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 v2.1.233 Home All releases olderv2.1.232 v2.1.234newer
Claude Code v2.1.233

Windows device-namespace paths are treated as network paths

You'll notice
Useful3 Signal2
Windows

On Windows, odd device-style paths are now blocked from attachments, uploads and deep-link directories.

What

Paths of the form \??\..., including ones that only take that shape after Windows normalization, now count as network paths everywhere the check is made. They are blocked for @-mention attachments and Chrome file uploads regardless of which network directories the session trusts, and deep-link working directories using them are rejected.

Details
  • One shared predicate now covers both \\ UNC paths and \??\ device-namespace paths; /net/<host> automounts are recognized by a separate predicate.
  • A per-module copy of the old check, which required a non-slash character after the two leading slashes and did no normalization, was deleted and its caller moved to the shared helper.
  • The executable-path check uses the combined predicate.
Evidence

Invalid cwd in deep link: UNC / network paths are not supported, got, network path not allowed:

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

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.233 →