{"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-5tm66xdy","versions":[{"created_at":"2026-07-17T14:00:04Z","element_count":70,"note":"5軸GA polish 39->91 by M5 (autonomous)","saved_by":"mcp","sha256":"bd8f9546fc718fc11362c596333ec951735221fd8ea9c23ad88728e3fb21f504","version":3},{"created_at":"2026-07-17T13:56:51Z","element_count":86,"note":"loop3: 設計時延床 70.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"3ebc5a65fcc40f03322f0dd0676c4cf393935c3ae32e81e702f8fc8aaa44085e","version":2},{"created_at":"2026-07-17T13:56:51Z","element_count":86,"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}]}