{"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-ellingtonhouse-3ho2oawi","versions":[{"created_at":"2026-07-01T00:32:37Z","element_count":92,"note":"5軸GA polish 38->90 by M5 (autonomous)","saved_by":"mcp","sha256":"80801c41aaba1aee7e9981dae0265d88e765068667fa225ff881ade7774278b3","version":3},{"created_at":"2026-07-01T00:28:54Z","element_count":101,"note":"loop3: 設計時延床 45.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"7b4db6218d4d932375ff1fcff0878dbf211666297f383ca1ae074837923768c4","version":2},{"created_at":"2026-07-01T00:28:54Z","element_count":101,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}