An open recipe box for AI agent institutional knowledge

What it does Agent Skills is an open specification for extending AI agents by handing them folders of expertise. Each skill is a directory built around a SKILL.md file—metadata, instructions, and optional scripts or assets—that tells an agent how to handle a specific domain or workflow. Originally developed by Anthropic, the format is now an open standard adopted by a growing ecosystem of agent tools.

The interesting bit The format uses progressive disclosure: at startup an agent sees only a skill’s name and description, pulling the full instructions into context only when a task matches. That keeps the context window small while letting agents carry a large library of skills without bloat.

Key highlights

• Skills are plain folders with a SKILL.md core—no proprietary binary formats or APIs to wrestle with.
• Packages procedural knowledge, scripts, templates, and reference docs into version-controlled, portable units.
• Cross-product reuse: build a skill once and deploy it across any compatible agent.
• Open standard with ecosystem contributions; code is Apache 2.0 and docs are CC-BY-4.0.

Verdict Worth a look if you need repeatable, auditable agent expertise that travels across teams and tools. If your workflow is locked inside a single closed platform with its own plugin system, you probably don’t need another format.