{"version":"2.1.274","anchor":"compaction-can-now-keep-a-tail-announcement-summary-of-key-a","canonical_anchor":"compaction-can-now-keep-a-tail-announcement-summary-of-key-a","heading":"Compaction can now keep a tail-announcement summary of key attachments across a compact boundary","tier":"soon","area":"Compaction","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.274\/e\/compaction-can-now-keep-a-tail-announcement-summary-of-key-a","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.274","markdown":"### Compaction can now keep a tail-announcement summary of key attachments across a compact boundary\n\nCompaction can now carry forward a short summary of key attachments across the compaction boundary\n\n**Unclear.** Whether the `tengu_calm_noodle` gate is active for any account hasn't been read, so nothing can be said about whether this behavior runs anywhere yet.\n\n**What**\n\nWhen a conversation is compacted (its history condensed to save space), Claude Code can now build a short 'kept tail' summary noting which key attachments, such as instructions, session context, coordinator context, context sections, and date attachments, were carried forward past the compaction point. This emits a `compact_kept_tail_announcements` telemetry event recording whether it was enabled, where it was placed, and which types were kept. If a related feature flag check fails, it bails out early and records `enabled:false`.\n\n**Why**\n\nThis makes it possible to track, and eventually improve, how well important context survives compaction instead of silently being dropped or duplicated.\n\n- Flag `tengu_calm_noodle`: Not enough to say (read for one account on one subscription tier against v2.1.274; this account: no value returned, anonymous baseline: no value returned, compiled default: on) 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.\n- Area: Compaction\n- Names: `tengu_calm_noodle`\n- Tier: Nothing to try yet\n- Useful: 3\/5\n- Signal: 3\/5\n- Present in the build but not switched on"}