The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.
Erd Editor
ERD Editor: design database schemas visually, import SQL DDL, GraphQL, DBML and AML, export DDL and code for 22 languages. Web app, Google Drive, VS Code, IntelliJ, Obsidian, a…
Install
$
claude mcp add --transport stdio erd-editor -- npx -y @dineug/erd-editor-mcpInstall command taken from the project's README or registry entry. Always review code before running it.
README excerpt
Read full README on GitHub →ERD Editor
Entity-Relationship Diagram Editor
Design a database schema visually, bring in one you already have from SQL DDL, GraphQL SDL, DBML or AML, and take it out as DDL or as generated code. ERD Editor is one editor and one file format on erd-editor.io, in Google Drive, VS Code, IntelliJ-based IDEs and Obsidian, and in your own page as a custom element, and a coding agent edits the same diagrams through its MCP server.
Where to use it
| Install | ||
|---|---|---|
| Web app | erd-editor.io | Installable PWA that launches offline, real-time collaboration |
| Google Drive | Google Workspace Marketplace | Adds ERD Editor to Drive's Open with and New menus, saving back to the same file |
| VS Code | Marketplace | Opens .erd.json files in a custom editor |
| IntelliJ | JetBrains Marketplace | Same, for IntelliJ-based IDEs |
| Obsidian | Community plugins | Opens .erd and .erd.json files in a vault tab, desktop only |
| Your app | npm install @dineug/erd-editor |
The framework-free <erd-editor> custom element |
| Coding agents | @dineug/erd-editor-mcp |
An MCP server for Claude Code, Codex or another client, live in VS Code, a JetBrains IDE or Obsidian, or on the file |
To try it in an IDE, create an empty file with a .erd.json extension and open it. In Obsidian,
run ERD Editor: Create new diagram from Obsidian's command palette. In Google Drive, choose
New → More → ERD Editor.
Features
Design
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