Audit and implement instant, zero-delay navigation in Next.js App Router applications — securely. Use this skill whenever the user asks about navigation performance, slow page transitions, prefetching not working, Router Cache setup, skeleton loading, Partial Prerendering (PPR), caching strategy, or cross-user data leakage risks. Trigger on phrases like "my navigation is slow", "audit my Next.js routing", "implement instant navigation", "prefetching not working", "check my caching", "how do I use loading.tsx", "PPR setup", "navigation feels sluggish", "back button re-fetches", "skeleton screen", or any request to diagnose or improve Next.js navigation. Also trigger proactively when the user shares Next.js layout/page/config code and there's any hint of performance or caching concern — even casual phrasing like "why is my site slow" or "transitions don't feel instant".
2026-06-23