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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 v2.1.227 10 Aug 2026

Toggling one MCP server refreshes only its skills

You'll notice

Useful3 Signal1

MCP

Toggling one MCP server no longer wipes every other server's cached skills.

What

Enabling or disabling an MCP server now invalidates the skills cached for that server specifically, instead of clearing a shared cache. Other servers' skills stay warm.

Details

Skill fetching remains behind the same MCP-skills check that previously guarded it, so nothing new is fetched where MCP skills are off.

Evidence

invalidateMcpSkillsForServer

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

See this entry in the whole of v2.1.227 →