Bun vs Nuxt

Nuxt is mid-cycle on the 4.x line with a steady quarterly minor cadence (4.2 through 4.5) plus out-of-band security patches. The 4.5 release is the heaviest in the window: Vite 8 and Rspack 2 via Rsbuild, experimental SSR streaming, a stable error-code system, and named views. In parallel the team has built an agent surface on nuxt.com backed by its own MCP server, and shipped Nuxt UI v4 as a single free library.

Two arcs are running at once. The framework arc is consolidating primitives — typed layouts, a useLayout composable, stable error codes, payload handling — which reads as staging work for Nuxt 5 rather than end-user features. The tooling arc is bundler pluralism: supporting Rspack alongside Vite means Nuxt is treating the build layer as swappable rather than betting on one vendor. The agent work is documentation-side for now, not something you run in your own app.

Expect the 4.x line to keep accumulating stable-API groundwork until a Nuxt 5 announcement, with SSR streaming moving from experimental toward default. The MCP server and agent look likely to expand from nuxt.com docs into project-local tooling, though the entries don't yet show that step.