{"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-yxtcqd36","versions":[{"created_at":"2026-06-13T20:00:09Z","element_count":68,"note":"5軸GA polish 45->95 by M5 (autonomous)","saved_by":"mcp","sha256":"1d89124e15d0a9f88ec10fc4f16f09012072a2470b19a5def55f83ad776d7717","version":3},{"created_at":"2026-06-13T19:51:23Z","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":"b0eed881f147271a8c0ef77475c54b81c619172d9f414f6654dee199a9cc4889","version":2},{"created_at":"2026-06-13T19:51:22Z","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}]}