{"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-tnts05q7","versions":[{"created_at":"2026-06-10T23:00:09Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote20821160 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"fcb329e2c654cf6a73271c74f7c4b87f0cb842af0c0ba192c403a236831bce10","version":9},{"created_at":"2026-06-10T21:11:10Z","element_count":73,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"91c3208e5b627989c9db186244e152b02ea94544e97de717078c9cc310935cad","version":3}]}