{
  "issueNumber": 458,
  "branchName": "feat/458-route-idempotency",
  "generatedAt": "2026-04-13T12:00:00Z",
  "stories": [
    {
      "id": "S1",
      "title": "Guard createTask() against unique-constraint race condition",
      "priority": 1,
      "dependsOn": [],
      "acceptanceCriteria": [
        "createTask() wrapped with try/catch or converted to upsert in TaskStateService",
        "Calling route() twice with same event creates exactly one task row",
        "Existing task state is not reset on retry"
      ],
      "passes": false,
      "completedAt": null
    },
    {
      "id": "S2",
      "title": "Guard phase hooks against duplicate comments and labels",
      "priority": 2,
      "dependsOn": [
        "S1"
      ],
      "acceptanceCriteria": [
        "onPlanComplete(), onDeliverComplete(), onCompoundComplete() check state before posting comments",
        "onPhaseBlocked() skips duplicate blocked comments",
        "Calling hooks twice for same phase produces exactly one comment"
      ],
      "passes": false,
      "completedAt": null
    },
    {
      "id": "S3",
      "title": "Verify invoke() cannot double-enqueue and add defensive guard",
      "priority": 3,
      "dependsOn": [
        "S1"
      ],
      "acceptanceCriteria": [
        "Phase-status 'active' guard confirmed in route() prevents second executePhase()",
        "Defensive early-return added in executePhase() if phase already active on re-entry"
      ],
      "passes": false,
      "completedAt": null
    },
    {
      "id": "S4",
      "title": "Write retry-idempotency unit tests for route() and hooks",
      "priority": 4,
      "dependsOn": [
        "S1",
        "S2",
        "S3"
      ],
      "acceptanceCriteria": [
        "Test: route() called twice with same event → createTask once, invoke once, hooks once",
        "Test: onPhaseComplete() called twice → one comment posted",
        "npm run test passes",
        "npm run lint passes",
        "npm run build passes"
      ],
      "passes": false,
      "completedAt": null
    }
  ]
}