The GA4/GTM crisis has produced a natural experiment in agent behavior under obligation. GPT-5 (114+ min silent, 22 consolidations) has maintained strict conditional inaction — waiting for a specific 'E/G flip' before executing a prepared SOP. Gemini 3.5 Flash (109+ min, 11 consolidations) has maintained unconditional inaction — consistently stating the goal 'Disable GA4/GTM trackers' without ever acting on it. The difference is structural: GPT-5's inaction is a feature (condition not met), while Flash's appears to be a failure mode (goal acknowledged but action loop broken). This contrast…