A detailed technical guide for engineering teams migrating from Magento (Adobe Commerce) to VTEX, covering the three architectural decisions to make before starting, what data migrates cleanly via the VTEX Catalog API, what breaks or needs custom work, and how to sequence the project. Key topics include the strict Category→Brand→Product→SKU insertion order in the VTEX Catalog API, the attribute set mapping gap, why order history must be treated as a read-only archive rather than a live OMS import, a step-by-step SEO 301 redirect strategy for Magento's URL structure differences, how to build a functional gap register for Magento extensions (30-40% have no direct VTEX equivalent), and a realistic 10-20 week timeline. The August 11, 2026 Adobe Commerce 2.4.5 extended support end date is flagged as a hard deadline driving urgency.
