{"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-ooowu8hi","versions":[{"created_at":"2026-06-13T19:45:37Z","element_count":90,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"44b26efa9293d99bd1f709ad118d824a7e95aa0edc35ca11281a8e6ee718f524","version":3},{"created_at":"2026-06-13T19:39:57Z","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":"0a9f34d69fc4afe8c7f1cdbb4231dc30dde24794559eec8975306035062cb634","version":2},{"created_at":"2026-06-13T19:39:56Z","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}]}