{"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-tsw4c7ii","versions":[{"created_at":"2026-06-13T14:20:35Z","element_count":90,"note":"5軸GA polish 43->97 by M5 (autonomous)","saved_by":"mcp","sha256":"d2d633274d99477f4472fada55ac7728de2469d85683e3bf791fdeed5d8193f5","version":3},{"created_at":"2026-06-13T14:14:49Z","element_count":87,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f8f7cf6526b636918494c6105c0aa7dc2207802e4ed0bfb322e29081edf237e1","version":2},{"created_at":"2026-06-13T14:14:48Z","element_count":87,"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}]}