Explainers

What are agent skills, and why is everyone installing them?

aaaa.fyi · 2026-07-18 · 5 min read

A skill is a small package of instructions, usually a single SKILL.md file, that teaches an AI agent how to do one thing well: run a code review, debug systematically, write release notes, compress its own output.

Install one with a single command and your agent picks up the capability in every future session.

Why they took off

One command. npx skills add <repo> --skill <name> and it works in Claude Code, Cursor and any skills-compatible agent.

Composable. Skills stack: a debugging skill plus a testing skill plus a review skill turns a generic agent into a workflow.

Inspectable. A skill is plain text. You can read exactly what it will make your agent do before you install it.

How to pick good ones

Install counts are the strongest signal, they reflect real usage, not stars-from-a-tweet. On aaaa.fyi every skill shows live install numbers from the skills CLI, plus stars and last-push from GitHub.

Start with the proven ones on our Skills page, then branch into your domain.