{"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-g9z8fa07","versions":[{"created_at":"2026-06-10T22:52:25Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy61441200→quote24881496 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"7b19217af89554333e573e9cdc5a75b2e72986465622bc07fc017793d89f9124","version":23},{"created_at":"2026-06-10T13:30:31Z","element_count":63,"note":"backfill: 延床=居室床スラブ実面積118.8㎡(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":"495496d3efb90b4bdc2a68d9f049303fb8296250427184579f4eae30c12d8160","version":9},{"created_at":"2026-06-10T11:43:53Z","element_count":85,"note":"5軸GA polish 52->97 by M5 (autonomous)","saved_by":"mcp","sha256":"8e3afca5d1015fc4a94aa86dd6f3defbf3c81022617f8e889c0920f20a32a631","version":4}]}