{"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-qqf4rlyv","versions":[{"created_at":"2026-06-10T22:52:25Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy84287347→quote21245272 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"485222fa3f9c8d804a801c7033f96c53775544d166d4958c6d366e6d793e4943","version":22},{"created_at":"2026-06-10T13:31:02Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積87.5㎡(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":"11fce66ac776e5d57aa88f75f17df534382494105c29250dbba0496941c1e1c1","version":8},{"created_at":"2026-06-10T11:59:58Z","element_count":90,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"12bd83de93f7fcba9b4f6d987a8155adb94543a6de3eb3c9b4cddeca69dff7a3","version":3}]}