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Reading a new release v2.1.251 Analysing changes · 2/5 Writing the entries · 2/4 steps 470 findings $18.91 so far

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 v2.1.166 5 Jun 2026

Model-switch tip now points to /config

When Claude automatically switches to a different model because the current model's safety measures flagged a message, a new tip is shown beneath the notice:

  ⌿  Tip: You can configure model switch behavior in /config

This helps users discover the switchModelsOnFlag setting, which controls whether Claude switches models or pauses on a safety flag.

Evidence

Tip added to model-switch notice (search for "Tip: You can configure model switch behavior in /config")

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

See this entry in the whole of v2.1.166 →