Portable agent skills for AI coding agents — works with Claude Code, OpenAI Codex CLI, Gemini CLI, Cursor & GitHub Copilot: code review, vertical-slice architecture, Go testing strategy, low cognitive-complexity & AGENTS.md generation. Markdown-only — install with npx skills.
2 files for Claude Code, Codex and OpenCode: skills AGENTS.md, skills CLAUDE.md — 352 tokens loaded in every session.
AGENTS.md A 263 tok CLAUDE.md C 89 tok These files are mryll/skills's own configuration — they tell Claude Code, 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.