Free, open-source ERD designer for browser, VS Code & Google Drive — with AI agent integration (MCP / Claude Code plugin). DDL export for 7 databases.
Latest release github-page/2026/10/v0.261024.215915 — v0.261024.215915 · 24 Oct 2026
3 files for GitHub Copilot and Claude Code: erd-designer copilot-instructions.md, erd-designer testing.instructions.md, erd-designer CLAUDE.md — 312 tokens loaded in every session.
.github/copilot-instructions.md A 41 tok .github/instructions/testing.instructions.md A 192 tok CLAUDE.md A 79 tok These files are kajitiluna/erd-designer's own configuration — they tell GitHub Copilot and Claude Code how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.