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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.

← All of v2.1.251 Home All releases ←olderv2.1.250
Claude Code v2.1.251

Directory permission entries containing null bytes are dropped

You'll notice
Useful1 Signal1
Permissions

Directory permission entries containing null bytes are now discarded.

What

When a permission update adds working directories, any entry containing a null byte is now discarded, on top of the existing checks that reject non-strings and blank entries.

Evidence

addDirectories carries a directory containing a null byte

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

See this entry in the whole of v2.1.251 →