{"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-willowbrookhouse-f01897ed","versions":[{"created_at":"2026-06-25T11:26:18Z","element_count":82,"note":"5軸GA polish 38->92 by M5 (autonomous)","saved_by":"mcp","sha256":"b03e013984271392100a2b802aa11c7f0ee7f7654a50bc8af64304b6395f1f03","version":3},{"created_at":"2026-06-25T11:23:25Z","element_count":82,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"a560d939d864735162ea69f1f93bc92fb76c9a4c2dc06e16cd818a6b86aef5b1","version":2},{"created_at":"2026-06-25T11:23:25Z","element_count":82,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}