{"version":"2.1.274","anchor":"background-classifier-gains-a-currently-dark-turn-brief-ta","canonical_anchor":"background-classifier-gains-a-currently-dark-turn-brief-ta","heading":"Background classifier gains a (currently dark) turn-brief tail-length knob","tier":"soon","area":"Background Classifier","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.274\/e\/background-classifier-gains-a-currently-dark-turn-brief-ta","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.274","markdown":"### Background classifier gains a (currently dark) turn-brief tail-length knob\n\nBackground classifier gets a new, currently inactive setting to control how much recent conversation text it quotes\n\n**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.\n\n**What**\n\nClaude 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.\n\nHowever, 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.\n\n**Why**\n\nThis 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.\n\n- Area: Background Classifier\n- Names: `turnBriefTailChars`\n- Tier: Nothing to try yet\n- Useful: 3\/5\n- Signal: 4\/5\n- Present in the build but not switched on"}