{"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-6crh81si","versions":[{"created_at":"2026-06-11T00:31:35Z","element_count":90,"note":"5軸GA polish 57->97 by M5 (autonomous)","saved_by":"mcp","sha256":"16198c0d77bea3022ddc5436b836ce3a7214cddb466f4c35649abba98202e607","version":15},{"created_at":"2026-06-10T23:10:47Z","element_count":50,"note":"legacy fix: rooms設備語除去 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"88c2df1b506820aa98950d83739bc6663b65f97c43d12636c8e88d2083216b30","version":7}]}