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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 v2.1.242

Eval runs fail loudly when managed policy blocks the mock servers

You'll notice
Useful2 Signal2
Plugin Eval

Eval runs stop with a clear policy error when your org's MCP rules block the mock servers.

allowedMcpServersdeniedMcpServers--mocks
What

If your organisation's allowedMcpServers or deniedMcpServers settings would block the stand-in servers, the eval run stops with a policy-blocked error instead of quietly starting nothing.

Details
  • The message advises allowlisting the stand-in command for eval runs, or passing --mocks off.
Evidence

mocks: stand-in blocked by managed MCP policy

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 v2.1.242 →