{"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-l2u8p7ko","versions":[{"created_at":"2026-06-10T22:52:24Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy96334560→quote22225213 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"955d64ba11e8c80eb787985ad4d01dad973bcac0b977a0dafd981a356578ef5b","version":24},{"created_at":"2026-06-10T22:00:23Z","element_count":54,"note":"revert: houki rescan NG -> restore pre-polish elements (M5 2026-06-11)","saved_by":"mcp","sha256":"e952f952523a05edc40c16791df5dd726994a428ac92efc24d02b62451f61ba1","version":18},{"created_at":"2026-06-10T13:30:05Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積92.5㎡(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":"02f39912cfb5b903e13f0f0745e722a954c04285e8435a358e7affc63c650f91","version":9},{"created_at":"2026-06-10T11:43:50Z","element_count":72,"note":"5軸GA polish 54->96 by M5 (autonomous)","saved_by":"mcp","sha256":"5f2cea9a4b546a7b61de346ba2ca993f71e1b92068e474153827cc66b0af533f","version":4}]}