{"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-uv2bgf3d","versions":[{"created_at":"2026-06-10T23:05:44Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote20180810 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"2ad48f24e9abe0e82028125f2a1067cdb5f4e636c751ef841399be93d2f78cde","version":9},{"created_at":"2026-06-10T22:17:57Z","element_count":85,"note":"5軸GA polish 58->98 by M5 (autonomous)","saved_by":"mcp","sha256":"852d96fa81d53652e1a3a7b8090925257286584c1654205c295a6a83d0eaac66","version":4}]}