{"version":"2.1.69","anchor":"improved-summary-compaction-system","canonical_anchor":"improved-summary-compaction-system","heading":"Improved Summary\/Compaction System","tier":null,"area":null,"scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.69\/e\/improved-summary-compaction-system","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.69","markdown":"### Improved Summary\/Compaction System\n\nThe conversation summary system has been significantly revised:\n\n- New `<<ANALYSIS_INSTRUCTION>>` placeholder system for injecting analysis instructions\n- Support for partial compaction of only recent messages when earlier context is retained\n- Lean compaction mode (`tengu_lean_cast`) with shorter analysis prompts focused on coverage over detail\n- Better handling of large conversation files via optimized `compact_boundary` detection for files over 64MB\n\n**Evidence**\n\nSummary improvements (search for `\"<<ANALYSIS_INSTRUCTION>>\"`, `\"tengu_lean_cast\"`)"}