{"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-nm6yupuh","versions":[{"created_at":"2026-06-29T19:38:18Z","element_count":90,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"4b0c264d6b79727e3852fef342acf47f477d306821516269591d0ea8253f7aa3","version":3},{"created_at":"2026-06-29T19:25:47Z","element_count":130,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"b612e71f0287586e61ab5a16e8c6b18e589a751b9394bcfae6bd94541c7e2a88","version":2},{"created_at":"2026-06-29T19:25:47Z","element_count":130,"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}]}