What
When you send a message and Claude Code puts it in a queue to handle, the queued message now carries a breakdown of how long each step of taking it in took. The steps are:
- before reading
- removing duplicates
- waiting for settings to settle
- running the receive hook (a script you can set to run when a message arrives)
- attachments
- waiting to be admitted
- the admission check
- everything else
The usage report sent when a message is queued also gains two fields: whether a read-ahead option was switched on, and whether it was actually used.
Why
This is measurement only and changes nothing you see. It suggests Claude Code is testing whether reading attachments ahead of time makes messages get handled faster.
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 which setting switches the attachment read-ahead on.