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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 v2.1.233 Home All releases ←olderv2.1.232 v2.1.234newer→
Claude Code v2.1.233

Agent files no longer get spurious shell: frontmatter errors

You'll notice
Useful3 Signal1
Agents

Your agent files stop being wrongly flagged with a shell frontmatter error.

What

The frontmatter validator only applies the metadata mapping check and the shell value check to skill and command files now, so agent definitions stop being flagged with "shell must be 'bash' or 'powershell'".

Evidence

shell must be 'bash' or 'powershell', got

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 v2.1.233 →