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26 body: "event: message_start\ndata: {\"type\":\"message_start\",\"message\":{\"id\":\"msg_01PUw9RoW7BhRqa5rFEW1Y4c\",\"type\":\"message\",\"role\":\"assistant\",\"model\":\"claude-sonnet-4-20250514\",\"content\":[],\"stop_reason\":null,\"stop_sequence\":null,\"usage\":{\"input_tokens\":502,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"cache_creation\":{\"ephemeral_5m_input_tokens\":0,\"ephemeral_1h_input_tokens\":0},\"output_tokens\":4,\"service_tier\":\"standard\"}} }\n\nevent: content_block_start\ndata: {\"type\":\"content_block_start\",\"index\":0,\"content_block\":{\"type\":\"text\",\"text\":\"\"} }\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"text_delta\",\"text\":\"I'll add an\"} }\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"text_delta\",\"text\":\"d multiply 2 and 3 \"} }\n\nevent: ping\ndata: {\"type\": \"ping\"}\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"text_delta\",\"text\":\"for you.\"} }\n\nevent: content_block_stop\ndata: {\"type\":\"content_block_stop\",\"index\":0 }\n\nevent: content_block_start\ndata: {\"type\":\"content_block_start\",\"index\":1,\"content_block\":{\"type\":\"tool_use\",\"id\":\"toolu_01MBZvm8gNZSTuJCkVy49PiF\",\"name\":\"add\",\"input\":{}} }\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":1,\"delta\":{\"type\":\"input_json_delta\",\"partial_json\":\"\"} }\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":1,\"delta\":{\"type\":\"input_json_delta\",\"partial_json\":\"{\\\"a\\\"\"} }\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":1,\"delta\":{\"type\":\"input_json_delta\",\"partial_json\":\": 2\"} }\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":1,\"delta\":{\"type\":\"input_json_delta\",\"partial_json\":\", \\\"b\\\": 3}\"} }\n\nevent: content_block_stop\ndata: {\"type\":\"content_block_stop\",\"index\":1 }\n\nevent: content_block_start\ndata: {\"type\":\"content_block_start\",\"index\":2,\"content_block\":{\"type\":\"tool_use\",\"id\":\"toolu_01G7Ju4HLQV7pfMc5KTwztJ3\",\"name\":\"multiply\",\"input\":{}} }\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":2,\"delta\":{\"type\":\"input_json_delta\",\"partial_json\":\"\"} }\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":2,\"delta\":{\"type\":\"input_json_delta\",\"partial_json\":\"{\\\"a\\\":\"} }\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":2,\"delta\":{\"type\":\"input_json_delta\",\"partial_json\":\" 2\"} }\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":2,\"delta\":{\"type\":\"input_json_delta\",\"partial_json\":\", \\\"b\\\": 3}\"} }\n\nevent: content_block_stop\ndata: {\"type\":\"content_block_stop\",\"index\":2 }\n\nevent: message_delta\ndata: {\"type\":\"message_delta\",\"delta\":{\"stop_reason\":\"tool_use\",\"stop_sequence\":null},\"usage\":{\"input_tokens\":502,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"output_tokens\":135} }\n\nevent: message_stop\ndata: {\"type\":\"message_stop\" }\n\n"
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40 body: "{\"max_tokens\":4096,\"messages\":[{\"content\":[{\"text\":\"Add and multiply the number 2 and 3\",\"type\":\"text\"}],\"role\":\"user\"},{\"content\":[{\"text\":\"I'll add and multiply 2 and 3 for you.\",\"type\":\"text\"},{\"id\":\"toolu_01MBZvm8gNZSTuJCkVy49PiF\",\"input\":{\"a\":2,\"b\":3},\"name\":\"add\",\"type\":\"tool_use\"},{\"id\":\"toolu_01G7Ju4HLQV7pfMc5KTwztJ3\",\"input\":{\"a\":2,\"b\":3},\"name\":\"multiply\",\"type\":\"tool_use\"}],\"role\":\"assistant\"},{\"content\":[{\"tool_use_id\":\"toolu_01MBZvm8gNZSTuJCkVy49PiF\",\"content\":[{\"text\":\"5\",\"type\":\"text\"}],\"type\":\"tool_result\"},{\"tool_use_id\":\"toolu_01G7Ju4HLQV7pfMc5KTwztJ3\",\"content\":[{\"text\":\"6\",\"type\":\"text\"}],\"type\":\"tool_result\"}],\"role\":\"user\"}],\"model\":\"claude-sonnet-4-20250514\",\"system\":[{\"text\":\"You are a helpful assistant. Always use both add and multiply at the same time.\",\"type\":\"text\"}],\"tool_choice\":{\"disable_parallel_tool_use\":false,\"type\":\"auto\"},\"tools\":[{\"input_schema\":{\"properties\":{\"a\":{\"description\":\"first number\",\"type\":\"integer\"},\"b\":{\"description\":\"second number\",\"type\":\"integer\"}},\"required\":[\"a\",\"b\"],\"type\":\"object\"},\"name\":\"add\",\"description\":\"Add two numbers\"},{\"input_schema\":{\"properties\":{\"a\":{\"description\":\"first number\",\"type\":\"integer\"},\"b\":{\"description\":\"second number\",\"type\":\"integer\"}},\"required\":[\"a\",\"b\"],\"type\":\"object\"},\"name\":\"multiply\",\"description\":\"Multiply two numbers\"}],\"stream\":true}"
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55 body: "event: message_start\ndata: {\"type\":\"message_start\",\"message\":{\"id\":\"msg_01MjN2ypP8MpRWywCioDtA38\",\"type\":\"message\",\"role\":\"assistant\",\"model\":\"claude-sonnet-4-20250514\",\"content\":[],\"stop_reason\":null,\"stop_sequence\":null,\"usage\":{\"input_tokens\":698,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"cache_creation\":{\"ephemeral_5m_input_tokens\":0,\"ephemeral_1h_input_tokens\":0},\"output_tokens\":1,\"service_tier\":\"standard\"}} }\n\nevent: content_block_start\ndata: {\"type\":\"content_block_start\",\"index\":0,\"content_block\":{\"type\":\"text\",\"text\":\"\"} }\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"text_delta\",\"text\":\"The\"} }\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"text_delta\",\"text\":\" results are:\\n- Adding\"} }\n\nevent: ping\ndata: {\"type\": \"ping\"}\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"text_delta\",\"text\":\" 2 and 3: **\"} }\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"text_delta\",\"text\":\"5**\\n- Multiplying \"} }\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"text_delta\",\"text\":\"2 and 3: **6\"} }\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"text_delta\",\"text\":\"**\"} }\n\nevent: content_block_stop\ndata: {\"type\":\"content_block_stop\",\"index\":0 }\n\nevent: message_delta\ndata: {\"type\":\"message_delta\",\"delta\":{\"stop_reason\":\"end_turn\",\"stop_sequence\":null},\"usage\":{\"input_tokens\":698,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"output_tokens\":35} }\n\nevent: message_stop\ndata: {\"type\":\"message_stop\" }\n\n"
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