{"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-zjzmlpam","versions":[{"created_at":"2026-07-13T19:53:36Z","element_count":88,"note":"5軸GA polish 38->92 by M5 (autonomous)","saved_by":"mcp","sha256":"5951d2f5965fed9223cf02230b8271f0c19bf3bb2e9b96ac5225feceaab9500c","version":3},{"created_at":"2026-07-13T19:43:17Z","element_count":101,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"a1a20e10206367630cc251c643089ed15d1d70d61ddc3672ed823f6b3a2a0faa","version":2},{"created_at":"2026-07-13T19:43:17Z","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}]}