Diagram

diagram plugin

This directory is the shared installable plugin root used by the Codex and Claude Code marketplace flows.

Codex reads .codex.mcp.json through .codex-plugin/plugin.json; Claude Code reads .mcp.json through .claude-plugin/plugin.json.

Local test flow

1. Build the runtime:

   git clone https://github.com/zenuml/diagram.git
   cd diagram
   pnpm install
   pnpm package
   

2. For Codex, make sure plugin support is enabled in your Codex config:

   [features]
   plugins = true
   

3. Start or restart Codex in this repo:

   codex -C .
   

4. Run /plugins inside Codex CLI, then install diagram from the list.

5. If the install does not refresh immediately, start a fresh Codex session:

   codex -C .
   

6. If Codex still starts an older installed copy, clear the local plugin cache and reinstall:

   pnpm reset:codex-plugin-cache
   codex -C .
   

For Claude Code, add the repository marketplace with claude plugin marketplace add ./, then install diagram@diagram.

The plugin should then contribute the Diagramly.ai MCP tools, the packaged local draw CLI, and the draw skill.