{"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-oy786u1r","versions":[{"created_at":"2026-06-10T22:58:04Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy65310624→quote22495754 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"44ce38f8f046534d8287a701c6352a8f52f36394e50d2f65a4485ebb36e414f7","version":9},{"created_at":"2026-06-10T19:51:09Z","element_count":68,"note":"5軸GA polish 52->93 by M5 (autonomous)","saved_by":"mcp","sha256":"74fd6aec55334ddf772aacea3882fab8b5089c40f83e78cde21ff6fe07469dcf","version":2}]}