{"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-2zr954lt","versions":[{"created_at":"2026-06-10T22:52:40Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→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":"2befa06996ca2cbc6df0b0ee4ac4c201d4b9ff3ca28693db3da478cc5b7ce00d","version":15},{"created_at":"2026-06-10T15:02:46Z","element_count":85,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"275f57893b7231b31be775cfa1a94d2e2242123010609f27d9a24429454ede66","version":6}]}