{
  "task_id": "004-implementation",
  "validator": "rstack-pi-extension",
  "harness": "pi",
  "model": null,
  "validator_type": "code",
  "validator_profile": {
    "stage_id": "07-code",
    "validator": "validator.07-code",
    "model_hint": "haiku",
    "required_checks": [
      "builder_contract_complete",
      "files_modified_exist",
      "tests_run_evidence",
      "no_placeholder_stubs"
    ]
  },
  "status": "PASS",
  "checks": [
    { "name": "builder_has_task_id", "status": "PASS", "evidence": "present" },
    { "name": "builder_status_allowed", "status": "PASS", "evidence": "PASS" },
    { "name": "builder_task_id_matches", "status": "PASS", "evidence": "004-implementation" },
    { "name": "builder_summary_meaningful", "status": "PASS", "evidence": "summary present" },
    { "name": "builder_tests_run_has_evidence", "status": "PASS", "evidence": "2 item(s)" },
    { "name": "builder_memory_summary_exists", "status": "PASS", "evidence": "present" },
    { "name": "stage_summary_07-code_exists", "status": "PASS", "evidence": "present" },
    { "name": "files_modified_exist", "status": "PASS", "evidence": "3 of 3 claimed files present" },
    { "name": "tests_run_evidence", "status": "PASS", "evidence": "npm test -- checkout (18 passing, 0 failing)" },
    { "name": "no_placeholder_stubs", "status": "PASS", "evidence": "no TODO/FIXME stub signatures in files_modified" },
    { "name": "review_independence", "status": "PASS", "evidence": "builder harness 'pi' judged by external validator harness 'claude-code' — cross-harness review satisfied" }
  ],
  "issues": [],
  "independence": {
    "status": "PASS",
    "enforced": true,
    "explanation": "builder harness 'pi' judged by external validator harness 'claude-code' — cross-harness review satisfied"
  },
  "retry_recommendation": "none"
}