Unclear Whether the tengu_bg_classifier_config or tengu_bg_classify gates are switched on for any account is unread, so nothing can be said about their status.
Claude Code runs a background classifier behind the scenes to judge the state of a conversation turn. It has gained a new turnBriefTailChars setting that would control how many trailing characters of the turn's text get quoted when building a "turn brief" summary, replacing a fixed-length cutoff. When this setting is present, the classifier can also produce this new 'turn brief' output, using a larger token budget than before, and report it through a new turn_brief telemetry event alongside the existing background-classification events.
However, the function that would supply this setting is hard-coded to return nothing in this build, so the new behavior cannot actually take effect yet.
This lays groundwork for a future feature that summarizes what happened at the end of a turn, but it has no effect on the current release.
Whether the tengu_bg_classifier_config or tengu_bg_classify gates are switched on for any account is unread, so nothing can be said about…