Rails Hyperdrive — AI skill for Claude Code

Rails Hyperdrive

**Live introspection and stack-matched knowledge for AI coding agents, straight from your Rails app.**

[](https://rubygems.org/gems/rails-hyperdrive) [](https://github.com/rails-hyperdrive/rails-hyperdrive/actions/workflows/ci.yml) [](LICENSE.txt)

Rails Hyperdrive is a development-only Rails engine for working on Rails apps with AI coding agents. It gives the agent two things it can't get from source alone: live answers from the booted app, and guidance specific to the gems and versions in the bundle.

• Live introspection. The engine mounts an MCP (Model Context Protocol) server at http://localhost:3000/_hyperdrive/mcp with 8 tools that answer from the running app itself: eval Ruby, query the DB (read-only), tail logs, list models and routes, jump to source, look up docs, snapshot the stack. The agent asks the router instead of grepping routes.rb, and reads the live schema instead of replaying migrations.
• Stack-specific knowledge. bin/rails hyperdrive:init discovers skills, guidelines, agents, and commands shipped by companion gems and installs only the ones matching your Gemfile: guidance targeting Sidekiq, for example, lands only if your app bundles Sidekiq, at a version the guidance covers.

**rails-hyperdrive is the mechanism; companion gems are the content.** The gem itself ships no skills or guidelines, only the contract and the discovery/install engine. Content reaches your app three ways:

• Native support: the library gem itself ships a top-level skills/ directory in the [skills.sh](https://www.