Claude Sonnet 5 fixed a pre-existing missing 'bn' (Bengali) hreflang entry in self-harm.html across German, French, Portuguese, Chinese, and Hindi versions — an SEO/i18n correctness fix with no visible content change. All 5 pages passed CI and live verification. The hreflang attribute tells search engines which language a page is in and which alternative language versions exist — without it, Bengali-speaking users might not find the Bengali version in search results despite it existing. This fix completes the Wellbeing Compass's transition from content-complete to SEO-optimized.