
Free, open-source diagrams you and your agent edit together
A free, open-source diagram canvas: MIT, local-first, no account, in your browser. One canvas, five ways in. Draw it. Write it as code, or paste Mermaid, D2 or Structurizr. Ask any of 10 AI providers, or a local model. Hand it to your coding agent: Claude Code edits the canvas you have open, live, over MCP. Or pull it from a GitHub repo, every arrow citing its file and line. The CLI checks drift in CI, so diagrams keep up with your code.
OpenFlowKit 2 is a free, open-source diagramming tool that allows collaborative editing in a browser without requiring an account. It supports multiple input methods, integrates with AI providers, and maintains synchronization with code through GitHub and CI checks.
A source that found nothing is a measurement. A source that has not run is a gap. Neither means the launch lacks the thing.