m3e-canvas took 3,005 stars in three days by making the sketch step of vibe coding a real tool
GitHub·medium signal
Created 2026-09-02 and still being pushed to on 09-05, this MIT Next.js 16 / React 19 app lets you sketch Material 3 Expressive screens in the browser, link them, tap through the prototype, then copy out a prompt for your AI coding tool. It is a bet that the bottleneck in AI-assisted UI work is the ambiguous spec rather than the code generation, and the star velocity suggests the bet resonated. There is a live demo at lnkiai.github.io/m3e-canvas.