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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 v2.1.224

Agent versions are sequential integers, not timestamps

Under the hood
Useful1 Signal2
Agent SDK Docs

Agent versions are documented as counting up from 1, not timestamps.

What

The docs previously said each agent update produced a version numbered with a timestamp, and gave a timestamp example. They now say versions start at 1 and increment by one on each update.

Details
  • Also tightened: effort is the only field exempt from full replacement when you supply a model object, and supplying model without inference_geo clears any pinned geography.
Evidence

a sequential integer, starting at 1 and incrementing on each update

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 v2.1.224 →