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.
The holiday promotion banner displaying "A gift for you - Your rate limits are 2x higher through 12/31" has been removed as the promotion period has ended.
Evidence
Removed function re2() at line 460646, vw0() at line 460649 (contained "tengu_year_end_2025_campaign_promo")
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.