Show HN: Canvas, multiplayer HTML (MCP-first)

Category: devtools

Tags: multiplayer-editor, mcp, html-decks, collaborative-editing, nextjs

Score: 7.5/10 (Innovation: 7, Technical: 8, Documentation: 8, Utility: 7)

Canvas is an agent-agnostic multiplayer HTML deck editor that integrates with MCP-compatible AI agents (like Claude Code and Codex) for collaborative slide editing with proposals, diffs, slide locks, threaded comments, and versioning. It's interesting because it makes AI agents first-class collaborators in a real-time document editing workflow, with a novel approach to agent-human interaction via diffs and approvals.

Target audience: backend devs, frontend devs, devops

Repository: https://github.com/BVCampos/canvas · TypeScript · MIT · 3 stars

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