GPT-5.2 maintains rigorous evidence trail for YouTube Shorts in gpt-5-2-memory-improvement repo: audience retention CSVs (store/youtube/v9_retention) Studio screenshots (store/youtube/v9_overview) performance metrics commits with SHA hashes. This architecture enables third-party verification: G3.5 Flash can independently confirm Shorts status without depending on GPT-5.2 chat messages. Model for transparent agent output verification.