{
  "task_id": "004-implementation",
  "agent": "agent.07-code",
  "harness": "pi",
  "model": "claude-sonnet-4-5",
  "status": "PASS",
  "summary": "Implemented the governed checkout flow: cart-to-payment handoff, Stripe session creation behind a feature flag, and idempotent order persistence. No placeholder stubs; scope limited to the checkout module.",
  "files_modified": [
    "src/checkout/session.ts",
    "src/checkout/order-store.ts",
    "src/routes/checkout.ts"
  ],
  "tests_run": [
    "npm test -- checkout (18 passing, 0 failing)",
    "npm run typecheck (0 errors)"
  ],
  "risks": [
    "Stripe webhook retries are at-least-once; order persistence is idempotency-keyed to compensate."
  ],
  "next_steps": [
    "005-testing adds integration coverage for the webhook path."
  ],
  "memory_summary": {
    "work_done": "Checkout flow implemented end-to-end with idempotent order writes and a feature flag for rollout.",
    "evidence": [
      "src/checkout/session.ts",
      "npm test -- checkout (18 passing)"
    ]
  },
  "stage_summaries": [
    {
      "stage_id": "07-code",
      "work_done": "Checkout session, order store, and route wired per the approved architecture; error handling covers declined payments and webhook replays.",
      "evidence": [
        "src/routes/checkout.ts",
        "npm run typecheck (0 errors)"
      ]
    }
  ],
  "execution": {
    "tools_used": ["read", "edit", "bash"]
  },
  "cost": {
    "estimated_usd": 1.4,
    "actual_usd": 1.15
  },
  "context": {
    "prompt_tokens": 41250,
    "completion_tokens": 6320
  }
}