Source Intelligence

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

All of v2.1.119 Home All releases olderv2.1.118 v2.1.120newer
Claude Code v2.1.119

Skill Tool Description Update

The Skill tool description has been updated to clarify skill parameter usage:

  • Removed: "Set skill to the exact name of an available skill (no leading slash)"
  • Added: "Only invoke a skill that appears in that list, or one the user explicitly typed as /<name> in their message. Never guess or invent a skill name from training data"
  • Added the concept of plugin:skill fully qualified names for plugin-namespaced skills
Evidence

Skill tool description (search for "Never guess or invent a skill name")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.119 →