{"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-hdj5637x","versions":[{"created_at":"2026-06-10T22:52:42Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy80278800→quote21081401 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"61e4fec91cbef2890f73923c8d60947708449621ac103f350545b5ca9b269b4d","version":13},{"created_at":"2026-06-10T15:19:10Z","element_count":74,"note":"5軸GA polish 52->96 by M5 (autonomous)","saved_by":"mcp","sha256":"315556d2b16dbd01a26ed339f8932e211f06b0ee61941fa4fa4ccb98a95b3272","version":5}]}