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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 v2.1.222

Model refusal fallback banner now also shown in non-main threads

You'll notice
Useful3 Signal0
Models

You now get told when a subagent swaps models after a refusal, not just the main thread.

What

A refusal-driven model swap that happens inside a subagent or other non-main thread now surfaces a banner, where previously only main-thread swaps did.

Details
  • The refusal-fallback result gained bannerScope, set to "session" for main-thread swaps and "local" otherwise
  • Non-main-thread turns emitting local scope now show the banner
  • The emitted model_refusal_fallback system message uses different wording depending on the scope
Evidence

bannerScope

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 v2.1.222 →