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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 v2.1.228

SDK and streaming-input sessions no longer look idle while you are using them

You'll notice
Useful4 Signal2
SDK

SDK and streaming sessions no longer time out as idle while you are actively typing.

What

Inbound user activity over the SDK and streaming input now counts against the idle timer. Previously a session could be treated as idle while the user was actively interacting.

Details
  • Fires on user messages, bash_command messages, and responses to permission, dialog and elicitation requests.
  • Also fires on control requests including interrupt, set_model, set_permission_mode and message_rated.
  • Remote workers additionally mark activity on their own idle tracker.
Evidence

recordUserDrivenInbound

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.228 →