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 v2.1.227 Home All releases olderv2.1.226 v2.1.228newer
Claude Code v2.1.227

Clamped agents are blocked on every execution surface

You'll notice
Useful3 Signal3
Permissions

Command-restricted agents are now blocked on PowerShell and the Monitor tool too, and fail closed.

What

An agent restricted to a specific set of allowed shell commands is now denied when it tries to run through PowerShell or the Monitor tool's websocket mode, not just Bash. A crash inside the permission check now denies for those agents rather than letting the command through.

Details
  • Denials carry a dedicated reason, e.g. "bashCommandClamp: no clamp rule matches this command".
  • Bash denials emit a tengu_bash_command_clamp_denied event.
  • The permission check now fails closed for clamped agents; previously an error in the check could result in execution proceeding.
Evidence

bashCommandClamp: no clamp rule matches this command

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

See this entry in the whole of v2.1.227 →