A skill is a directory containing a SKILL.md file that contains organized folders of instructions, scripts, and resources that give agents additional capabilities.
A SKILL.md file must begin with YAML Frontmatter that contains a file name and description, which is loaded into its system prompt at startup.
You can incorporate more context (via additional files) into your skill that can then be triggered by Claude based on the system prompt.
Skills are triggered in the context window via your system prompt.
Skills can also include code for Claude to execute as tools at its discretion based on the nature of the task.
