{"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-o9eqtueg","versions":[{"created_at":"2026-06-13T17:24:29Z","element_count":89,"note":"5軸GA polish 38->93 by M5 (autonomous)","saved_by":"mcp","sha256":"de3d5f071104984a08210f491bef3eccb5d13cc50e07674d6328adf3b9d9982e","version":3},{"created_at":"2026-06-13T17:10:56Z","element_count":119,"note":"loop3: 設計時延床 65.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"0078f654db1edbb698f8b8503a046757a6a2737c9cb346f7f7b3fc45032ea417","version":2},{"created_at":"2026-06-13T17:10:50Z","element_count":119,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}