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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.251 ·

Directory permission entries containing null bytes are dropped

Directory permission entries containing null bytes are now discarded.

You'll notice New Features
JSON All of v2.1.251
You'll noticeTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
PermissionsArea: what it touches
New FeaturesKind: in v2.1.251,
New FeaturesSection of the release
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 →

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