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 v2.1.223 Home All releases olderv2.1.222 v2.1.224newer

Edit and Write tool descriptions vary by model

Under the hood
Useful2 Signal0
Elsewhere

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

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 →