- In short
- A Skill encodes a repeatable, multi-step procedure that Claude should follow consistently for a task type. Skills live at the account level under Customize, not inside any single Project, so a Skill built once is available to every Project that needs it. This is what distinguishes a Skill from a standing instruction: an instruction is a single behavioral rule scoped to one Project, while a Skill is a reusable procedure shared across all of them.
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