{"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-ct08uwvd","versions":[{"created_at":"2026-06-13T15:15:57Z","element_count":90,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"44d7349074360233aefd8d5a18579aa53c6602682ba7440a81079782997da06e","version":3},{"created_at":"2026-06-13T14:59:13Z","element_count":130,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"28cd248af8e1a71552a47c5a3725490f9e70aaf94478cfa8150152277c03a029","version":2},{"created_at":"2026-06-13T14:59:10Z","element_count":130,"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}]}