{
  "handoff_id": "HND-YYYYMMDD-001",
  "timestamp_utc": "2026-01-01T00:00:00.000Z",
  "router": {
    "from": "ACE-Orchestrator",
    "via": "ACE-Orchestrator",
    "to": "ACE-Coders"
  },
  "task": {
    "title": "Short task title",
    "type": "engineering",
    "priority": "P1",
    "owner": "ACE-CODERS",
    "depends_on": [],
    "scope": "Bounded scope statement"
  },
  "context": {
    "business_requirement": "path/to/file.md#line",
    "design_constraint": "path/to/file.md#line",
    "engineering_constraint": "path/to/file.md#line",
    "directive": "Precise action directive"
  },
  "acceptance_criteria": [
    "Criterion 1 with measurable condition",
    "Criterion 2 with measurable condition"
  ],
  "deliverables": [
    "path/to/updated/artifact"
  ],
  "verification": {
    "required_evidence": [
      "artifact_pointers",
      "verification_evidence"
    ],
    "review_check": "Would a staff engineer approve this?",
    "status": "pending"
  },
  "risks": [],
  "open_questions": [],
  "lessons_hook": {
    "on_correction_update": "tasks/lessons.md",
    "rule_format": "Never <bad pattern>; always <guardrail>."
  },
  "return_payload_contract": {
    "must_include": [
      "updated_artifact_pointers",
      "verification_evidence",
      "residual_risks",
      "explicit_blockers_or_done_state"
    ]
  }
}