{"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-fmytldzj","versions":[{"created_at":"2026-06-10T23:06:42Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote19293329 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"3ba6b02723ad20bd928c3716856e74313190179ab11fb1b77829258d2bdec0b3","version":9},{"created_at":"2026-06-10T22:34:54Z","element_count":70,"note":"5軸GA polish 60->95 by M5 (autonomous)","saved_by":"mcp","sha256":"242474d786a30e88ee1f501b2dea4a3a537694181251e5509c4a6a6c8a071806","version":6}]}