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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

Eval runs clean up the whole process tree

Under the hood
Useful2 Signal3
Plugin Eval not in their notes

Plugin eval kills the whole process tree so spawned tools don't outlive the run.

claude plugin eval
What

Child agents spawned by claude plugin eval now run detached and are killed as a whole process group on completion, interrupt or timeout, so tools they spawned do not outlive the run. The runner also accepts a separate set of operator-forced allowed tools, merged with the ones the eval case declares.

Details
  • Non-Windows kills the group with SIGKILL by negative process id; Windows uses taskkill /T /F.
  • Detaching is skipped on Windows.
Evidence

process.kill(-Ce.pid, "SIGKILL")

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 →