{"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-xbe6ckkh","versions":[{"created_at":"2026-06-10T23:06:27Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote21259834 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"707a37dc326a07e6bb4d162d3792c9852024c9ce154315adb71c6742fc1d2de7","version":9},{"created_at":"2026-06-10T22:35:12Z","element_count":72,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"1f9953a0505bdf64aa5dc879c8887289e970f783583887c0c2c2c3cec9f03950","version":6}]}