Source Intelligence

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

All of v2.1.238 Home All releases olderv2.1.237 v2.1.239newer
Claude Code v2.1.238

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

You'll notice
Useful3 Signal3
Permissions

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

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 →