What
When you cancel, Claude Code now also clears an attach that was being held and had not finished yet. Messages from a turn are now added through a single append step. A turn is one round of you sending something and Claude answering. The session also waits for its state to settle around the start of each turn.
Why
This may prevent timing problems when a remote session is cancelled while it is still starting up.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
It is not clear what the held attach is or which kinds of session this affects.