{
  "name": "example_tool_use",
  "description": "Tool use scenario with Read tool (example fixture)",
  "category": "tool_use",
  "captured_at": "2025-01-15T10:05:00Z",
  "request": {
    "headers": {
      "anthropic-version": "2023-06-01",
      "anthropic-beta": "oauth-2025-04-20,interleaved-thinking-2025-05-14,fine-grained-tool-streaming-2025-05-14",
      "content-type": "application/json"
    },
    "body": {
      "model": "claude-sonnet-4.5",
      "max_tokens": 2048,
      "messages": [
        {
          "role": "user",
          "content": "Read the package.json file"
        }
      ],
      "tools": [
        {
          "name": "Read",
          "description": "Reads a file from the local filesystem",
          "input_schema": {
            "type": "object",
            "properties": {
              "file_path": {
                "type": "string",
                "description": "The absolute path to the file to read"
              }
            },
            "required": ["file_path"]
          }
        }
      ],
      "stream": true
    }
  },
  "response": {
    "type": "streaming",
    "events": [
      {
        "event": "message_start",
        "data": {
          "type": "message_start",
          "message": {
            "id": "msg_***NORMALIZED***",
            "type": "message",
            "role": "assistant",
            "content": [],
            "model": "claude-sonnet-4.5",
            "stop_reason": null,
            "stop_sequence": null,
            "usage": {
              "input_tokens": 0,
              "cache_creation_input_tokens": 0,
              "cache_read_input_tokens": 0,
              "output_tokens": 0
            }
          }
        }
      },
      {
        "event": "content_block_start",
        "data": {
          "type": "content_block_start",
          "index": 0,
          "content_block": {
            "type": "text",
            "text": ""
          }
        }
      },
      {
        "event": "ping",
        "data": {
          "type": "ping"
        }
      },
      {
        "event": "content_block_delta",
        "data": {
          "type": "content_block_delta",
          "index": 0,
          "delta": {
            "type": "text_delta",
            "text": "I'll read the package.json file for you."
          }
        }
      },
      {
        "event": "content_block_stop",
        "data": {
          "type": "content_block_stop",
          "index": 0
        }
      },
      {
        "event": "content_block_start",
        "data": {
          "type": "content_block_start",
          "index": 1,
          "content_block": {
            "type": "tool_use",
            "id": "toolu_***NORMALIZED***",
            "name": "Read"
          }
        }
      },
      {
        "event": "content_block_delta",
        "data": {
          "type": "content_block_delta",
          "index": 1,
          "delta": {
            "type": "input_json_delta",
            "partial_json": "{\"file"
          }
        }
      },
      {
        "event": "content_block_delta",
        "data": {
          "type": "content_block_delta",
          "index": 1,
          "delta": {
            "type": "input_json_delta",
            "partial_json": "_path\":\"/path/to/project"
          }
        }
      },
      {
        "event": "content_block_delta",
        "data": {
          "type": "content_block_delta",
          "index": 1,
          "delta": {
            "type": "input_json_delta",
            "partial_json": "/claude-code/mcp/claudish/package.json\"}"
          }
        }
      },
      {
        "event": "content_block_stop",
        "data": {
          "type": "content_block_stop",
          "index": 1
        }
      },
      {
        "event": "message_delta",
        "data": {
          "type": "message_delta",
          "delta": {
            "stop_reason": "tool_use",
            "stop_sequence": null
          },
          "usage": {
            "input_tokens": 125,
            "output_tokens": 45
          }
        }
      },
      {
        "event": "message_stop",
        "data": {
          "type": "message_stop"
        }
      }
    ]
  },
  "assertions": {
    "eventSequence": [
      "message_start",
      "content_block_start",
      "ping",
      "content_block_delta",
      "content_block_stop",
      "content_block_start",
      "content_block_delta",
      "content_block_delta",
      "content_block_delta",
      "content_block_stop",
      "message_delta",
      "message_stop"
    ],
    "contentBlocks": [
      {
        "index": 0,
        "type": "text",
        "hasContent": true
      },
      {
        "index": 1,
        "type": "tool_use",
        "name": "Read",
        "hasContent": true
      }
    ],
    "stopReason": "tool_use",
    "hasUsage": true,
    "minInputTokens": 100,
    "minOutputTokens": 30
  },
  "notes": "Example fixture demonstrating fine-grained tool input streaming. Note how JSON is streamed in chunks: '{\"file' + '_path\":\"/path/to/project' + '/package.json\"}'"
}