B2B Quote Pipeline is a production-grade WooCommerce plugin that introduces a complete, structured quoting workflow into any WooCommerce store. It addresses a fundamental gap in WooCommerce’s feature set: the platform is built for consumer retail, but many businesses that run on WooCommerce sell to other businesses, wholesalers, distributors, contractors, and institutional buyers, who expect the ability to negotiate pricing before committing to a purchase.   The plugin provides an 8-stage Kanban pipeline that mirrors the lifecycle of a real B2B sales deal: from the initial customer request, through admin review and pricing, into negotiation rounds, and finally to acceptance and order conversion. Every stage transition is tracked, logged, and communicated to both parties via a configurable transactional email system.   Unlike third-party quoting tools that operate outside WooCommerce and require manual data re-entry, B2B Quote Pipeline integrates directly into WooCommerce. Accepted quotes are converted to live WooCommerce orders in a single click, preserving product data, customer data, quoted prices, and order history in the native WooCommerce system.   The plugin is architected with PSR-4 namespacing, PHP 8.1 strict types, a full REST API, HPOS compatibility, and Action Scheduler integration for automated quote expiry. It is designed to be maintainable, extensible, and performance-safe on high-volume stores.