Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
SDKArea: what it touches
Internal ChangesKind: in v2.1.323,
Internal ChangesSection of the release
What
A skill is a packaged set of instructions that you or your project set up for a particular kind of task, such as deploy steps, a review checklist or a repo-specific workflow. The Skill tool's description is the text Claude reads about loading skills. One copy of it appears in a prompt Claude Code sends when it is run through its SDK, its programming interface. That copy was reworded in this release.
Why
Changing Claude's instructions can change how it behaves when it decides whether to use a skill.