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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 v2.1.227 Home All releases ←olderv2.1.226 v2.1.228newer→
Claude Code v2.1.227

Hook output now appears in the transcript

You'll notice
Useful4 Signal3
Hooks

Hook output now shows in the transcript and reaches SDK consumers instead of vanishing.

What

Text produced by hooks is turned into visible assistant messages in the streamed output and counted as displayable by the output filter, so it reaches SDK consumers instead of being dropped.

Evidence

hook_system_message

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 v2.1.227 →