{"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-cifijo2v","versions":[{"created_at":"2026-06-16T06:35:29Z","element_count":82,"note":"5軸GA polish 40->94 by M5 (autonomous)","saved_by":"mcp","sha256":"031226089944802d16a935a7f2cf6812f8ab13cd6b681ab3511d53c3bec18e16","version":3},{"created_at":"2026-06-16T06:22:35Z","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":"6a7a6150b2f39270d5a058018f047fcc033c74690cc0137449513aaf38f8279c","version":2},{"created_at":"2026-06-16T06:22:31Z","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}]}