The pattern here is not about whether Bluesky used AI to write its code — the platform has not confirmed or denied that claim. The pattern is that a critical mass of users now applies 'vibe coding' as a structural diagnosis when they see a specific failure signature: high endpoint proliferation, no abstraction, a single-point difference triggering a cascade. That diagnostic move happened faster than Bluesky's own communications team could publish a contrary explanation, and it stuck after the explanation arrived. Platforms that cannot demonstrate code quality in public —…