{"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-nesp58p1","versions":[{"created_at":"2026-06-10T22:57:09Z","element_count":85,"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":"cefddff7bfb7292d575be326db7d6c9bcec952d9305df43f62ffeec2e5d86490","version":9},{"created_at":"2026-06-10T19:18:56Z","element_count":68,"note":"5軸GA polish 60->96 by M5 (autonomous)","saved_by":"mcp","sha256":"abb3d6d1f87443e0fec5d04d663fc71054fcfe0446085479c2f49bf3fd8fbc44","version":2}]}