{"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-nsvoz5fo","versions":[{"created_at":"2026-06-10T23:01:07Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote20436475 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"c7745e1957dd95b5ce6c5b911e8048e0114a82e3b8f9f3c9b13364b45388fc87","version":9},{"created_at":"2026-06-10T22:01:16Z","element_count":72,"note":"5軸GA polish 56->97 by M5 (autonomous)","saved_by":"mcp","sha256":"ca05de7d625168fdaffe2215092cbdb3ebb1cd733d104b5930d49a8b83fcbdfa","version":3}]}