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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.

← All of v2.1.228 Home All releases ←olderv2.1.227 v2.1.229newer→

Claude Code v2.1.228 11 Aug 2026

Combining marks stripped from input text

You'll notice

Useful2 Signal2

Elsewhere

Input text with stacked combining marks is now flattened before it reaches you.

What

Text sanitization now normalizes to NFC and replaces combining diacritical marks with spaces, which is the path that defends against zalgo-style or invisible-mark text.

Details

Covers U+0300–U+036F plus the other combining blocks (U+0483–U+0489, U+1AB0–U+1AFF, U+1DC0–U+1DFF, U+20D0–U+20F0, U+A66F–U+A67D, U+FE20–U+FE2F) and two further character classes.
Runs before the existing cleanup.

Evidence

[\u0300-\u036F\u0483-\u0489\u1AB0-\u1AFF\u1DC0-\u1DFF\u20D0-\u20F0\uA66F-\uA67D\uFE20-\uFE2F]

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 →