{"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-7oj23hew","versions":[{"created_at":"2026-07-31T06:14:21Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f6f7e7e3876f6d25ca4b178ca9ff24fe132b28e288b03af55f56ae713e8f3d8c","version":2},{"created_at":"2026-07-31T06:13:19Z","element_count":105,"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}]}