{"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-willowcreekhouse-gzppuhpa","versions":[{"created_at":"2026-06-13T19:45:39Z","element_count":89,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"3c0e1c423cd33e1b4c2714b18c56bdd4631750452adb0d9be4970574ae4839af","version":3},{"created_at":"2026-06-13T19:23:36Z","element_count":134,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"437f1f6d4d588715a291315d5b7e095af93354a552731da254b55660694a75c5","version":2},{"created_at":"2026-06-13T19:23:34Z","element_count":134,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}