{"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-hawthornhouse-kvs74ddb","versions":[{"created_at":"2026-07-02T03:25:37Z","element_count":60,"note":"5軸GA polish 38->85 by M5 (autonomous)","saved_by":"mcp","sha256":"a8be660cc965c979fd49e4c74983d6ccfae058ad4128e5ecc13cc8e4586a5ae4","version":3},{"created_at":"2026-07-02T03:13:43Z","element_count":119,"note":"loop3: 設計時延床 50.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"ae41497b7744c62cf63c5c8ad80a34eb0de25fb51356e2d606090f4fd753c9e3","version":2},{"created_at":"2026-07-02T03:13:43Z","element_count":119,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}