{"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-juwjlm1d","versions":[{"created_at":"2026-07-13T09:54:01Z","element_count":90,"note":"5軸GA polish 43->97 by M5 (autonomous)","saved_by":"mcp","sha256":"da093a55e61579e08b2c6a02318cad1fac8942f347fa7c2e04437d7cc81f8260","version":3},{"created_at":"2026-07-13T09:48:31Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"d549a6ede8599a9cb3f49a092c81aaa11ef6375e0ab8a9345d2a9542916ad6e8","version":2},{"created_at":"2026-07-13T09:48:31Z","element_count":105,"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}]}