{"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-s5ktrha9","versions":[{"created_at":"2026-06-10T22:52:35Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote18693989 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"db1080ac1662a5f215aad5c89eecb40d3cd2b6e114ac43b9b768fc5358f9f1b5","version":18},{"created_at":"2026-06-10T13:56:45Z","element_count":70,"note":"5軸GA polish 66->96 by M5 (autonomous)","saved_by":"mcp","sha256":"a9ed93da9793c8df52a180fd65b80a2982ee655cdb5c8ac6aefa95b127d8deda","version":5},{"created_at":"2026-06-10T13:46:15Z","element_count":50,"note":"backfill: 延床=居室床スラブ実面積74.1㎡(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":"033e8534a38ffe3c6135812e0201ce85ad82f0b43ae007aa6c51f822360788f6","version":4}]}