{"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-dm3s9he5","versions":[{"created_at":"2026-06-13T16:04:04Z","element_count":90,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"97a532da3f16e71cf07ef4316e94a3ccfcb6a77316a20f1f952decadd5af7e7e","version":3},{"created_at":"2026-06-13T16:00:50Z","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":"16e2c001b679ffbd66304514ef68370cbf2893af4ad3b59c6794afea282acf5c","version":2},{"created_at":"2026-06-13T16:00:49Z","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}]}