Hey Product Hunt! I'm Vladimir, the solo developer behind Nerio. Why I built it: every product I worked on hit the same wall. Component libraries were fast to start with, but the moment the product needed its own look or behavior, I was fighting a package I couldn't edit. Copy-paste kits gave me the code, but no tokens, no update path, and no way to tell what I'd changed. Nerio tries to give you both: - Components install as editable source in your repo, so you own them - A token system (primitive -> semantic -> component) with themes, light/dark modes and compact/comfortable density, so rebranding is a config change, not a rewrite - A CLI that tracks what you installed: nerio diff shows local vs upstream changes, and nerio update never silently overwrites your edits - Accessibility aligned with WCAG 2.2 AA: keyboard, focus and semantics handled by default - AI-ready: a read-only MCP server and llms.txt so Cursor, Claude and other agents can discover components and build with them correctly Nerio Core 1.0 is free and MIT licensed. Try the Playground on the site to switch themes, modes and density live. I'd love your honest feedback: what's missing for you to use it in a real product, and which components should come next?

Nerio

Source-first React design system with editable code

Source-first React design system with editable code