Unclear It is not settled what this switch controls: the change is described as goal-related, but the old switch has also been tied to long Bash output previews.
What
A subagent is a helper Claude starts to work on part of a job. When a subagent runs in the foreground and creates or updates tasks on the task list, its result can now include a taskCalls field.
taskCallslists the subagent's task-list calls in order, with each call's tool, input and result text.- It is optional in the Agent tool's output, and is marked internal: not a stable field for other programs to rely on.
- It is capped at 16384 bytes. A larger result is dropped, with the reason
over_size_limit. - Whether calls are recorded is decided by the server-controlled switch
tengu_bright_kettle, with a fallback of off. The same check used to readtengu_hushed_wren. Because the name changed, any server-side value set for the old name no longer applies. - The switch also widens which tool names are counted as task-list calls.
Readings this site took before this release found tengu_bright_kettle off for its own account and for an anonymous one. No reading has been taken under this release.
Why
Task-list changes a subagent makes appear in no other part of the transcript, so this lets the main conversation see them. Because the switch was renamed, whoever had the feature under the old name may lose or gain it.
tengu_bright_kettle Off in both readingsThe flag server returned off for the account this site reads and for the anonymous baseline. A reading of off cannot rule out a rollout these two readings sit outside of.
This account: off · anonymous baseline: off · compiled default in v2.1.317: off
These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.
tengu_hushed_wren Not enough to sayNothing here resolved what this flag was doing on this version, so nothing here should be read as on or off.
This account: no value returned · anonymous baseline: no value returned · compiled default in v2.1.317: not a boolean we can read
These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.
Read once, for one account on one subscription tier, against v2.1.317. It isn't a statement about your account. What a flag value here can and cannot tell you
It is not settled what this switch controls: the change is described as goal-related, but the old switch has also been tied to long Bash…
New in this build: tengu_bright_kettle