{"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-fh4w79fj","versions":[{"created_at":"2026-06-10T23:10:49Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote21396472 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"996efc784e7fc1be9eb13655c79b84dad7e5b450e6523802b693d88cf48fab4f","version":12},{"created_at":"2026-06-10T15:53:07Z","element_count":83,"note":"5軸GA polish 51->98 by M5 (autonomous)","saved_by":"mcp","sha256":"672c8ff73426ef4320eeaa082c27d29f2797765faf267b20e569bcb22409ede8","version":4}]}