Skill Claude CodeCodex
Harvests offline documentation (README, CHANGELOG, public API) for every gem in a Ruby/Rails project's Gemfile.lock into a local cache, tracks gem versions in a manifest, and refreshes only gems whose version changed. Then reviews a git diff or pull request against that cache to surface (a) gem-upgrade impact …
MCP server Claude CodeCodexCursor +2
Lets the agent work with GitHub: search code, read and create issues and pull requests, and manage repositories through the GitHub API. Runs locally from the @modelcontextprotocol/server-github npm package. Needs 1 environment variable to run.
Instructions file
Instructions for VSN2015/concerns_on_rails, covering claude.md, commands, run a single spec file, run a single example by line number and build the gem.