A lightweight collaborative doc editor built with TipTap + Yjs on the frontend and PartyServer (Cloudflare Durable Objects) on the backend; inspired by the collaboration flow of Excalidraw.

Always sync + Full GFM support + File import/export

• Real-time collaboration with CRDTs: Yjs handles conflict-free edits and presence (multi-cursor) across tabs and users.
• Offline-first UX: documents persist locally via IndexedDB and become editable after local state sync completes.
• Edge-native backend: collaboration server runs on Cloudflare Workers + Durable Objects, with persistence to Cloudflare D1 via Drizzle ORM.
• Modern TypeScript stack: React 19, TanStack Start/Router, Vite, and end-to-end type-safe patterns.
• Production-minded tooling: Biome for lint/format, Zod for runtime validation, and shadcn/ui components.

• Rich-text editing (headings, lists, code blocks, blockquotes, text alignment, highlight, etc.)
• Markdown import (.md) with confirmation dialog
• Export to Markdown (.md) and HTML (.html)
• “Share link” collaboration sessions (/?room=...) with presence avatars and colored carets
• Solo mode still supports cross-tab sync and local persistence

To run this application:

pnpm install
npx wrangler d1 migrations apply light-doc-db --local
pnpm dev

To build this application for production:

pnpm build

This project uses Vitest for testing. You can run the tests with:

pnpm test

This project uses Tailwind CSS for styling.

This project uses Biome for linting and formatting. The following scripts are available:

pnpm lint
pnpm format
pnpm check