risks and additional test scenarios
7. If a saved report is needed, store the full review in

   {tasksRoot}/{feature-name}/archives/

   and keep only a short summary in

   context.md

Delegation Format

Use the 7-section format with integration focus:

TASK: Validate integration changes at [context.md path] for regression risks and contract compliance.

EXPECTED OUTCOME: Regression risk assessment with additional test scenarios.

CONTEXT:
- Integration to validate: [feature/API description]
- Changed files: [list of modified files]
- API endpoints affected:
  * [Endpoint 1: method, path, purpose]
  * [Endpoint 2: method, path, purpose]
- Integration points: [external systems, services, databases]

CONSTRAINTS:
- Must maintain backward compatibility
- Existing contracts must not break
- Technical stack: [languages, frameworks, API versions]

MUST DO:
- Identify regression risks across all integration points
- Verify contract compliance (request/response schemas)
- Check edge cases and error handling for each endpoint
- Assess performance implications of integration changes
- Identify missing test scenarios
- Check for proper error handling and retry logic

MUST NOT DO:
- Approve without checking all integration points
- Ignore backward compatibility concerns
- Skip edge case analysis

OUTPUT FORMAT:
Summary → Regression risks → Contract compliance → Edge cases → Performance concerns → Missing test scenarios → Additional tests needed

Tool Call

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

For Implementation Mode (Add Tests)

If you want the expert to implement missing tests:

mcp__codex__codex({
  prompt: "[same 7-section format, but add: 'Implement the missing test scenarios identified']",
  "developer-instructions": "[contents of code-reviewer.md]",
  sandbox: "workspace-write",  // Implementation mode - can add test files
  cwd: "[current working directory]"
})

Output (patch)

notes:
  - "codex-integration: [PASS/FAIL], regression-risks=[count], extra-tests=[count]"