Develop Apps & Modules

Load automatically when planning, researching, or implementing ANY Medusa backend features (custom modules, API routes, workflows, data models, module links, business logic). REQUIRED for all Medusa backend work in ALL modes (planning, implementation, exploration). Contains architectural patterns, best practices, and critical rules that MCP servers don't provide.

Load automatically when planning, researching, or implementing Medusa Admin dashboard UI (widgets, custom pages, forms, tables, data loading, navigation). REQUIRED for all admin UI work in ALL modes (planning, implementation, exploration). Contains design patterns, component usage, and data loading patterns that MCP servers don't provide.

Load automatically when planning, researching, or implementing Medusa storefront features (calling custom API routes, SDK integration, React Query patterns, data fetching). REQUIRED for all storefront development in ALL modes (planning, implementation, exploration). Contains SDK usage patterns, frontend integration, and critical rules for calling Medusa APIs.

Add or modify WooCommerce backend PHP code following project conventions. Use when creating new classes, methods, hooks, or modifying existing backend code. **MUST be invoked before writing any PHP unit tests.**

Create a new Magento 2 module in app/code/. This skill should be used when the user wants to create a module, scaffold a new module, generate module boilerplate, or set up a custom module. It handles registration.php, composer.json, module.xml generation with configurable dependencies. Trigger phrases include "create module", "new module", "scaffold module", "generate module".

Dump all Hyvä CMS components from active modules. This skill should be used when the user wants to list all CMS components, view available components, debug component configurations, or see the merged components.json output. Trigger phrases include "list cms components", "dump components", "show all components", "view cms components", "components.json dump".

Expert patterns for Shopify app development including Remix/React Router apps, embedded apps with App Bridge, webhook handling, GraphQL Admin API, Polaris components, billing, and app extensions. Use when: shopify app, shopify, embedded app, polaris, app bridge.

Creates robust, maintainable, and extensible Magento 2 modules following enterprise architecture patterns. Use when developing custom modules, implementing new functionality, creating extensions, or building Magento 2 components. Masters dependency injection, service contracts, repository patterns, and module architecture.

Builds sophisticated admin interfaces and frontend components using Magento's UI Component framework. Use when creating admin grids, forms, modals, or data-driven interfaces. Masters XML configuration, KnockoutJS templates, data providers, and complex form/grid implementations.

Designs and implements data layer architecture for Magento 2. Use when creating data models, designing database schemas, implementing repositories, or working with EAV/flat table structures. Masters entity design, repository patterns, collections, and database optimization.

Manages seamless Magento 2 version upgrades and migrations. Use when upgrading Magento versions, migrating from Magento 1, planning upgrade strategies, assessing compatibility, or handling breaking changes. Masters upgrade planning, compatibility assessment, and post-upgrade optimization.

Implements business requirements as scalable, maintainable Magento 2 features. Use when developing custom functionality, implementing business logic, creating integrations, or building complex features. Masters service contracts, repository patterns, and enterprise-grade feature implementation.

Implements scheduled tasks and background processing for Magento 2. Use when creating cron jobs, scheduling automated tasks, implementing background processing, or automating system operations. Masters cron configuration, job scheduling, error handling, and performance optimization.

Specialized agent for MedusaJS development including custom modules, API routes, data models, workflows, scheduled jobs, and third-party integrations. Provides expert guidance on commerce platform architecture and plugin development.

Expert patterns for Shopify app development including Remix/React Router apps, embedded apps with App Bridge, webhook handling, GraphQL Admin API, Polaris components, billing, and app extensions. Use when "shopify app, shopify, embedded app, polaris, app bridge, shopify webhook, shopify, ecommerce, apps, embedded-apps, polaris, app-bridge" mentioned.

Saleor e-commerce entity types, relationships, and identifier rules. Use when asking about how entities relate, slug vs name identification, channels, or what Configurator manages.

Creates new Saleor entity types with complete implementation. Use when implementing new entities, adding modules, writing GraphQL operations, bulk mutations, deployment stages, Zod schemas for entities, or creating features that interact with Saleor API.

Use when starting a new WooCommerce extension, setting up plugin headers, checking WooCommerce availability, declaring HPOS and block checkout compatibility with FeaturesUtil, or understanding WooCommerce extension architecture. Covers Requires Plugins header, WC requires at least, WC tested up to, before_woocommerce_init, declare_compatibility for custom_order_tables and cart_checkout_blocks, plugins_loaded initialization, class_exists WooCommerce check, and Interactivity API store privacy (lock true).

Create Business Manager extension cartridges for B2C Commerce. Use when building admin tools, BM menu items, or custom BM pages (bm_* cartridges). Covers bm_extensions.xml, menu items, dialog actions, and form extensions.

Comprehensive patterns for building Shopify apps with Go backend (Fiber v3) - OAuth, webhooks, GraphQL/REST APIs, App Bridge, and GDPR compliance

Work with ISML templates in B2C Commerce. Use when writing storefront templates, using isprint/isset/isloop tags, understanding ISML expressions (${...}), or creating custom template modules. Covers tag syntax, expression language, and template includes.

Implement hooks using HookMgr and extension points in B2C Commerce. Use when extending OCAPI/SCAPI behavior, handling system events like order calculation, or registering custom hook implementations. Covers hooks.json, dw.ocapi hooks, and custom extension points.

Create forms with validation in SFRA patterns for B2C Commerce. Use when building checkout forms, account forms, or any form with field definitions, validation rules, and error handling. Covers form XML definitions, server-side validation, and template rendering.

Work with custom objects in B2C Commerce using Script API and OCAPI. Use when storing custom business data, querying custom objects, implementing data persistence, or creating site-scoped or global data stores. Covers CustomObjectMgr, OCAPI Data API, search queries, and Shopper Custom Objects API.

Generate B2C Commerce cartridges, controllers, hooks, custom APIs, job steps, and Page Designer components from scaffold templates. Use when starting a new cartridge, adding a controller to an existing cartridge, creating hook implementations, bootstrapping custom API endpoints, or generating job steps and Page Designer components.

Provides comprehensive SAP Commerce Cloud (formerly Hybris) development guidance including type system modeling, service layer architecture, data management with ImpEx and FlexibleSearch, OCC API customization, B2C/B2B accelerator patterns, CronJobs, business processes, Solr search, promotions, caching, and Backoffice configuration. Use when the user asks to "create SAP Commerce extensions", "define item types in items.xml", "write ImpEx scripts", "implement service layer components (facades/services/DAOs)", "customize OCC REST APIs", "work with FlexibleSearch queries", "customize B2C or B2B accelerators", "configure Spring beans", "create CronJobs or scheduled tasks", "define business processes or order flows", "configure Solr search or indexing", "set up promotions or coupons", "configure caching", "customize Backoffice", mentions "Hybris development" or "SAP Commerce Cloud platform", or asks about troubleshooting SAP Commerce issues.

Generate an offline-first Progressive Web App with Odoo Studio backend integration. Use when user wants to create new Odoo-backed application, mentions "PWA with Odoo", "offline Odoo app", "Odoo Studio PWA", or similar terms. Supports SvelteKit, React, and Vue frameworks.

Add integration for an additional Odoo Studio model to an existing Odoo PWA project. Use when user wants to add support for another model, mentions "add new model", "integrate another Odoo model", or similar.

Creates complete Odoo 16.0 modules with proper structure, manifests, models, views, and security. This skill should be used when the user requests creation of a new Odoo module, such as "Create a new module for inventory tracking" or "I need a new POS customization module" or "Generate module structure for vendor management".

Guide for creating backend logic using Shopify Functions (Discounts, Shipping, Payment, etc.). Covers WASM, Rust/JavaScript (Javy) implementation, and input queries.

Guide for using Shopify App Bridge to embed apps in the Shopify Admin. Use this skill when the user needs to interact with the host interface (Admin), show toasts, modals, resource pickers, or handle navigation within a Shopify embedded app.

Strategies for deploying Shopify Apps. Focus on overcoming Vercel/Serverless timeouts, using VPS (Coolify/Dokku), and handling long-running background jobs.

Use when adding a new environment variable to an app.

Creates a frontend controller action in Magento 2 for the storefront. Use when building custom frontend pages, AJAX endpoints, form submission handlers, or API-like endpoints for JavaScript.

Creates a backend (adminhtml) controller action in Magento 2 with proper ACL, routing, authorization, and admin UI integration. Use when building admin pages, AJAX endpoints, form handlers, or mass actions.

Build ecommerce applications with Medusa v2 - commerce modules, customization, workflows, and deployment

Custom Shopify app development using Shopify CLI, app architecture, OAuth authentication, app extensions, admin UI, Hydrogen/Remix frameworks, and deployment. Use when creating Shopify apps, setting up Shopify CLI, building app extensions, implementing OAuth flows, creating admin UI components, working with Hydrogen or Remix, deploying to Cloudflare Workers, or integrating third-party services with Shopify stores.