$ uv run tools/flow.py push answers/75-lab03-challenge2-what-if.json
! unpublished '75 Cost report (answer)' (w1f9c668c0305daf): it used the same webhook path
✔ pushed '75 Cost report + what-if (answer)' (id wc7211a27bb523f0)
   POST http://localhost:5678/webhook/my-cost-report

$ uv run tools/flow.py test cases/lab03-challenge2.json -v
✔ before: POST http://localhost:8800/usage-clear · HTTP 200 · 0.0s · {"cleared": 0}
    → request  POST http://localhost:8800/usage-clear
      {}
    ← response HTTP 200
      {
        "cleared": 0
      }
✔ before: POST http://localhost:8800/budget/reset · HTTP 200 · 0.0s · {"daily_usd": 1.0, "user_limit_per_min": 20, "max_question_chars": 500, "used_usd": 0, "remaining_usd": 1.0, "over": fal
    → request  POST http://localhost:8800/budget/reset
      {}
    ← response HTTP 200
      {
        "daily_usd": 1.0,
        "user_limit_per_min": 20,
        "max_question_chars": 500,
        "used_usd": 0,
        "remaining_usd": 1.0,
        "over": false
      }
✔ before: POST http://localhost:8800/usage · HTTP 200 · 0.0s · {"stored": 4, "total": 4}
    → request  POST http://localhost:8800/usage
      {
        "items": [
          {
            "request_id": "r1",
            "user": "이준호",
            "step": "answer",
            "model": "gpt-4.1-mini",
            "prompt_tokens": 1000,
            "completion_tokens": 100,
            "cost_usd": 0.00056,
            "route": "자동 답변"
          },
          {
            "request_id": "r1",
            "user": "이준호",
            "step": "classify",
            "model": "gpt-5.4-nano",
            "prompt_tokens": 100,
            "completion_tokens": 20,
            "cost_usd": 4.5e-05,
            "route": "자동 답변"
          },
          {
            "request_id": "r2",
            "user": "박서연",
            "step": "answer",
            "model": "gpt-4.1-mini",
            "prompt_tokens": 2000,
            "completion_tokens": 200,
            "cost_usd": 0.00112,
            "route": "자동 답변"
          },
          {
            "request_id": "r3",
            "user": "이준호",
            "step": "answer",
            "model": "gpt-4.1-mini",
            "prompt_tokens": 500,
            "completion_tokens": 40,
            "cost_usd": 0.000264,
            "route": "자동 답변"
          }
        ]
      }
    ← response HTTP 200
      {
        "stored": 4,
        "total": 4
      }
POST http://localhost:5678/webhook/my-cost-report · 5 case(s) × 1
✔ 모두 nano였다면 · 0.9s · $0.001989
    → request  POST /webhook/my-cost-report
      {
        "requests_per_day": 100,
        "workdays": 22,
        "what_if_model": "gpt-5.4-nano"
      }
    ← response HTTP 200
      {
        "requests": 3,
        "calls": 4,
        "cost_usd": 0.001989,
        "avg_usd": 0.000663,
        "by_model": {
          "gpt-4.1-mini": 0.001944,
          "gpt-5.4-nano": 4.5e-05
        },
        "top_user": "박서연",
        "projected_month_usd": 1.4586,
        "daily_budget_usd": 1,
        "remaining_usd": 0.998011,
        "over_budget": false,
        "what_if": {
          "model": "gpt-5.4-nano",
          "cost_usd": 0.00117,
          "saving_usd": 0.000819,
          "projected_month_usd": 0.858
        }
      }
✔ 원래 숫자는 그대로 · 0.1s · $0.001989
    → request  POST /webhook/my-cost-report
      {
        "requests_per_day": 100,
        "workdays": 22,
        "what_if_model": "gpt-5.4-nano"
      }
    ← response HTTP 200
      {
        "requests": 3,
        "calls": 4,
        "cost_usd": 0.001989,
        "avg_usd": 0.000663,
        "by_model": {
          "gpt-4.1-mini": 0.001944,
          "gpt-5.4-nano": 4.5e-05
        },
        "top_user": "박서연",
        "projected_month_usd": 1.4586,
        "daily_budget_usd": 1,
        "remaining_usd": 0.998011,
        "over_budget": false,
        "what_if": {
          "model": "gpt-5.4-nano",
          "cost_usd": 0.00117,
          "saving_usd": 0.000819,
          "projected_month_usd": 0.858
        }
      }
✔ 모두 mini였다면 · 아끼는 돈이 음수 · 0.0s · $0.001989
    → request  POST /webhook/my-cost-report
      {
        "what_if_model": "gpt-4.1-mini"
      }
    ← response HTTP 200
      {
        "requests": 3,
        "calls": 4,
        "cost_usd": 0.001989,
        "avg_usd": 0.000663,
        "by_model": {
          "gpt-4.1-mini": 0.001944,
          "gpt-5.4-nano": 4.5e-05
        },
        "top_user": "박서연",
        "projected_month_usd": 0.043758,
        "daily_budget_usd": 1,
        "remaining_usd": 0.998011,
        "over_budget": false,
        "what_if": {
          "model": "gpt-4.1-mini",
          "cost_usd": 0.002016,
          "saving_usd": -2.7e-05,
          "projected_month_usd": 0.044352
        }
      }
✔ 없는 모델은 400 · 0.2s
    → request  POST /webhook/my-cost-report
      {
        "what_if_model": "gpt-9"
      }
    ← response HTTP 400
      {
        "error": "unknown model",
        "model": "gpt-9",
        "known": [
          "gpt-4.1-mini",
          "gpt-5.4-nano"
        ]
      }
✔ what_if 없이 부르면 과제 1과 같음 · 0.0s · $0.001989
    → request  POST /webhook/my-cost-report
      {}
    ← response HTTP 200
      {
        "requests": 3,
        "calls": 4,
        "cost_usd": 0.001989,
        "avg_usd": 0.000663,
        "by_model": {
          "gpt-4.1-mini": 0.001944,
          "gpt-5.4-nano": 4.5e-05
        },
        "top_user": "박서연",
        "projected_month_usd": 0.043758,
        "daily_budget_usd": 1,
        "remaining_usd": 0.998011,
        "over_budget": false
      }
Passed 5/5
report: runs/lab03-challenge2-20261028-211231.json
✔ after: POST http://localhost:8800/budget/reset · HTTP 200 · 0.0s · {"daily_usd": 1.0, "user_limit_per_min": 20, "max_question_chars": 500, "used_usd": 0.001989, "remaining_usd": 0.998011,
    → request  POST http://localhost:8800/budget/reset
      {}
    ← response HTTP 200
      {
        "daily_usd": 1.0,
        "user_limit_per_min": 20,
        "max_question_chars": 500,
        "used_usd": 0.001989,
        "remaining_usd": 0.998011,
        "over": false
      }
✔ after: POST http://localhost:8800/usage-clear · HTTP 200 · 0.0s · {"cleared": 4}
    → request  POST http://localhost:8800/usage-clear
      {}
    ← response HTTP 200
      {
        "cleared": 4
      }

$ uv run tools/flow.py test cases/lab03-challenge.json
✔ before: POST http://localhost:8800/usage-clear · HTTP 200 · 0.0s · {"cleared": 0}
✔ before: POST http://localhost:8800/budget/reset · HTTP 200 · 0.0s · {"daily_usd": 1.0, "user_limit_per_min": 20, "max_question_chars": 500, "used_usd": 0, "remaining_usd": 1.0, "over": fal
✔ before: POST http://localhost:8800/usage · HTTP 200 · 0.0s · {"stored": 4, "total": 4}
POST http://localhost:5678/webhook/my-cost-report · 5 case(s) × 1
✔ 요약 숫자 · 0.1s · $0.001989
✔ 모델별 · 한 달 예상 · 0.1s · $0.001989
✔ 작은 모델 몫 · 0.1s · $0.001989
✔ 예산 남은 금액 · 0.0s · $0.001989
✔ before: POST http://localhost:8800/budget · HTTP 200 · 0.0s · {"daily_usd": 0.001, "user_limit_per_min": 20, "max_question_chars": 500, "used_usd": 0.001989, "remaining_usd": -0.0009
✔ 예산을 넘으면 · 0.0s · $0.001989
Passed 5/5
report: runs/lab03-challenge-20261028-211232.json
✔ after: POST http://localhost:8800/budget/reset · HTTP 200 · 0.0s · {"daily_usd": 1.0, "user_limit_per_min": 20, "max_question_chars": 500, "used_usd": 0.001989, "remaining_usd": 0.998011,
✔ after: POST http://localhost:8800/usage-clear · HTTP 200 · 0.0s · {"cleared": 4}

$ uv run tools/flow.py test cases/lab02-challenge.json
POST http://localhost:5678/webhook/my-cost · 7 case(s) × 1
✔ faq-vpn · LLM 한 번 · $0.0002 이하 · 1.7s · 자동 답변 · 1 call · $0.000156
✔ faq-password · LLM 한 번 · $0.0002 이하 · 1.4s · 자동 답변 · 1 call · $0.000136
✔ faq-printer · LLM 한 번 · $0.0002 이하 · 1.2s · 자동 답변 · 1 call · $0.000150
✔ faq-mail · LLM 한 번 · $0.0002 이하 · 1.4s · 자동 답변 · 1 call · $0.000166
✔ ticket-own · LLM 한 번 · $0.0002 이하 · 1.0s · 자동 답변 · 1 call · $0.000115
✔ ticket-done · LLM 한 번 · $0.0002 이하 · 1.1s · 자동 답변 · 1 call · $0.000108
✔ 규칙으로 모르는 질문은 분류 + 답 · 2.2s · 자동 답변 · 2 calls · $0.000097
Passed 7/7
report: runs/lab02-challenge-20261028-211242.json

$ uv run tools/flow.py call my-cost-report '{"requests_per_day": 1000, "what_if_model": "gpt-5.4-nano"}'
HTTP 200 · 0.1s
{
  "requests": 7,
  "calls": 8,
  "cost_usd": 0.000929,
  "avg_usd": 0.000133,
  "by_model": {
    "gpt-4.1-mini": 0.000904,
    "gpt-5.4-nano": 2.5e-05
  },
  "top_user": "이준호",
  "projected_month_usd": 2.920971,
  "daily_budget_usd": 1,
  "remaining_usd": 0.999071,
  "over_budget": false,
  "what_if": {
    "model": "gpt-5.4-nano",
    "cost_usd": 0.00061,
    "saving_usd": 0.00032,
    "projected_month_usd": 1.9162
  }
}

$ uv run tools/flow.py usage --clear
✔ usage cleared: {"cleared": 8}

$ uv run tools/flow.py budget --reset
✔ budget back to data/budget.json
budget $1.0 / used $0.000000 · remaining $1.000000 · over False · per user 20/min · question 500 chars

$ uv run tools/flow.py doctor
! n8n install folder /Users/mcchae/day65-n8n
   → day 65 SETUP-N8N 5단계 (get.n8n.io 설치). 다른 곳에 설치했다면 Last3Mon/65/n8n/.env 에 N8N_HOME=<폴더>
✔ n8n container day65-n8n-n8n-1
✔ n8n http://localhost:5678
✔ data API http://localhost:8800
✔ prices /prices · budget /budget (day 75 data API)
✔ n8n → http://data-api:8800
✔ credential 'OpenAI (.env)' (openAiCourse0001)
✔ node catalog (for check)
✔ CLI coding agent: codex, claude, agy
ready