foo.json

{
  "version": 1,
  "timestamp": "2026-02-25T13:06:32.962539+00:00",
  "task": "Create xvcl code to compute the MD5 hash of the User-Agent header",
  "model": "zai-org/GLM-5",
  "provider": "huggingface",
  "settings": {
    "temperature": 0.55,
    "top_p": 1.0,
    "seed": null,
    "max_turns": 100,
    "max_output_tokens": 32768,
    "context_length": null,
    "yolo": true,
    "allowed_commands": [],
    "skills_discovered": [
      "falco-overview",
      "fastlike-abi",
      "fastlike-backends",
      "fastlike-build",
      "fastlike-config",
      "fastlike-test",
      "fastly-auth",
      "fastly-cli",
      "fastly-compute",
      "fastly-compute-adapt",
      "fastly-compute-config",
      "fastly-compute-serve",
      "fastly-compute-test",
      "fastly-logging",
      "fastly-ngwaf",
      "fastly-services",
      "fastly-stats",
      "fastly-stores",
      "fastly-tls",
      "formatting-vcl",
      "linting-vcl",
      "run-fastlike",
      "simulating-vcl",
      "terraform-vcl",
      "testing-vcl",
      "vcl-console",
      "vcl-statistics",
      "xvcl-vcl"
    ],
    "instructions_loaded": [
      "AGENT.md"
    ]
  },
  "result": {
    "outcome": "success",
    "answer": "Done! I created `main.xvcl` which computes the MD5 hash of the User-Agent header using `digest.hash_md5(req.http.User-Agent)`.\n\n**Key points:**\n- The hash is computed in `vcl_recv` and stored in `req.http.X-User-Agent-MD5`\n- The hash is exposed in the response header `X-User-Agent-MD5` for demonstration\n- The compiled VCL is in `main.vcl`\n\n**Note:** MD5 is not cryptographically secure - use it only for checksums, cache keys, or non-security purposes. For security-sensitive applications, use `digest.hash_sha256()` instead.",
    "exit_code": 0
  },
  "stats": {
    "turns": 6,
    "tool_calls_total": 5,
    "tool_calls_succeeded": 5,
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      "write_file": {
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        "failed": 0
      },
      "run_command": {
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      }
    },
    "compactions": 0,
    "turn_drops": 0,
    "guardrail_interventions": 0,
    "truncated_responses": 0,
    "llm_calls": 6,
    "total_llm_time_s": 54.62,
    "total_tool_time_s": 0.632,
    "skills_used": [
      "xvcl-vcl"
    ]
  },
  "timeline": [
    {
      "turn": 1,
      "type": "llm_call",
      "duration_s": 7.836,
      "prompt_tokens_est": 4609,
      "finish_reason": "tool_calls",
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    },
    {
      "turn": 1,
      "type": "tool_call",
      "name": "use_skill",
      "arguments": {
        "name": "xvcl-vcl"
      },
      "succeeded": true,
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    {
      "turn": 2,
      "type": "llm_call",
      "duration_s": 7.313,
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    },
    {
      "turn": 2,
      "type": "tool_call",
      "name": "read_file",
      "arguments": {
        "file_path": "/Users/j/src/fastly-agent-skills/plugins/xvcl/skills/xvcl-vcl/references/crypto.md"
      },
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    {
      "turn": 3,
      "type": "llm_call",
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    {
      "turn": 3,
      "type": "tool_call",
      "name": "write_file",
      "arguments": {
        "file_path": "main.xvcl",
        "content": "# Compute MD5 hash of User-Agent header\n\nbackend origin {\n  .host = \"httpbin.org\";\n  .port = \"443\";\n  .ssl = true;\n}\n\nsub vcl_recv {\n  #FASTLY recv\n\n  declare local var.ua_hash STRING;\n\n  # Compute MD5 hash of User-Agent header\n  set var.ua_hash = digest.hash_md5(req.http.User-Agent);\n\n  # Store in request header for backend or logging\n  set req.http.X-User-Agent-MD5 = var.ua_hash;\n\n  set req.backend = origin;\n  return (lookup);\n}\n\nsub vcl_deliver {\n  #FASTLY deliver\n\n  # Expose the hash in response for demonstration\n  set resp.http.X-User-Agent-MD5 = req.http.X-User-Agent-MD5;\n\n  return (deliver);\n}\n"
      },
      "succeeded": true,
      "duration_s": 0.001,
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    },
    {
      "turn": 4,
      "type": "llm_call",
      "duration_s": 7.975,
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      "finish_reason": "tool_calls",
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    },
    {
      "turn": 4,
      "type": "tool_call",
      "name": "run_command",
      "arguments": {
        "command": "uvx xvcl main.xvcl -o main.vcl && falco lint main.vcl"
      },
      "succeeded": true,
      "duration_s": 0.628,
      "result_length": 144
    },
    {
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    {
      "turn": 5,
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      "arguments": {
        "file_path": "main.vcl"
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    {
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}