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 terminal renderer now supports entering and exiting an alternate screen buffer via enterAlternateScreen() / exitAlternateScreen() methods, replacing inline ANSI escape sequences. Used by the year-in-review playback feature.
Evidence
New screen buffer methods (search for "enterAlternateScreen")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.