{
  "phases": [
    {
      "key": "unbound",
      "title": "Unbound planned phase",
      "objective": "Prove approval-triggered advancement fails terminally on invalid plan roles.",
      "roles": ["missing_role"],
      "expectedArtifact": {
        "path": "artifacts/unbound-spec.json",
        "schema": "dev/spec@1"
      },
      "gates": [],
      "tasks": [
        {
          "id": "TASK-1",
          "title": "Impossible task",
          "role": "missing_role",
          "writeSet": ["src/**"],
          "dependsOn": []
        }
      ]
    }
  ]
}