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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.

← All of v2.1.251 Home All releases ←olderv2.1.250
Claude Code v2.1.251

Tooling to adopt recorded mock responses into a replay directory

Under the hood
Useful1 Signal3
Plugin Eval

Eval tooling can adopt recorded mock responses into a checksummed replay directory.

What

Internal eval tooling can now take newly recorded MCP mock server responses from a run and adopt them into a .replay/ directory, with a manifest file and per-file sha256 hashes so a copy can be checked, and guards against another process writing at the same time.

Details
  • Developer and eval tooling only; nothing here is reachable from a normal session.
Evidence

Each line carries the sha256 of the file as written; check the copy you take against the hash printed to the terminal

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 v2.1.251 →