A framework for production microfrontend architectures where every MFE can run a different framework — React, Svelte, Vue, Angular, Lit — while the system stays coherent at runtime.

MFKit ships as a monorepo of packages. @mfkit/plugin-api is the stable TypeScript contract every layer implements. @mfkit/kit holds the runtime, Vite config generation, self-healing primitives, and the MFKitOutlet component. @mfkit/codemods handles upgrades, create-mfkit scaffolds new work, and per-framework template packages supply the starting points.

Five principles hold the design together. Convention with smart inference rather than enforcement — detect, propose, apply. Every layer pluggable, with the plugin API locked so everything behind it can iterate freely. Self-healing at runtime: boundaries, retries, quarantine, last-known-good cache. Templates as first-class objects, reusable and versioned, resolvable from npm, git, or a local path. And AI tooling as tier-1, with skills, agents, and MCPs shipping alongside the scaffold.

Module Federation solves loading, not operating. The hard parts are what happens when one team's MFE breaks in production, when frameworks diverge, and when a new team needs to stand up an MFE without reverse-engineering the shell. MFKit is the layer that handles those.

Currently alpha, Phase 1 — the plugin API is unstable until v0.1. MIT licensed, Node 20 or newer, pnpm 10 or newer.