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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.

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Claude Code v2.1.193

Background Operator & Safety Warning

What

Shell commands that include the & background operator now always trigger an approval prompt, regardless of existing allow rules.

Details
  • The & operator defers execution past approval-time safety checks, so it cannot be pre-approved reliably.
  • The prompt message explains: "This command uses the & background operator, which defers execution past approval-time safety checks. Approve only if you trust it."
  • This does not apply to && (and-then) or &> (output redirect); only actual backgrounding operators.
Evidence

New safety check (search for "background operator, which defers execution past approval-time safety checks")

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

See this entry in the whole of v2.1.193 →