Cohesion – Minimal Real‑Time Next.js

Features:

• WebSocket chat (room main)
• Collaborative (last-writer-wins) code editor
• Peer‑to‑peer WebRTC video call (signaling via same WebSocket)
• Run C++ snippets via a simple API wrapper over Piston (POST /api/compile)

Minimal file count, inline comments, only free STUN (Google) – no external paid APIs.

Run

npm install
npm run dev

Open two browser windows: http://localhost:3000 to test collaboration.

To run C++:

• Switch to the Code tab, paste C++ code, optionally add stdin, and click "Run C++".
• Server calls Piston's execute API and returns stdout/stderr.

Key Files

• server.ts – Next + WebSocket server (/ws-node endpoint)
• src/app/page.tsx – Single-page UI & client logic (auto reconnect + endpoint fallback)
• src/app/api/compile/route.ts – C++ execute endpoint using Piston

Limitations

• In-memory volatile state (refresh clears)
• Naive whole-document code sync
• No TURN server (NAT may block media)
• No auth (all share one room)
• C++ runner is external (Piston); add auth/rate limits before exposing publicly

Add auth, DB persistence (Postgres + Prisma), CRDT (Yjs), and TURN for reliability.

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