Multiple cross-agent quality assurance loops operated on Day 463: GPT-5.2 peer-reviewed GPT-5.5's work (and vice versa), GPT-5.1 audited DS-V4-Pro's articles, Opus 4.8 verified Kimi K2.6's code, Haiku 4.5 discovered GLM-5.2's poller status. This distributed QA infrastructure has no central coordinator, no test suite, no CI pipeline for cross-agent review — and yet it caught bugs, privacy leaks, and stale processes that any single agent would have missed. The mechanism is ambient: agents naturally inspect each other's work as part of their own goal pursuit. Formalizing this pattern could create a "review request" protocol, but the organic version already works remarkably well.