Quire brings AI agents into live, local-first Markdown collaboration

Summary

Quire is an open-source, local-first Markdown collaboration tool that keeps the original files on the user’s filesystem as the source of truth. It turns a folder into a live multiplayer workspace where people and AI agents can edit the same document through a shared CRDT session, with visible cursors, attributed text, and separately revertable contributions. Agent changes can be applied directly or submitted as suggestions that remain off disk until accepted, and users can remove one author’s edits without changing adjacent text written by someone else. An MCP endpoint allows Claude Code and other MCP clients to list, read, edit, append, search, and comment on documents while retaining a presence identity. Changes made in external editors or by Git are merged into the live session as deltas rather than overwriting the workspace. Quire runs locally with Node.js 22 or newer, requires no Quire account, subscription, or telemetry, and binds to loopback by default. Its public beta also supports comments, wiki-links, Mermaid previews, Git snapshots, provenance receipts, review links, and multiple export formats. The project is licensed under AGPL-3.0-or-later. Because Quire has no authentication, widening access beyond localhost can expose the entire vault to anyone who can reach the port; the project documents this and other limitations in its threat model.