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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 v2.1.63

Opus 4.6 Launch Promo Removed

The Opus 4.6 launch promotional banner, extra usage promo text ("$50 free extra usage", "/extra-usage to enable"), and associated feed display logic have been cleaned up. The tengu_copper_lantern and tengu_silver_lantern feature flag checks and related UI components are removed.

Evidence

Removed functions (search for removed strings "Opus 4.6 is here", "$50 free extra usage")

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 v2.1.63 →