{"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-rfr5p451","versions":[{"created_at":"2026-06-10T22:59:37Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy54927201→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":"fb022ebdce1dc1ab1f77f104562a29e03230d0449d1d91f2da8c67a1377a1053","version":9},{"created_at":"2026-06-10T20:38:18Z","element_count":89,"note":"5軸GA polish 56->94 by M5 (autonomous)","saved_by":"mcp","sha256":"100452fb157a1a2bab4f432867b82e2bd941a0d9e7b56d3d66e9287fa4bce99d","version":2}]}