{"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-vlz9pt0r","versions":[{"created_at":"2026-06-10T22:54:32Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote19805192 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"61dded55f20a9e07725f2f3ebbefa2f7829e99195d2627150cb4f571aa8cb036","version":10},{"created_at":"2026-06-10T17:39:33Z","element_count":90,"note":"5軸GA polish 56->98 by M5 (autonomous)","saved_by":"mcp","sha256":"894e0d4aad4451840486e8a3ca2499804966726175eb9d9b42c89cbc2bbe4816","version":3}]}