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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.

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Claude Code v2.1.242

File dialogs on Windows are locked down during computer use

You'll notice
Useful3 Signal3
Computer Use

In Windows file dialogs Claude can only type into the File name box; other input is blocked.

What

Inside common Windows file dialogs, Claude can now only type into the File name box. The address bar and search band refuse typing, and right-click, Alt-modified clicks and drag-and-drop inside the dialog are blocked outright.

Details
  • Multi-key chords must be sent one key at a time inside a file dialog; tab and newline characters in typed text are refused.
  • Refusals carry the reason code file_dialog_restricted, new in this build.
  • The checks only run when the platform is win32 and the host reports both the focused control and the control under the pointer; otherwise the dialog is treated as an ordinary window.
Evidence

file_dialog_restricted

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 v2.1.242 →