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 v2.1.247 Home All releases olderv2.1.246 v2.1.248newer
Claude Code v2.1.247

Attaching to an unresponsive background session says so

You'll notice
Useful3 Signal2
Sessions

Attaching to a live but silent background session now says "Session isn't responding" instead of a vague error.

What

Attaching to a background session that is alive but silent now reports that specific condition instead of failing with an unexplained error. A new ENORESPONSE case, a distinct attach failure meaning the session did not answer, surfaces as "Session isn't responding", and the fleet view of running jobs branches on it: a finished job that is not responding shows that fixed message, while a live one goes through the restart prompt.

Details
  • Both the ENORESPONSE condition and the "Session isn't responding" text are new in this build.
  • Attach failures for reasons other than no response are unchanged and still report their own error.
  • The restart prompt text is unchanged: press Enter again to restart it (the conversation is saved).
  • The same area gained a hand-written parser for kitty-protocol keyboard escape sequences, an extended terminal key encoding, matching specific key codes.
Evidence

press Enter again to restart it (the conversation is saved), Session isn't responding

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

See this entry in the whole of v2.1.247 →