{"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-0zmbfl4l","versions":[{"created_at":"2026-06-10T22:59:32Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote20863604 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"be404f702c10d2c2d6fd51d679b588fa6938ea26b68cc799fb90ea46924ff971","version":9},{"created_at":"2026-06-10T20:38:24Z","element_count":91,"note":"5軸GA polish 56->98 by M5 (autonomous)","saved_by":"mcp","sha256":"219ebbc5c5c1f30dc547d0a627928bf524785cb9bcf159b9458144d3319b379b","version":2}]}