I built TeXlyre, an open-source collaborative editor for LaTeX and Typst that works entirely locally-first. No data leaves your device unless you explicitly share it.

The main pain point I wanted to solve: existing solutions like Overleaf require sending your documents to their servers, and local editors don't handle real-time collaboration well. TeXlyre uses CRDTs for conflict-free collaboration while keeping everything on your machine.

Key features: - Works offline by default - Real-time collaboration via WebRTC (peer-to-peer) - Support for both LaTeX and Typst - Your data stays on your device - Open source

The architecture uses local-first principles - documents are stored in your browser's storage and synced directly between peers when collaborating. No central server sees your content.

Still early but functional. Would love feedback from the HN community, especially around the collaboration UX and any edge cases I haven't considered.

GitHub: https://github.com/texlyre/texlyre

Demo: https://texlyre.github.io