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{"type":"stream_event","event":{"type":"content_block_delta","delta":{"type":"text_delta","text":"chunk-"}}}
{"type":"stream_event","event":{"type":"content_block_delta","delta":{"type":"text_delta","text":"two"}}}
{"type":"result","subtype":"success","is_error":false,"num_turns":1,"result":"chunk-two","session_id":"sess-partial-001","usage":{"input_tokens":1,"output_tokens":2,"cache_read_input_tokens":0,"cache_creation_input_tokens":0}}