{"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-05yuus99","versions":[{"created_at":"2026-07-25T11:54:31Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"86061bd7d484d86bdf3246dfd7d8fe57dff141f63fb0cd3de6a84173d25ddf2e","version":2},{"created_at":"2026-07-25T11:54:23Z","element_count":126,"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}]}