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 v2.1.229 Home All releases olderv2.1.228 v2.1.231newer
Claude Code v2.1.229

Whitespace-only prompts now tell you nothing was sent

You'll notice
Useful3 Signal1
CLI

A whitespace-only prompt now tells you plainly that nothing was sent to the model.

What

In non-interactive runs, a prompt that contains only spaces or newlines now returns a warning instead of failing silently. The result reads "Blank prompt — the message was only whitespace, so nothing was sent to the model."

Details
  • The turn ends without querying the model at all, so no tokens are spent.
  • Previously the empty submission was only recorded internally, with no message back to the caller.
Evidence

the message was only whitespace, so nothing was sent to the model.

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

See this entry in the whole of v2.1.229 →