{"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-30643rds","versions":[{"created_at":"2026-06-20T06:12:37Z","element_count":89,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"f7ce1295ab2b384f146aa5ee58c57bc6dca367b1666c36e63c3149ebdf81f9ef","version":3},{"created_at":"2026-06-20T06:07:33Z","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":"e535dc59edf50f94e8bb711e15a526edf77fa5022dfbe83eb33e5e9288a53669","version":2},{"created_at":"2026-06-20T06:07:30Z","element_count":105,"note":"言葉から生成: LDK+主寝室+子供室+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}