event: message_start
data: {"type":"message_start","message":{"id":"msg_refuse","model":"claude-opus-4-7","usage":{"input_tokens":50,"output_tokens":0,"cache_creation_input_tokens":0,"cache_read_input_tokens":0}}}

event: message_delta
data: {"type":"message_delta","delta":{"stop_reason":"refusal"},"usage":{"output_tokens":0}}

event: message_stop
data: {"type":"message_stop"}

