{"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-985j33tr","versions":[{"created_at":"2026-06-10T22:52:32Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote18890067 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"a436fd9b430decc3aa2e894dd6e32c5d52dd5d0c48fdf29a6bb067ed2d5c5fa4","version":20},{"created_at":"2026-06-10T13:35:22Z","element_count":77,"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":"4586314634af48af1b4417fdd8b8c46463a4edb85dc6485214051e718147e5bf","version":7},{"created_at":"2026-06-10T13:05:46Z","element_count":84,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"88f607fb8b5e6ebbbc2f514c828f37c6904c3d2d611f303cbee91cae237a3800","version":4}]}