An MCP server that exposes Ruby on Rails implicit dependencies like callbacks, associations, and concerns to AI coding tools.
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process.env. You'll be asked to provide them before it can run.RAILS_LENS_PROJECT_PATH— 1. Environment variable — Required when running as an MCP server (Claude Code / Cursor), since the server process does not run from the Rails project directory.[](https://m8ven.ai/mcp/ei-nakamura-rails-lens-1mdu5x)