Sweep 19 Sep 2026 · 02:36Z Build v2.1.278 500 read Stable v2.1.267 Latest v2.1.278 Next v2.1.278 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.271 ·

Shell safety check widened for declare/typeset/local flags

Bash/zsh permission checks now catch more declare/typeset/local flag combinations that can silently change variable behavior

TierYou'll noticehow much it should matter to you
Useful2my rating, 1 to 5
Signal1worth watching, 1 to 5
AreaBash Permissionswhat it touches
KindImprovementsin v2.1.271,
Group of 2 You'll notice

Bash/zsh permission checks now catch more declare/typeset/local flag combinations that can silently change variable behavior

What

  • The bash/zsh command-injection-safety analyzer now flags declare, typeset, and local when used with flags for nameref, integer, float, array, width-truncation, or case-conversion behavior as "too-complex", and also broadens export/readonly flag detection to include more flags beyond the previous set.
  • The zsh typeset/declare permission check that blocks silent auto-approval when eval-changing flags are present now also catches width-truncation/case-conversion flags and the -l/-u flags, not just the previous set, and applies the check per-argument instead of only to the first flag group.

Why

These flags can change how a variable is interpreted or displayed, so catching more of them closes gaps where a command could silently auto-approve when it shouldn't.

See this entry in the whole of v2.1.271 →