{"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-4lr9ucr4","versions":[{"created_at":"2026-06-10T23:06:37Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote20790328 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"ab767209adb4a2bb73208ab77c5f46cbd49161d9a5bc021684433241ba1826fe","version":9},{"created_at":"2026-06-10T22:35:05Z","element_count":83,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"bb80ae86b6eace3f2a76b6c161629d8e5cd9c4a85cf89c5151fda8d939d914b6","version":6}]}