What problem does it solve? Building site plugins for Wix business solutions requires coordinating three separate files (custom element, settings panel, extension registration) with strict conventions like kebab-case attributes, UUID generation, and slot placement IDs that are easy to get wrong. ## Core Features & Use Cases - Three-File Plugin Scaffolding: Generates the HTMLElement plugin component, WDS-based settings panel, and extension registration file with correct naming and structure. - Slot Placement Guidance: Provides app definition IDs, widget IDs, and slot IDs for Wix Stores, eCommerce checkout, Bookings, Events, and Blog pages. - Editor Integration Patterns: Covers widget.getProp/setProp bindings, native color and font pickers via @wix/editor, and editor sandboxing workarounds for storage APIs. - Use Case: A developer wants to add a customizable "Best Seller" badge to Wix Stores product pages; this Skill produces the component, settings panel with color pickers, and extension config targeting both old and new Stores versions. ## Quick Start Create a Wix site plugin named best-seller-badge for the product page details slot with a text setting and background color picker.