Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
SDKArea: what it touches
Internal ChangesKind: in v2.1.286,
Internal ChangesSection of the release
What
The SDK (the kit for driving Claude Code from other programs) can report how long each step takes between a message arriving and it being queued for Claude. The first step used to be one block that included waiting behind earlier messages. It is now split into:
startup_wait, time spent waiting for Claude Code to finish starting
control_requests_ahead, time spent behind earlier control requests
user_frames_ahead, time spent behind earlier user messages
before_read, which now holds only what is left over
Why
When a message is slow to be handled, this shows more precisely where the time went.
