Rails MCP server: stop AI coding agents from guessing your app. A Ruby gem with 35 read-only tools that give Claude Code, Cursor, GitHub Copilot, OpenCode and Codex CLI your real schema, models, routes, controllers and views. MCP or CLI, Gemfile or standalone, and it still answers when the app can't boot.
Latest release v5.39.1 · 31 Oct 2026
2 files for Codex, OpenCode and Claude Code: rails-ai-context AGENTS.md, rails-ai-context CLAUDE.md — 158 tokens loaded in every session.
AGENTS.md A 135 tok CLAUDE.md A 23 tok These files are crisnahine/rails-ai-context's own configuration — they tell Codex, OpenCode 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.