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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 v2.1.225 7 Aug 2026

Protobuf and CEL runtime restructured into CommonJS module exports

Under the hood

Useful1 Signal0

Elsewhere

Bundled protobuf and expression-evaluator code was repackaged, with no change you can see.

What

The bundled protobuf descriptor and CEL evaluator code moved from module-scope variables to explicit exported members.

Details

Edition and SymbolVisibility enums are now published with matching *Schema descriptors.
CEL conversions go through exported toCel, celError and isCelUint helpers.
No behaviour change is visible from the diff; it reads as a bundling or module-format change.

Evidence

SymbolVisibilitySchema

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.225 →