{"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-omp5nq2q","versions":[{"created_at":"2026-06-10T23:06:31Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75991608→quote22495754 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"d2b3f5df99cb44245a027a9e0401ae3ab2454a342084cc7b9c0d4cb2077457eb","version":9},{"created_at":"2026-06-10T22:35:15Z","element_count":90,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"a3fcc27594b5c5838c47966ecb25a92e0a0b67393e8cfff523d105fd4d060224","version":6}]}