{"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-soykyxy4","versions":[{"created_at":"2026-06-13T15:02:43Z","element_count":73,"note":"5軸GA polish 41->92 by M5 (autonomous)","saved_by":"mcp","sha256":"bf4868cc166aca6bf892ee73bc636d3b458d1ee8ec4ce6c0a6bc2d533c951f19","version":3},{"created_at":"2026-06-13T14:48:43Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"e21ac3343b5b4db695f81d4b512a9c6380d322ba6bad8c8446b6dc4207b5bf26","version":2},{"created_at":"2026-06-13T14:48:42Z","element_count":101,"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}]}