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Sweep 03 Nov 2026 · 22:27Z Build v2.1.318 536 read Stable v2.1.311 Latest v2.1.318 Next v2.1.318 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.318 ·

Text cleaning before the model sees input uses a changed rule set

Claude Code's text cleaner now draws rules from three sources, adds a pass for control tags, and fixes replacements to apply to the text being cleaned

Under the hood Internal Changes
JSON All of v2.1.318
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
Prompt SafetyArea: what it touches
Internal ChangesKind: in v2.1.318,
Internal ChangesSection of the release

Unclear What the rule sources contain and what the extra control-tag step removes is not clear.

What

Claude Code cleans some text before the model sees it, removing or changing parts that could be mistaken for instructions. That cleaner has changed:

  • Its rules now come from three sources, and one source is skipped in some cases
  • When something it finds is a control tag, it runs an extra step
  • Replacements now apply to the text being cleaned, fixing earlier code that matched against the wrong text
Why

This can change what text is removed from what the model reads.

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtWhat the rule sources contain and what the extra control-tag step removes is not clear.

See this entry in the whole of v2.1.318 →

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