{"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-yocc14ng","versions":[{"created_at":"2026-06-18T07:28:49Z","element_count":90,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"ab0524cc0f1735220cc813e437d41e69a51a36f5ada8de42d3d99f8e539e9bce","version":3},{"created_at":"2026-06-18T07:19:21Z","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":"089145e86b7262da5ee1b9136299efb17be837feb9425d46e1491aa87931036f","version":2},{"created_at":"2026-06-18T07:19:19Z","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}]}