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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.

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Claude Code v2.1.219

Unused MCP skills are now called out separately

You'll notice
Useful2 Signal0
Skills

Unused MCP skills get their own line in the skill report with server-specific advice.

/mcp
What

The skill report no longer lumps every never-invoked skill together; MCP-provided skills get their own line with guidance specific to servers.

Details
  • Never-invoked skills are split into settings-owned, plugin-owned and MCP-owned groups.
  • The MCP line explains those skills live on the server rather than on disk, and that disabling the server in /mcp also removes its tools.
Evidence

MCP skills live on the server, not on disk

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 v2.1.219 →