{"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-dvwg83ox","versions":[{"created_at":"2026-06-10T22:52:23Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote21376510 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"16dc6f64df85af29950cb7e2ff1f8038045ebb495964d3862bd0fdf086882add","version":23},{"created_at":"2026-06-10T13:29:17Z","element_count":66,"note":"backfill: 延床=居室床スラブ実面積93.5㎡(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":"c9eba1470c237232581609cddc8e6acae33331852b715821fb03123e0860ac0c","version":9},{"created_at":"2026-06-10T11:26:47Z","element_count":73,"note":"5軸GA polish 59->97 by M5 (autonomous)","saved_by":"mcp","sha256":"951c1ea9cfe95d2b183188e40cff9e84d0df6272935236802a0deb3e43debaac","version":3}]}