Generates a TikTok Catalog Manager product feed from your OpenCart 4 catalogue as CSV: sku_id, title, description, availability, condition, price, sale_price, link, image_link, additional_image_link (up to 10 URLs), brand and google_product_category. Cells are quoted per RFC4180 and any cell starting with =, +, - or @ is prefixed so a merchant opening the file in Excel or Google Sheets never executes it. The file is written with a UTF-8 BOM and CRLF line endings. SKUs are read from OpenCart 4.1's product_code table and from the legacy product columns, whichever the schema actually has. Specials come from product_discount rows, prices are converted into the feed currency and can include tax, and products are read from the database in batches of 250 straight to a temp file that is atomically renamed, so large catalogues do not exhaust memory. The feed route is guarded by a token and returns 404 without it. Setting up the catalog and the scheduled import happens in TikTok Catalog Manager.