Agent Skills is a way to separate expertise ("how we do this task") from the model and the tool. A skill is a directory with a `SKILL.md` file: YAML metadata (name, description) and the instructions in the body, plus helper scripts if needed. The agent keeps the skill description in context and reads it in full when the task requires it.
What matters most for business is freedom from lock-in. The standard is open (agentskills.io), is not tied to Anthropic, and the same skill written for Codex works unchanged in Claude Code, Cursor, GitHub Copilot, and dozens of other platforms. This turns accumulated expertise into a portable asset, not dependence on a single vendor.
