{"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-nhuvvz5o","versions":[{"created_at":"2026-06-13T21:01:25Z","element_count":90,"note":"5軸GA polish 46->98 by M5 (autonomous)","saved_by":"mcp","sha256":"493be54ac93dc121be345aa4d8e8065ae90290a78dc5516745d0a055d0744f0f","version":3},{"created_at":"2026-06-13T20:51:00Z","element_count":87,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"78ebe804e474c39dddc62b8cbf14833fbf5a4daee4504a51ae8c9e5d0cabcf52","version":2},{"created_at":"2026-06-13T20:50:55Z","element_count":87,"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}]}