{"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-kd5mve0x","versions":[{"created_at":"2026-06-10T22:50:18Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy84109586→quote22578729 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"a13de7dde077d0e9c6eb6db44de70360b39e99b734628a70f4ff1062fc7dbe64","version":25},{"created_at":"2026-06-10T13:08:14Z","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":"a2478581aff8dc92a75ae448d130ad79ff6ffe7eb66c35485b313da23e66360e","version":11},{"created_at":"2026-06-10T07:42:19Z","element_count":91,"note":"5軸GA polish 59->98 by M5 (autonomous)","saved_by":"mcp","sha256":"11aff074285465393dbdf84e66a5e3216f5a007d385c01ac054a073e3238be53","version":2}]}