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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.238 ·

zsh =(CMD) process substitution no longer takes the fast permission path

Zsh =(cmd) process substitution is now treated as too tricky to auto-approve, so permissions ask.

You'll notice Bug Fixes
JSON All of v2.1.238
You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
PermissionsArea: what it touches
Bug FixesKind: in v2.1.238,
Bug FixesSection of the release
What

Commands using zsh's =(CMD) process substitution are now classified as too complex to analyse, so they fall out of the fast permission path and are handled conservatively instead of being misread.

Details
  • Applies to text starting with =( inside [[ ]] tests, and to regex operands containing an unquoted =( after a start, |, || or && boundary.
  • A new scanner tracks quoting, escaping and paren depth to spot the construct.
  • Unconditional in the command analyser.
Evidence

contains zsh =(CMD) process substitution

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

See this entry in the whole of v2.1.238 →

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