You'll noticeTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
SubagentsArea: what it touches
ImprovementsKind: in v2.1.300,
ImprovementsSection of the release
What
A subagent is a helper copy of Claude that works on part of a task in the background. Claude Code periodically writes a short summary of what each subagent is doing. These summaries used to run on a fixed interval.
The time between summaries now comes from a list of waits that Anthropic's servers provide, and the wait used depends on how many summaries have been made so far. If the next summary is not due yet, it is skipped.
When summaries stop, Claude Code now sends a usage record with the number of summary calls, how many failed, how many summary lines were accepted, and which model families were used.
Why
Each summary is an extra call to the model. Spacing them out on a schedule changes how often those extra calls happen during long subagent work.
