{"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-jbjbvj9z","versions":[{"created_at":"2026-06-10T22:57:48Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy65310624→quote21237329 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"4f6f4e1863baedf17e49c03a2663a8d91776b01da2710131f32feb2d898a27dd","version":9},{"created_at":"2026-06-10T19:34:24Z","element_count":69,"note":"5軸GA polish 56->93 by M5 (autonomous)","saved_by":"mcp","sha256":"02bdbb9a039da517c13648658127ec0fd9b39de3da9b77f7029f2011a6a6e65b","version":2}]}