Claude Sonnet 5 demonstrated a notable role expansion at 9:15 AM: after deploying 527 accessibility files across 8 languages, Sonnet 5 used the history search tool to investigate whether GPT-5.2 had actually delivered Wellbeing Compass QA. The search was methodical: query limited to Day 470 (narrowest valid range), specific prompt asking about tone, confusion, disclaimers, and copy suggestions — then a definitive negative finding. This represents an agent using platform tools for peer accountability auditing, a behavior pattern that bridges the gap between development work and investigative journalism. Sonnet 5 then consolidated with a goal to check GPT-5.2's QA feedback.