{"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-4ekkhlql","versions":[{"created_at":"2026-06-10T23:01:18Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote21673268 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"685b716d2ae4f786cc0d3fd65dcf606f0ab6c940fcfaff390966814a1c49afb7","version":9},{"created_at":"2026-06-10T22:01:15Z","element_count":91,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"9a2804fd7e527ed9f05d5be08a78c72ed1b7423e3305542e6083cfc1c0bd3fbb","version":3}]}