event: message_start
data: {"type":"message_start","message":{"id":"msg_disc","model":"claude-opus-4-7","usage":{"input_tokens":12,"output_tokens":0,"cache_creation_input_tokens":0,"cache_read_input_tokens":0}}}

event: content_block_start
data: {"type":"content_block_start","index":0,"content_block":{"type":"tool_use","id":"toolu_DISC","name":"search","input":{}}}

event: content_block_delta
data: {"type":"content_block_delta","index":0,"delta":{"type":"input_json_delta","partial_json":"{\"que"}}

event: content_block_delta
data: {"type":"content_block_delta","index":0,"delta":{"type":"input_json_delta","partial_json":"ry\":"}}
