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 v2.1.228 Home All releases olderv2.1.227 v2.1.229newer
Claude Code v2.1.228

Write tool now refuses files covered by a Read deny rule

You'll notice
Useful4 Signal2
Permissions

Files covered by a Read deny rule can no longer be written, not just edited.

What

A Read deny rule in your permission settings now blocks writes as well as edits. Attempting to write such a file fails with "File is covered by a Read deny rule in your permission settings and cannot be written." No flag involved; this applies to everyone on this build.

Details
  • The check runs twice: in the Write tool's permission pre-check, which returns errorCode: 13, and again at write time, which throws a file-state error
  • Both paths use the same new message
  • Previously only the Edit path checked deny rules, with a message ending "...cannot be edited."
Evidence

File is covered by a Read deny rule in your permission settings and cannot be written.

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 →