Follow Discord
Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.223 ·

Edit and Write tool descriptions vary by model

Edit and Write tool instructions can be shortened for certain models, dropping the read-first clause.

Under the hood In Development
JSON All of v2.1.223
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
ElsewhereArea: what it touches
In DevelopmentKind: in v2.1.223,
In DevelopmentSection of the release
What

The short-form Edit description and a new Write description builder can omit the "you must Read the file first" clause, giving certain models a shorter tool contract.

Details
  • gated on an internal predicate plus per-model checks
  • when the predicate is on, or the model is not one of the listed ones, the existing longer text is used unchanged
Evidence

Writes a file to the local filesystem, overwriting if one exists.

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 →

Feedback