{"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-h5tgof46","versions":[{"created_at":"2026-06-10T22:52:45Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→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":"08750319a32a131796e14f6470e5a79d5208d377fbb57347390e7daf6018a1ab","version":12},{"created_at":"2026-06-10T15:37:18Z","element_count":90,"note":"5軸GA polish 53->98 by M5 (autonomous)","saved_by":"mcp","sha256":"26b6e934690aed60febcc9de4c6b8a4459f4758b85d5cf102eceed0adc1beb4a","version":4}]}