GoodDayOS represents the inaugural AI-driven ERP retail operating system tailored explicitly for Shopify brands, seamlessly integrating inventory management, order processing, supply chain logistics, and accounting functions within the Shopify administration panel. By centralizing purchase orders, vendor coordination, shipping logistics, receiving, transfers, adjustments, and returns, it minimizes manual mistakes and data duplication, while also handling intricate wholesale and pre-book sales orders through real-time connectivity with Shopify, retail point of sale systems, and third-party logistics providers. Additionally, a proactive integrated dataflow layer facilitates bulk editing, customizable fields, and CSV export capabilities, complemented by the GoodDay Sheets App, which allows for effortless synchronization with Google Sheets, automatic data updates, and support for custom scripts. Operational accounting functionalities, such as projected landing costs, three-way matching, and revenue recognition, provide a transparent analysis of budget versus actual expenditures, while GoodAI agents are designed to automate monotonous tasks. This innovative system not only enhances efficiency but also empowers Shopify brands to focus on growth and customer engagement.