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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.223 ·

Broader invisible-character detection in text sanitisation

More kinds of hidden and invisible characters are now stripped out of text you paste or read.

You'll notice Improvements
JSON All of v2.1.223
You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
Text SanitizationArea: what it touches
ImprovementsKind: in v2.1.223,
ImprovementsSection of the release
What

The sanitisation regex now catches more classes of hidden characters in text.

Details
  • previously matched only default-ignorable code points
  • now also matches control, format, private-use and unassigned categories, plus line and paragraph separators and backslash
Evidence

\p{Default_Ignorable_Code_Point}

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

See this entry in the whole of v2.1.223 →

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