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 v2.1.234 Home All releases olderv2.1.233 v2.1.235newer
Claude Code v2.1.234

Token counting no longer throws on incomplete blocks

You'll notice
Useful2 Signal1
Elsewhere

Token counting handles incomplete blocks instead of throwing.

What

Counting input size across text, thinking and redacted thinking blocks now treats a missing field as zero length instead of reading it directly, so a malformed block cannot break the count.

Evidence

inputTextCharLength

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

See this entry in the whole of v2.1.234 →