{"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-9kxdbiw4","versions":[{"created_at":"2026-06-15T06:08:53Z","element_count":83,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"a1610d5b4be2bb4d128ea7fa08a5c3560f1a4c40d048d413e8984d63ad36e5a3","version":3},{"created_at":"2026-06-15T05:57:24Z","element_count":134,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"39b46b87d6a1e83d11bd12567823ae62c8e14081c6787f0c6830b18e05aa73e5","version":2},{"created_at":"2026-06-15T05:57:24Z","element_count":134,"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}]}