$ uv run tools/flow.py push answers/76-lab02-challenge-alert.json
! unpublished '76 Intake · DLQ + error workflow (reference, Lab 02 example 2)' (w01376519d41c1ce): it used the same webhook path
✔ pushed '76 Intake · alert on handled failures (answer, Lab 02 task 1)' (id w82959c505ef75f7)
   POST http://localhost:5678/webhook/my-intake

$ uv run tools/flow.py test cases/lab02-challenge.json -v
✔ before: POST http://localhost:8800/tickets-reset · HTTP 200 · 0.0s · {"cleared": 3}
    → request  POST http://localhost:8800/tickets-reset
      {}
    ← response HTTP 200
      {
        "cleared": 3
      }
✔ before: POST http://localhost:8800/dlq-clear · HTTP 200 · 0.0s · {"cleared": 2}
    → request  POST http://localhost:8800/dlq-clear
      {}
    ← response HTTP 200
      {
        "cleared": 2
      }
✔ before: POST http://localhost:8800/alerts-clear · HTTP 200 · 0.0s · {"cleared": 0}
    → request  POST http://localhost:8800/alerts-clear
      {}
    ← response HTTP 200
      {
        "cleared": 0
      }
✔ 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 · 6 case(s) × 1
✔ 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
      }
✔ API가 멈춤 → DLQ · 4.3s
    → 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"
      }
✔ 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
      }
✔ 처리한 실패도 알림 (high · 개수) · 0.0s
    → request  POST http://localhost:8800/alerts/latest
      {}
    ← response HTTP 200
      {
        "workflow": "intake",
        "node": "Send to DLQ",
        "severity": "high",
        "reason": "dlq",
        "count": 2,
        "message": "2 request(s) could not be created and wait in the DLQ",
        "execution_id": "10120",
        "at": 1793250965.2341518
      }
✔ 실패가 없으면 알림 없음 · 2.9s
    → 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": "낮음"
          },
          {
            "id": "R-103",
            "status": "created",
            "ticket_id": "T-2003",
            "duplicate": false,
            "category": "소프트웨어",
            "priority": "높음"
          }
        ],
        "alert": "none"
      }
✔ 알림은 그대로 1개 · 0.0s
    → request  POST http://localhost:8800/alerts/list
      {}
    ← response HTTP 200
      {
        "count": 1,
        "alerts": [
          {
            "workflow": "intake",
            "node": "Send to DLQ",
            "severity": "high",
            "reason": "dlq",
            "count": 2,
            "message": "2 request(s) could not be created and wait in the DLQ",
            "execution_id": "10120",
            "at": 1793250965.2341518
          }
        ]
      }
✔ before: POST http://localhost:8800/admin/fault · HTTP 200 · 0.0s · {"faq": "ok", "tickets": "error", "prompts": "ok", "usage": "ok", "dlq": "error", "slow_seconds": 8}
    → request  POST http://localhost:8800/admin/fault
      {
        "tickets": "error",
        "dlq": "error"
      }
    ← response HTTP 200
      {
        "faq": "ok",
        "tickets": "error",
        "prompts": "ok",
        "usage": "ok",
        "dlq": "error",
        "slow_seconds": 8
      }
✔ DLQ도 멈추면 critical · 2.4s
    → request  POST /webhook/my-intake
      {
        "requests": [
          {
            "id": "R-201",
            "user": "한지훈",
            "text": "프린터 용지가 걸려요"
          },
          {
            "id": "R-202",
            "user": "한지훈",
            "text": ""
          },
          {
            "id": "R-203",
            "user": "김민지",
            "text": "메일 첨부가 안 열려요"
          }
        ]
      }
    ← response HTTP 200
      {
        "total": 3,
        "created": 0,
        "failed": 2,
        "rejected": 1,
        "duplicates": 0,
        "unclassified": 0,
        "results": [
          {
            "id": "R-201",
            "status": "failed",
            "reason": "500 - \"{\\\"error\\\": \\\"tickets service is failing (fault switch)\\\"}\""
          },
          {
            "id": "R-203",
            "status": "failed",
            "reason": "500 - \"{\\\"error\\\": \\\"tickets service is failing (fault switch)\\\"}\""
          },
          {
            "id": "R-202",
            "status": "rejected",
            "reason": "text is required"
          }
        ],
        "dlq_saved": false,
        "alert": "sent"
      }
✔ 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
      }
✔ 잃어버린 id를 알림에 · 0.0s
    → request  POST http://localhost:8800/alerts/latest
      {}
    ← response HTTP 200
      {
        "workflow": "intake",
        "node": "Send to DLQ",
        "severity": "critical",
        "reason": "dlq_down",
        "count": 2,
        "message": "DLQ save failed: dlq service is failing (fault switch) · lost ids R-201, R-203",
        "execution_id": "10122",
        "ids": [
          "R-201",
          "R-203"
        ],
        "at": 1793250970.5394928
      }
Passed 6/6
report: runs/lab02-challenge-20261029-141610.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
      }

$ uv run tools/flow.py test cases/lab02-nets.json
✔ before: POST http://localhost:8800/tickets-reset · HTTP 200 · 0.0s · {"cleared": 3}
✔ before: POST http://localhost:8800/dlq-clear · HTTP 200 · 0.0s · {"cleared": 2}
✔ before: POST http://localhost:8800/alerts-clear · HTTP 200 · 0.0s · {"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}
POST http://localhost:5678/webhook/my-intake · 7 case(s) × 1
✔ 1 · 잘못된 항목 → 결과에만 (rejected) · 2.1s
✔ before: POST http://localhost:8800/admin/fault · HTTP 200 · 0.0s · {"faq": "ok", "tickets": "error", "prompts": "ok", "usage": "ok", "dlq": "ok", "slow_seconds": 8}
✔ 2 · API 오류 → failed · 2.9s
✔ 3 · failed는 DLQ에 · 0.0s
✔ 4 · 버그 → 500 · 0.1s
… before: wait 3s
✔ 5 · Error Workflow → critical 알림 · 0.0s
✔ before: POST http://localhost:8800/admin/fault · HTTP 200 · 0.0s · {"faq": "ok", "tickets": "error", "prompts": "ok", "usage": "ok", "dlq": "error", "slow_seconds": 8}
✔ 6 · DLQ마저 멈추면 결과가 알려야 · 3.7s
✔ 7 · DLQ가 멈춘 것을 누가 아나 (critical · dlq_down) · 0.0s
Passed 7/7
report: runs/lab02-nets-20261029-141622.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}

$ uv run tools/flow.py test cases/lab02.json
✔ before: POST http://localhost:8800/tickets-reset · HTTP 200 · 0.0s · {"cleared": 2}
✔ before: POST http://localhost:8800/dlq-clear · HTTP 200 · 0.0s · {"cleared": 2}
✔ before: POST http://localhost:8800/alerts-clear · HTTP 200 · 0.0s · {"cleared": 3}
✔ before: POST http://localhost:8800/admin/fault · HTTP 200 · 0.0s · {"faq": "ok", "tickets": "ok", "prompts": "ok", "usage": "ok", "dlq": "ok", "slow_seconds": 8}
POST http://localhost:5678/webhook/my-intake · 4 case(s) × 1
✔ before: POST http://localhost:8800/admin/fault · HTTP 200 · 0.0s · {"faq": "ok", "tickets": "error", "prompts": "ok", "usage": "ok", "dlq": "ok", "slow_seconds": 8}
✔ 예제 1 · API가 멈추면 실패로 표시 · 200 · 2.7s
✔ after: POST http://localhost:8800/admin/fault · HTTP 200 · 0.0s · {"faq": "ok", "tickets": "ok", "prompts": "ok", "usage": "ok", "dlq": "ok", "slow_seconds": 8}
✔ 예제 1 · 실패한 2건은 DLQ에 · 0.0s
✔ 예제 2 · 예상 못 한 오류 (nightly-report) · 0.0s
… before: wait 3s
✔ 예제 2 · Error Workflow가 알림을 남김 · 0.0s
Passed 4/4
report: runs/lab02-20261029-141628.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}

$ uv run tools/flow.py ops
fault switch: all ok
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]