{"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-gwt47j3m","versions":[{"created_at":"2026-06-10T22:52:28Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote20039150 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"e48e1ff747c746092d892f23da588b051259beed47ddea39983cb881655d5130","version":21},{"created_at":"2026-06-10T13:32:38Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積78.3㎡(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":"28d69fe6ea73689d2523a349843f3a1b32867303bf5a19b1c0807d376572651a","version":7},{"created_at":"2026-06-10T12:16:04Z","element_count":73,"note":"5軸GA polish 56->97 by M5 (autonomous)","saved_by":"mcp","sha256":"9fbc5e4d062326ddd930b544575a4df02b5afa6eba1fbe0d92e0ac5cdcbed2ac","version":3}]}