- Added Nuxt 4 compatibility testing flag, experimental multi‑app support, auto‑registration of /layers, and new <NuxtRouteAnnouncer> accessibility component.
- Implemented performance upgrades (module deduplication, faster Vite dev server start, chunk determinism, tree‑shaking client‑only composables) and DX improvements (serialized dev logs, clearer runtimeConfig errors).
- Provided new module author APIs (typed module options, builder compatibility, onPrehydrate hook, runtime config utilities) and deprecated `process.flags`.
v3.12.0
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Fix island payload serialization for underscore keys and deduplicate island renders during prerender
Improved build and runtime performance with lazy imports, reused scans, and skipping unchanged files across Nuxt, Kit, and Vite.
Security release addressing server‑side RCE, unauthorized component instantiation, route rule authorization bypass, DoS, and dev server path disclosure, plus a regression fix from the prior advisory.