forked from bchanot/claude
Bastien Chanot
4ea2fb8c37
seo-analyzer.md:278 listed "VSI (Visual Stability Index) — new 2026 signal, Google Core Web Vitals 2.0" as a threshold, stated as fact, no hedge, in client-facing audits. It does not exist. Verified against two primary sources: - developer.chrome.com/docs/crux/api — complete metric list carries no visual_stability_index. Blogs claimed "Google is actively collecting VSI through CrUX": flatly false. - web.dev/articles/vitals — three stable CWV (LCP, INP, CLS). No VSI, no "Core Web Vitals 2.0". Thresholds change with prior notice on an annual cadence. Ten SEO blogs cross-cited each other into an apparent consensus. WebSearch returns that consensus, which is why the resources README rule "agents MUST cross-check via WebSearch on FULL" did not catch it — that mitigation launders blog misinformation into apparent verification. Fix removes the metric and states the sourcing rule where a future rumour would land: primary sources only (web.dev / Chromium blog / CrUX API list, the last being decisive — a metric CrUX cannot return is one we cannot score). Incident documented inline so it is not re-added. Verified: make test 35 GREEN / 0 RED.