{"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-whitecityviewhouse-1t7pui77","versions":[{"created_at":"2026-06-25T17:35:15Z","element_count":88,"note":"5軸GA polish 38->92 by M5 (autonomous)","saved_by":"mcp","sha256":"5951d2f5965fed9223cf02230b8271f0c19bf3bb2e9b96ac5225feceaab9500c","version":3},{"created_at":"2026-06-25T17:33:23Z","element_count":101,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"160e54194dc5a74053ac4a23b2866b2fb24a8c2ad21047296e5c5775b40f05bb","version":2},{"created_at":"2026-06-25T17:33:23Z","element_count":101,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}