Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
ElsewhereArea: what it touches
Internal ChangesKind: in v2.1.280,
Internal ChangesSection of the release
What
Claude Code's internal agent wake router, which delivers messages to background or resumed agents, gains a recovery path for messages that got stuck when an agent's resume previously failed. It now subscribes to a agentStrandedMessages signal and retries delivering those queued messages, running a flushStranded check before each routing pass. If delivery still cannot succeed, it emits an agentResumeFailed event marked as undeliverable and/or terminal.
Why
This reduces the chance that a message to a sub-agent silently disappears after a failed resume, since Claude Code will now keep retrying delivery and clearly flag the cases where it ultimately gives up.
