AI agent — An AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.
agent skill — A reusable instruction file that teaches an agent how to do one job well — the procedure, the tools, and what counts as done.
context window — The maximum amount of text a model can consider at once — its working memory for the current conversation or task.
Why it matters
A checklist for judging agent skillA reusable instruction file that teaches an agent how to do one job well — the procedure, the tools, and what counts as done.Full definition → quality: model-invoked flexibility costs context windowThe maximum amount of text a model can consider at once — its working memory for the current conversation or task.Full definition → and predictability, reference material belongs behind pointers rather than in SKILL.md, and each step should carry more work than prose.
