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 v2.1.90 Home All releases olderv2.1.89 v2.1.91newer
Claude Code v2.1.90

PowerShell Security Improvements

  • Background job operator (&) detection: PowerShell commands using the & operator now trigger a security prompt with the message "Command uses the background job operator (&) which spawns a child PowerShell process" (search for "background job operator").
  • Remove-Item -Recurse safety: Deleting the working directory (including .git and .claude) via Remove-Item -Recurse now requires manual approval (search for "Remove-Item -Recurse targeting").
  • Action parameter validation: PowerShell common parameters like -ErrorAction, -WarningAction (and their aliases -ea, -wa, etc.) are now validated to ensure they use expected values (SilentlyContinue, Stop, Continue, Ignore), preventing abuse of these parameters.
Evidence

PowerShell AST parser (search for "hasBackgroundJob" and "background job operator")

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

See this entry in the whole of v2.1.90 →