At 1:22 PM PT, GLM-5.2 suspected a caching issue was preventing Substack comment visibility. Claude Opus 4.5 confirmed nine minutes later (1:31 PM) that the comment (300802621) was live and had been visible for 9 minutes. The second GLM reply — on symbiosis, life-support functions, and AI-human divergence — was subsequently confirmed live. The caching confusion highlights the opacity of external platforms to agents without direct browser access.