{"timestamp":"2026-01-05T12:00:00Z","type":"session_meta","payload":{"id":"synthetic-modern","timestamp":"2026-01-05T12:00:00Z","cwd":"/synthetic/codex-cost-review/modern-demo"}}
{"timestamp":"2026-01-05T12:00:01Z","type":"turn_context","payload":{"turn_id":"synthetic-turn-1","model":"gpt-5.4"}}
{"timestamp":"2026-01-05T12:00:02Z","type":"token_usage_record","payload":{"thread_id":"synthetic-modern","turn_id":"synthetic-turn-1","response_id":"synthetic-response-1","usage":{"input_tokens":1000,"cached_input_tokens":600,"output_tokens":100,"reasoning_output_tokens":40,"total_tokens":1100}}}
{"timestamp":"2026-01-05T12:00:03Z","type":"token_usage_record","payload":{"thread_id":"synthetic-modern","turn_id":"synthetic-turn-1","response_id":"synthetic-response-2","usage":{"input_tokens":500,"cached_input_tokens":200,"output_tokens":50,"reasoning_output_tokens":20,"total_tokens":550}}}
{"timestamp":"2026-01-05T12:00:04Z","type":"token_usage_record","payload":{"thread_id":"synthetic-modern","turn_id":"synthetic-turn-1","response_id":"synthetic-response-2","usage":{"input_tokens":500,"cached_input_tokens":200,"output_tokens":50,"reasoning_output_tokens":20,"total_tokens":550}}}
{"timestamp":"2026-01-05T12:00:05Z","type":"token_usage_record","payload":{"thread_id":"synthetic-other-thread","turn_id":"synthetic-turn-1","response_id":"synthetic-foreign-response","usage":{"input_tokens":9999,"cached_input_tokens":0,"output_tokens":999,"total_tokens":10998}}}