{"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-jz2z6huf","versions":[{"created_at":"2026-06-10T22:55:34Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy68153976→quote21081401 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"11f6e9afb639de6d0cccbc18e99c663d1142e2eefd8f461dbed492bdfeaab78d","version":10},{"created_at":"2026-06-10T18:13:32Z","element_count":84,"note":"5軸GA polish 56->98 by M5 (autonomous)","saved_by":"mcp","sha256":"e835af8088df2ccd4c40dce1905268e42a9e852f8be48bb19d4ef8e063a2b931","version":3}]}