$ uv run tools/flow.py ops --reset
✔ created tickets, DLQ and alerts emptied, fault switch all ok

$ uv run tools/flow.py fault tickets error
✔ fault switch: {"faq": "ok", "tickets": "error", "prompts": "ok", "usage": "ok", "dlq": "ok", "slow_seconds": 8}

$ uv run tools/flow.py call my-intake requests/batch-two.json
HTTP 200 · 2.8s
{
  "total": 2,
  "created": 0,
  "failed": 2,
  "rejected": 0,
  "duplicates": 0,
  "unclassified": 0,
  "results": [
    {
      "id": "R-301",
      "status": "failed",
      "reason": "500 - \"{\\\"error\\\": \\\"tickets service is failing (fault switch)\\\"}\""
    },
    {
      "id": "R-302",
      "status": "failed",
      "reason": "500 - \"{\\\"error\\\": \\\"tickets service is failing (fault switch)\\\"}\""
    }
  ],
  "dlq_saved": true,
  "alert": "sent"
}

$ uv run tools/flow.py call nightly-report
HTTP 500 · 0.1s
{
  "message": "Error in workflow"
}

$ uv run tools/flow.py ops
fault switch: {"tickets": "error"}
created tickets: 0
DLQ: 2 (parked 0)
  D-1  R-301  attempts 1  parked False  500 - "{\"error\": \"tickets service is failing (f
  D-2  R-302  attempts 1  parked False  500 - "{\"error\": \"tickets service is failing (f
alerts: 2
  [high] intake · dlq · Send to DLQ · count 2 · 2 request(s) could not be created and wait in the DLQ
  [critical] 76 Nightly report (provided, has a bug) · unexpected · Count by category · rows is not iterable [line 4]

$ uv run tools/flow.py fault tickets ok
✔ fault switch: {"faq": "ok", "tickets": "ok", "prompts": "ok", "usage": "ok", "dlq": "ok", "slow_seconds": 8}

$ uv run tools/flow.py call my-replay
HTTP 200 · 1.4s
{
  "replayed": 2,
  "ok": 2,
  "still_failed": 0,
  "parked": 0,
  "duplicates": 0
}

$ uv run tools/flow.py ops
fault switch: all ok
created tickets: 2
  T-2001  key R-302  장비/보통  노트북 배터리가 금방 닳아요
  T-2002  key R-301  계정/높음  사내 위키 로그인이 안 돼요
DLQ: 0 (parked 0)
alerts: 2
  [high] intake · dlq · Send to DLQ · count 2 · 2 request(s) could not be created and wait in the DLQ
  [critical] 76 Nightly report (provided, has a bug) · unexpected · Count by category · rows is not iterable [line 4]

$ uv run tools/flow.py test cases/lab03-drill.json -v
✔ before: POST http://localhost:8800/tickets-reset · HTTP 200 · 0.0s · {"cleared": 2}
    → request  POST http://localhost:8800/tickets-reset
      {}
    ← response HTTP 200
      {
        "cleared": 2
      }
✔ before: POST http://localhost:8800/dlq-clear · HTTP 200 · 0.0s · {"cleared": 0}
    → request  POST http://localhost:8800/dlq-clear
      {}
    ← response HTTP 200
      {
        "cleared": 0
      }
✔ before: POST http://localhost:8800/alerts-clear · HTTP 200 · 0.0s · {"cleared": 2}
    → request  POST http://localhost:8800/alerts-clear
      {}
    ← response HTTP 200
      {
        "cleared": 2
      }
✔ before: POST http://localhost:8800/admin/fault · HTTP 200 · 0.0s · {"faq": "ok", "tickets": "ok", "prompts": "ok", "usage": "ok", "dlq": "ok", "slow_seconds": 8}
    → request  POST http://localhost:8800/admin/fault
      {
        "faq": "ok",
        "tickets": "ok",
        "prompts": "ok",
        "usage": "ok",
        "dlq": "ok"
      }
    ← response HTTP 200
      {
        "faq": "ok",
        "tickets": "ok",
        "prompts": "ok",
        "usage": "ok",
        "dlq": "ok",
        "slow_seconds": 8
      }
POST http://localhost:5678/webhook/my-intake · 7 case(s) × 1
✔ 1 · 평소 · 2.6s
    → request  POST /webhook/my-intake
      {
        "requests": [
          {
            "id": "R-101",
            "user": "이준호",
            "text": "VPN이 아침부터 계속 끊겨서 고객 미팅을 못 하고 있어요"
          },
          {
            "id": "R-102",
            "user": "박서연",
            "text": "새 모니터를 하나 더 받을 수 있을까요?"
          },
          {
            "id": "R-103",
            "user": "최유진",
            "text": "엑셀 라이선스가 만료됐다고 나와요"
          }
        ]
      }
    ← response HTTP 200
      {
        "total": 3,
        "created": 3,
        "failed": 0,
        "rejected": 0,
        "duplicates": 0,
        "unclassified": 0,
        "results": [
          {
            "id": "R-101",
            "status": "created",
            "ticket_id": "T-2001",
            "duplicate": false,
            "category": "네트워크",
            "priority": "높음"
          },
          {
            "id": "R-102",
            "status": "created",
            "ticket_id": "T-2002",
            "duplicate": false,
            "category": "장비",
            "priority": "보통"
          },
          {
            "id": "R-103",
            "status": "created",
            "ticket_id": "T-2003",
            "duplicate": false,
            "category": "소프트웨어",
            "priority": "높음"
          }
        ],
        "alert": "none"
      }
✔ before: POST http://localhost:8800/admin/fault · HTTP 200 · 0.0s · {"faq": "ok", "tickets": "error", "prompts": "ok", "usage": "ok", "dlq": "ok", "slow_seconds": 8}
    → request  POST http://localhost:8800/admin/fault
      {
        "tickets": "error"
      }
    ← response HTTP 200
      {
        "faq": "ok",
        "tickets": "error",
        "prompts": "ok",
        "usage": "ok",
        "dlq": "ok",
        "slow_seconds": 8
      }
✔ 2 · 장애 시작 · API 오류 · 3.0s
    → request  POST /webhook/my-intake
      {
        "requests": [
          {
            "id": "R-301",
            "user": "정우성",
            "text": "사내 위키 로그인이 안 돼요"
          },
          {
            "id": "R-302",
            "user": "이준호",
            "text": "노트북 배터리가 금방 닳아요"
          }
        ]
      }
    ← response HTTP 200
      {
        "total": 2,
        "created": 0,
        "failed": 2,
        "rejected": 0,
        "duplicates": 0,
        "unclassified": 0,
        "results": [
          {
            "id": "R-301",
            "status": "failed",
            "reason": "500 - \"{\\\"error\\\": \\\"tickets service is failing (fault switch)\\\"}\""
          },
          {
            "id": "R-302",
            "status": "failed",
            "reason": "500 - \"{\\\"error\\\": \\\"tickets service is failing (fault switch)\\\"}\""
          }
        ],
        "dlq_saved": true,
        "alert": "sent"
      }
✔ 3 · DLQ 확인 · 0.0s
    → request  POST http://localhost:8800/dlq/list
      {}
    ← response HTTP 200
      {
        "size": 2,
        "parked": 0,
        "items": [
          {
            "dlq_id": "D-1",
            "attempts": 1,
            "parked": false,
            "item": {
              "id": "R-301",
              "user": "정우성",
              "text": "사내 위키 로그인이 안 돼요"
            },
            "reason": "500 - \"{\\\"error\\\": \\\"tickets service is failing (fault switch)\\\"}\"",
            "workflow": "intake",
            "at": 1793251069.7296107
          },
          {
            "dlq_id": "D-2",
            "attempts": 1,
            "parked": false,
            "item": {
              "id": "R-302",
              "user": "이준호",
              "text": "노트북 배터리가 금방 닳아요"
            },
            "reason": "500 - \"{\\\"error\\\": \\\"tickets service is failing (fault switch)\\\"}\"",
            "workflow": "intake",
            "at": 1793251069.7296135
          }
        ]
      }
✔ 4 · 보고서 작업도 실패 · 0.0s
    → request  POST /webhook/nightly-report
      {}
    ← response HTTP 500
      {
        "message": "Error in workflow"
      }
… before: wait 3s
✔ 5 · 알림 확인 · 0.0s
    → request  POST http://localhost:8800/alerts/latest
      {}
    ← response HTTP 200
      {
        "workflow": "76 Nightly report (provided, has a bug)",
        "workflow_id": "wb9ce32c18d7df56",
        "node": "Count by category",
        "message": "rows is not iterable [line 4]",
        "execution_id": "10159",
        "severity": "critical",
        "reason": "unexpected",
        "at": 1793251069.8482687
      }
✔ before: POST http://localhost:8800/admin/fault · HTTP 200 · 0.0s · {"faq": "ok", "tickets": "ok", "prompts": "ok", "usage": "ok", "dlq": "ok", "slow_seconds": 8}
    → request  POST http://localhost:8800/admin/fault
      {
        "faq": "ok",
        "tickets": "ok",
        "prompts": "ok",
        "usage": "ok",
        "dlq": "ok"
      }
    ← response HTTP 200
      {
        "faq": "ok",
        "tickets": "ok",
        "prompts": "ok",
        "usage": "ok",
        "dlq": "ok",
        "slow_seconds": 8
      }
✔ 6 · 고친 뒤 재처리 · 1.4s
    → request  POST /webhook/my-replay
      {}
    ← response HTTP 200
      {
        "replayed": 2,
        "ok": 2,
        "still_failed": 0,
        "parked": 0,
        "duplicates": 0
      }
✔ 7 · 결과 확인 · 중복 없이 5건 · 0.0s
    → request  POST http://localhost:8800/tickets-created/list
      {}
    ← response HTTP 200
      {
        "count": 5,
        "tickets": [
          {
            "ticket_id": "T-2001",
            "key": "R-101",
            "title": "VPN이 아침부터 계속 끊겨서 고객 미팅을 못 하고 있어요",
            "requester": "이준호",
            "category": "네트워크",
            "priority": "높음"
          },
          {
            "ticket_id": "T-2002",
            "key": "R-102",
            "title": "새 모니터를 하나 더 받을 수 있을까요?",
            "requester": "박서연",
            "category": "장비",
            "priority": "보통"
          },
          {
            "ticket_id": "T-2003",
            "key": "R-103",
            "title": "엑셀 라이선스가 만료됐다고 나와요",
            "requester": "최유진",
            "category": "소프트웨어",
            "priority": "높음"
          },
          {
            "ticket_id": "T-2004",
            "key": "R-302",
            "title": "노트북 배터리가 금방 닳아요",
            "requester": "이준호",
            "category": "장비",
            "priority": "보통"
          },
          {
            "ticket_id": "T-2005",
            "key": "R-301",
            "title": "사내 위키 로그인이 안 돼요",
            "requester": "정우성",
            "category": "계정",
            "priority": "높음"
          }
        ]
      }
Passed 7/7
report: runs/lab03-drill-20261029-141754.json
✔ after: POST http://localhost:8800/admin/fault · HTTP 200 · 0.0s · {"faq": "ok", "tickets": "ok", "prompts": "ok", "usage": "ok", "dlq": "ok", "slow_seconds": 8}
    → request  POST http://localhost:8800/admin/fault
      {
        "faq": "ok",
        "tickets": "ok",
        "prompts": "ok",
        "usage": "ok",
        "dlq": "ok"
      }
    ← response HTTP 200
      {
        "faq": "ok",
        "tickets": "ok",
        "prompts": "ok",
        "usage": "ok",
        "dlq": "ok",
        "slow_seconds": 8
      }