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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 v2.1.248

Ultrareview preflight sends an extra header

Under the hood
Useful1 Signal2
Code Review

The review preflight request sends one extra header; nothing else changes.

What

The preflight request to the review endpoint carries one additional header. The refusal paths for essential-traffic-only mode, data residency and missing auth are unchanged.

Evidence

api_ultrareview_preflight

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 v2.1.248 →