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 v2.1.224 Home All releases olderv2.1.223 v2.1.225newer

Clearer denial when a tool needs approval but no prompt can be shown

You'll notice
Useful4 Signal2
Permissions

When no prompt can be shown, denials now tell the model not to fake success.

What

In background and async contexts where a permission prompt cannot be displayed, tools requiring approval are now denied with an explicit instruction not to claim success or retry, replacing the generic "Permission to use X has been denied" wording. A structured decision reason is recorded alongside it.

Evidence

Permission for this tool use was denied: it requires interactive approval, and permission prompts are not available in this session.

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

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.224 →