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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 v2.1.221

MCP teardown handles cached clients, not just connected ones

Under the hood
Useful2 Signal0
MCP

Cached MCP server connections are now cleaned up properly instead of being skipped.

What

Cleanup paths that previously ignored cache-backed clients now run against them too, so cached server state is properly cleared.

Details
  • The three disconnect/cleanup paths in the MCP store moved from type === "connected" checks to a helper matching e.type === "connected" || e.type === "cached".
  • clearServerCache now runs for cached entries as well.
  • Entries that match neither type are skipped early.
Evidence

clearServerCache

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

See this entry in the whole of v2.1.221 →