{"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-i1t5dpyr","versions":[{"created_at":"2026-06-10T22:57:50Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote23104426 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"20d419864b513aa770e9139788dc1c6b3244ff5e97557b3e23d9a33f64e90db1","version":9},{"created_at":"2026-06-10T19:34:25Z","element_count":84,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"d66d23a4d9912ec5baffb9b61dec5316dfb61a4507c16e6acb95ce4a1ff5c662","version":2}]}