return[]byte(`{"model":"claude-sonnet-4-5","stream":true,"max_tokens":4096,"metadata":{"user_id":"user-abc123"},"thinking":{"type":"enabled","budget_tokens":2048},"system":"You are a helpful assistant.","messages":[{"role":"user","content":"What is the meaning of life?"},{"role":"assistant","content":"The meaning of life is a philosophical question."},{"role":"user","content":"Can you elaborate?"}]}`)
b.WriteString(`{"model":"claude-sonnet-4-5","stream":true,"max_tokens":8192,"metadata":{"user_id":"user-xyz789"},"system":[{"type":"text","text":"You are a detailed assistant.","cache_control":{"type":"ephemeral"}}],"messages":[`)
msgCount:=200
fori:=0;i<msgCount;i++{
ifi>0{
b.WriteByte(',')
}
ifi%2==0{
b.WriteString(fmt.Sprintf(`{"role":"user","content":"This is user message number %d with some extra padding text to make the message reasonably long for benchmarking purposes. Lorem ipsum dolor sit amet."}`,i))
}else{
b.WriteString(fmt.Sprintf(`{"role":"assistant","content":[{"type":"text","text":"This is assistant response number %d. I will provide a detailed answer with multiple sentences to simulate real conversation content for benchmark testing."}]}`,i))