{"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-hel3sgv5","versions":[{"created_at":"2026-06-10T23:00:47Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72844800→quote23910325 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"a8984d9a07b7836b3fd08d68394db3b5e0e6af7c9cd3d453c462b8fe6dba65b4","version":9},{"created_at":"2026-06-10T21:44:00Z","element_count":74,"note":"5軸GA polish 59->95 by M5 (autonomous)","saved_by":"mcp","sha256":"8a04e9e6ccc28223e45b2e99f51f59ca1249d3032f23d4eb88e2e62666851edf","version":3}]}