{"model":"upstream-model","created_at":"2026-01-01T00:00:00Z","message":{"role":"assistant","content":"","thinking":"Let me think..."},"done":false}
{"model":"upstream-model","created_at":"2026-01-01T00:00:01Z","message":{"role":"assistant","content":"The answer is 42."},"done":false}
{"model":"upstream-model","created_at":"2026-01-01T00:00:02Z","message":{"role":"assistant","content":""},"done":true,"done_reason":"stop","total_duration":5000000000,"prompt_eval_count":10,"eval_count":50}
