{"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-24g59u1s","versions":[{"created_at":"2026-06-10T22:59:46Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote20180810 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"4760f8e7a6873dbfc63f5656cb9ae1a7cb3f5426982d79fcebd05ab9d81404e0","version":9},{"created_at":"2026-06-10T20:55:06Z","element_count":83,"note":"5軸GA polish 53->98 by M5 (autonomous)","saved_by":"mcp","sha256":"423c5e1b16f6143684b58016b02ff08546c389ae5d35571d8cc75c451907b825","version":3}]}