You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
SessionsArea: what it touches
ImprovementsKind: in v2.1.293,
ImprovementsSection of the release
What
Pressing the left arrow (←) sends the current work to the background. Claude Code now tells you when that does not happen straight away:
Cancelled: you have unsent text in the input. The message reads "Backgrounding cancelled - you have unsent text in the input. Send it or clear it, then press ← again."
Delayed: a question is waiting for your answer, so backgrounding happens after the current tool finishes.
Why
Before, pressing the left arrow in these situations gave no feedback. Now you can see why nothing happened and what to do about it.