Under the hood
Claude Code now tracks whether queued prompts have been withdrawn and what delivery class they used
What
The internal system that tracks queued prompts and commands now keeps an explicit record of whether each queued item has been withdrawn, using a lookup keyed by item id along with helper functions to register and check-and-withdraw entries. The delivery-recording logic also now tracks which items were held alongside a delivery class, and tracks lineages it has already seen.
Why
This is internal bookkeeping for how queued prompts move through the system; it isn't described as changing what a user sees, but it should make the queue's withdrawal and delivery state more reliable to track.