{"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-vauw6z89","versions":[{"created_at":"2026-06-16T20:00:17Z","element_count":90,"note":"5軸GA polish 40->94 by M5 (autonomous)","saved_by":"mcp","sha256":"49afaa4540401e765130c1a6c16502e54b8ce3bc1f117c63bdfa68e3e76b686c","version":3},{"created_at":"2026-06-16T19:53:43Z","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":"ac2776ba3ca3b0023ed9ff84880c137f37aed187975d89557594bc26f49d8667","version":2},{"created_at":"2026-06-16T19:53:43Z","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}]}