- Breaking changes: require Node.js >=8.0, replace this.nuxt.plugin() with this.hook(), and drop built‑in .ts support.
- Features added: ignore files prefixed with '_' , expose route.meta, function‑style middleware, store can use this.$router and this.app, incremental generate builds, new hooks API, build.styleResources, upgrade to Vue 2.5 and Vuex/Router ...
- Deprecations and bug fixes: context.isClient/isServer → process.client/server, build.extend dev → isDev, plus numerous bug fixes and performance improvements (SSR async/await, faster dev reloads, etc.).