{"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-lrz8irbn","versions":[{"created_at":"2026-06-13T22:46:02Z","element_count":90,"note":"5軸GA polish 45->96 by M5 (autonomous)","saved_by":"mcp","sha256":"7de73dcafbb1031a3f098ea6baaf2dac50d31bc53b0418084b096a0105bb52ca","version":3},{"created_at":"2026-06-13T22:38:58Z","element_count":85,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"fcdf01938b17c4af15d217dcd73f4bfbf06a92c32f8efc9b88d22a641bc8ce0f","version":2},{"created_at":"2026-06-13T22:38:57Z","element_count":85,"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}]}