{"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-kd212c9k","versions":[{"created_at":"2026-06-10T22:57:06Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"c9c9203c7c428934260f0c5a713b0e3740e23dea0ce178288a1b75f2f5659631","version":9},{"created_at":"2026-06-10T19:18:38Z","element_count":90,"note":"5軸GA polish 60->96 by M5 (autonomous)","saved_by":"mcp","sha256":"d9605fa75930ddcdcbd4ef9c3d3098edee2c9e592c6193eae51f4bccd7f0bec4","version":2}]}