{"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-s6it7400","versions":[{"created_at":"2026-06-10T22:52:38Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote21159829 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"393e4eeb0ec6c02a9379ac2fc9ec534ae58693a8396d4de6f4bae268d2d88216","version":17},{"created_at":"2026-06-10T14:29:43Z","element_count":72,"note":"5軸GA polish 60->96 by M5 (autonomous)","saved_by":"mcp","sha256":"06ed626aba207404a9561b28437290db45124b6b715875805958ee4134f5c0ee","version":7}]}