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Reading a new release v2.1.251 Analysing changes · 2/5 Sorting the findings · 1/4 steps 470 findings $18.91 so far

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 v2.1.198

Windows Sandbox: Per-Exec Deny Flags

What

Windows sandbox commands now support per-exec denyRead and denyWrite path lists, matching Linux/macOS behavior.

Details
  • Previously, Windows sandbox was deny-listed only at the session level
  • Now individual exec calls can pass filesystem.denyRead and filesystem.denyWrite path arrays
  • filesystem.allowRead (re-allow within denyRead) is still not supported on Windows — remove entries or narrow denyRead
  • filesystem.allowWrite is still not supported on Windows (Windows sandbox uses deny-list only)
Evidence

Error messages (search for "Per-exec filesystem.allowRead (re-allow within denyRead) is not supported on Windows")

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 v2.1.198 →