{"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-xyul9ixc","versions":[{"created_at":"2026-06-10T22:52:43Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote20131232 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"2c8f4ccd25f0d7cc4dfd8aa896433ecf2342be1d1f92decb9b01d399dc717d1b","version":12},{"created_at":"2026-06-10T15:37:17Z","element_count":84,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"10522418dd76d09724d10d671088f8bdb1941a3d0094d4db67067f0704892558","version":4}]}