{"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-qr6l7njn","versions":[{"created_at":"2026-06-10T22:53:03Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy50261601→quote22616301 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"d7a1b6be4c8cda110bb30746bc2af1740c61cb32fb87ec3fb742333830eced04","version":10},{"created_at":"2026-06-10T16:39:29Z","element_count":88,"note":"5軸GA polish 60->94 by M5 (autonomous)","saved_by":"mcp","sha256":"bf5d5573b31307ec85b74978500b61194814219cf5ac39de04a4ae2ceea0fd22","version":2}]}