{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-3r0j4rnf","versions":[{"created_at":"2026-06-10T22:52:28Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87413760→quote22820833 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"8734a151c3fcdc66ca7c508da467c5d3ae8956c5bf954c60270e84457451d13a","version":21},{"created_at":"2026-06-10T13:34:12Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積97.8㎡(基礎/屋外/ロフト除外)。設備数量/コスト過大の是正","saved_by":"mcp","sha256":"23247ee7df3269cd38fde9a922802476da9ec64f771184abecd2d5c9a93d9625","version":8},{"created_at":"2026-06-10T12:31:46Z","element_count":68,"note":"5軸GA polish 60->95 by M5 (autonomous)","saved_by":"mcp","sha256":"88f530befe9371ca451311d33bd5b328bae2136c45b16b763b85b4ae247ab314","version":4}]}