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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 v2.1.224

MCP version mismatch is reported before it throws

Under the hood
Useful1 Signal1
MCP

MCP version mismatches are reported to telemetry before the same error is raised.

What

The check that the loaded MCP client module matches the MCP version Claude Code expects now reports the expected and observed versions to telemetry before raising the same error as before.

Evidence

MCP runtime accessor tripwire: resolved generation is v2 but the loaded client module does not carry MCP_TREE_ID v2

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 v2.1.224 →