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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 v2.1.221

Stats panel rewritten as a compiler-memoized component

Under the hood
Useful2 Signal0
Usage & Limits

The stats panel was rebuilt for faster redraws; one hidden 'Shot distribution' block still can never appear.

What

The interactive stats panel was rebuilt into React-Compiler output, with no change to what it renders apart from the new cache-token line.

Details
  • Covers the view rendering "Favorite model:", "Total tokens:", "Longest streak:" and "Current streak:".
  • Uses a 102-slot memo cache, with each sub-element cached and recomputed only when its inputs change.
  • The dead "Shot distribution" block survives the rewrite but its condition is a literal null, so it can never render.
Evidence

Shot distribution

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 v2.1.221 →