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Sweep 22 Sep 2026 · 17:19Z Build v2.1.280 501 read Stable v2.1.267 Latest v2.1.280 Next v2.1.280 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.260 ·

Ambiguous backslash/parenthesis detection in permission rules

Permission rules with ambiguous backslashes, common in Windows paths, now error clearly instead of misparsing.

TierYou'll noticehow much it should matter to you
Useful2my rating, 1 to 5
Signal1worth watching, 1 to 5
AreaPermissionswhat it touches
KindBug Fixesin v2.1.260,
You'll notice

Permission rules with ambiguous backslashes, common in Windows paths, now error clearly instead of misparsing.

Permission rule validation, such as for Bash(...) allow/deny rules, now catches rules where a backslash before a parenthesis is ambiguous, a pattern common in Windows paths, and returns a dedicated error instead of silently misparsing the rule. The error suggests using forward slashes or doubling backslashes and escaping parentheses.

See this entry in the whole of v2.1.260 →

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