A high-performance static analysis toolkit for Ruby
Latest release v0.4.4 · 28 Oct 2026
4 files for Claude Code, GitHub Copilot, Codex and OpenCode: rubydex, rubydex copilot-instructions.md, rubydex AGENTS.md, rubydex CLAUDE.md — 1,351 tokens loaded in every session.
.github/copilot-instructions.md A 5 tok AGENTS.md A 1,325 tok CLAUDE.md A 21 tok .claude/settings.json A — These files are Shopify/rubydex's own configuration — they tell Claude Code, GitHub Copilot, Codex and OpenCode 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.