Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
SDKArea: what it touches
Internal ChangesKind: in v2.1.282,
Internal ChangesSection of the release
What
The result format used by the SDK (the kit for driving Claude Code from other programs) has a new optional field, frame_intake_phases_ms. It splits the time between a message from the host program arriving and it being queued for Claude into steps: before_read, dedup, flag_settle, receive_hook, attachments, admission_wait, admit_check and other. The format marks the field as internal.
Why
The breakdown helps show where time goes when a message sent to Claude Code is slow to start being handled, for example on a slow first turn in an SDK or remote session. Because it is marked internal, it is not meant to be relied on.
Read from
Names in the bundleframe_intake_phases_ms
How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtIt is not clear whether Claude Code currently fills in this field.
