{"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-tt8rm00o","versions":[{"created_at":"2026-06-10T22:52:34Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote20778201 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"a5672b42d59a03623b11bec68a8a15eb6fcc4e61a85b9e07bdf094b37208329d","version":19},{"created_at":"2026-06-10T13:55:30Z","element_count":83,"note":"5軸GA polish 67->98 by M5 (autonomous)","saved_by":"mcp","sha256":"465ef04000b3ac75590308780af04e9b0fa92646578d82fa60c177e9086ac9c4","version":6},{"created_at":"2026-06-10T13:45:39Z","element_count":44,"note":"backfill: 延床=居室床スラブ実面積90.0㎡(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":"47bc2b990e0f93dc59f5fdc60c585387355e878823aacd556e86cd97b3488e73","version":5}]}