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Sweep 06 Nov 2026 · 01:32Z Build v2.1.319 537 read Stable v2.1.311 Latest v2.1.319 Next v2.1.319 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.269 ·

Permission pattern matching reworked to support real negation and per-source layering

Permission rules now support real negation patterns layered per source, including a bare ! that negates every path.

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What

The matcher that decides whether a file path matches a read or write permission rule has been restructured. Rules are now grouped by their root path and by which "source" (layer) they came from, and a negated pattern (one starting with !) is now tracked and removed from earlier layers rather than just being another pattern. A bare ! pattern on its own is now specifically recognized and logged as "a negation of every path." Path lookups also gained an option to match targets case-insensitively.

Why

This makes it possible to actually negate a previously granted permission pattern, including blanket-negating everything with !, and layers rules by where they came from so negations apply correctly across sources.

See this entry in the whole of v2.1.269 →

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