{"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-2ciqcmwj","versions":[{"created_at":"2026-06-25T07:21:04Z","element_count":83,"note":"5軸GA polish 45->96 by M5 (autonomous)","saved_by":"mcp","sha256":"5584b1515141b9202e1ddaaf1f9e014a9491c563b3406a5102ffa49477836771","version":3},{"created_at":"2026-06-25T07:15:38Z","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":"2268215118d29d5377e4cce6138aed5095bded18ebb20d519e78cdf052a31aee","version":2},{"created_at":"2026-06-25T07:15:38Z","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}]}