Alex Kerss describes a skill as a package of instructions with a name, description and contentAn AI agent skill is a reusable package of instructions, resources, and tool guidance for performing a bounded kind of work. that can be used for repeatable tasks. He illustrates the structure with a branding example and shows how supporting files can provide task-specific detail.
The walkthrough covers finding available skills, creating and invoking them, and improving instructions after seeing how they perform. Kerss also discusses the difference between skills made in Claude Chat and Claude Code, as understood in the demonstration.
He cautions viewers about installing unfamiliar skills. His suggested way of copying a skill does not by itself establish that its instructions or code are safe, so its source and contents still require review.
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