Source Intelligence

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.

All of v2.1.228 Home All releases olderv2.1.227 v2.1.229newer
Claude Code v2.1.228

Numbers in exponent notation tokenize as one value

You'll notice
Useful2 Signal1
Internals

Numbers like 1e-9 are now read as a single value instead of being split.

What

The number scanner previously stopped at digits, - and ., splitting a value like 1e-9. It now also consumes e/E and a sign directly after it.

Evidence

type: "number"

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

See this entry in the whole of v2.1.228 →