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.
If the model changes while a switch prompt is open, you're asked to pick again rather than applying a stale choice.
What's wrong with this entry?
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What
Answering the model-switch confirmation now re-checks that the model has not changed since the prompt appeared. If it has, you get "The model changed while you were confirming; pick again" instead of a stale choice being applied.
Evidence
The model changed while you were confirming; pick again
Strings lifted out of the shipped bundle, so the claim above can be checked against them.