Prefer skills that change the default over skills you must remember to invoke
Practice
The practice
The test for any agent skill: does it change what the agent produces without constant prompting, or does it just add a command to a menu? Frontend-design changes what a landing-page request returns; a review skill that runs before output changes every result. Those clear the bar.
2026-10-09
The SKILL.md format is portable across Claude Code, Cursor, Gemini CLI, Codex CLI and others, so a skill written once travels. Official ones install with npx skills add anthropics/claude-code --skill name; npx skills list shows what is installed.
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