Apply when choosing which VTEX IO authentication token should back a request from a backend app. Covers ctx.authToken, ctx.storeUserAuthToken, ctx.adminUserAuthToken, authMethod, and how requester context should determine the identity used by VTEX clients. Use for deciding which identity talks to VTEX endpoints in…
Apply when designing or implementing how a VTEX IO backend app integrates with VTEX services or external APIs through @vtex/api and @vtex/clients. Covers choosing the correct client type, registering clients in IOClients, configuring InstanceOptions, and consuming integrations through ctx.clients. Use for custom…
Apply when deciding where and how a VTEX IO app should store and read data. Covers when to use app settings, configuration apps, Master Data, VBase, VTEX core APIs, or external stores, and how to avoid duplicating sources of truth or abusing configuration stores for operational data. Use for new data flows, caching…
Apply when designing or implementing asynchronous processing in VTEX IO services through events, workers, and background handlers. Covers event handler structure, idempotency, retry-safe processing, and moving expensive work out of request-response routes. Use for event-driven integrations, delayed processing, or…
Apply when working with GraphQL schema files in graphql/ or implementing resolvers in node/resolvers/ for VTEX IO apps. Covers schema.graphql definitions, @cacheControl and @auth directives, custom type definitions, and resolver registration in the Service class. Use for exposing data through GraphQL queries and…
Apply when designing or implementing HTTP endpoints exposed by a VTEX IO backend service. Covers route boundaries, handler structure, middleware composition, request validation, and response modeling for service.json routes. Use for webhook endpoints, partner integrations, callback APIs, or reviewing VTEX IO handlers…
Apply when deciding whether and how VTEX IO apps should use Master Data v2 for custom data. Covers entity boundaries, schema lifecycle, indexing strategy, and when Master Data is the right storage mechanism versus another data approach. Use for reviews, wishlists, forms, or other custom data modeling decisions in VTEX…
Apply when working with MasterData v2 entities, schemas, or MasterDataClient in VTEX IO apps, or when anyone designing or implementing a solution must scrutinize whether Master Data is the correct storage. The skill prompts hard questions: native Catalog or other VTEX stores, OMS, or an external database may be…
Apply when implementing localization and translated copy in VTEX IO apps. Covers the messages builder, /messages/.json, context.json, frontend message usage, and how VTEX apps integrate with vtex.messages for runtime translation. Use for storefront, admin, or backend flows that should use VTEX IO message…
Apply when making VTEX IO services easier to observe, troubleshoot, and operate in production. Covers metrics, structured logging, failure visibility, rate-limit awareness, and production readiness checks for backend apps. Use for integration monitoring, error diagnosis, or improving the operational quality of VTEX IO…
Apply when controlling access to VTEX IO app resources using role-based or resource-based policies. Covers policies.json for role-based access control, service.json policies for resource-based access, VRN syntax for principals, the difference between app-to-app and user/integration access, and GraphQL @auth…
Apply when building React components under react/ or configuring store blocks in store/ for VTEX IO apps. Covers interfaces.json, contentSchemas.json for Site Editor, VTEX Styleguide for admin apps, and css-handles for storefront styling. Use for creating custom storefront components, admin panels, pixel apps, or any…
Apply when connecting React components to Store Framework blocks and render-runtime behavior in VTEX IO. Covers interfaces.json, block registration, block composition, and how storefront components become configurable theme blocks. Use for block mapping, theme integration, or reviewing whether a React component is…
Apply when building VTEX IO apps that must work correctly in multi-binding stores where bindings use path prefixes (e.g. store.com/us/, store.com/br/). Covers rootPath extraction from x-vtex-root-path header, useRuntime().rootPath in React, URL construction in backends, link generation, asset paths, and API route…
Apply when reviewing or designing security-sensitive boundaries in VTEX IO apps. Covers public versus private exposure, trust assumptions at route and integration boundaries, sensitive data handling, validating what crosses the app boundary, and avoiding leakage across accounts, workspaces, users, or integrations. Use…
Apply when building backend service apps under node/ in a VTEX IO project or configuring service.json routes. Covers the Service class, middleware functions, ctx.clients pattern, JanusClient, ExternalClient, MasterDataClient, and IOClients registration. Use for implementing backend APIs, event handlers, or…
Apply when designing VTEX IO configuration apps with the configuration builder or when a service app must receive structured configuration through runtime context. Covers the separation between service apps and configuration apps, schema.json and configuration.json, settingsType, and reading injected configuration…
Apply when defining service.json routes, choosing public vs segment vs private URL prefixes for VTEX IO services, or setting HTTP cache headers that interact with the VTEX edge and CDN. Covers path patterns, cookie visibility, edge caching behavior, and aligning Cache-Control with data sensitivity. Use for Node or…
Apply when designing or implementing the runtime structure of a VTEX IO backend app under node/. Covers the Service entrypoint, typed context and state, service.json runtime configuration, and how routes, events, and GraphQL handlers are registered and executed. Use for structuring backend apps, defining runtime…
Apply when building VTEX IO storefront components under react/ for Store Framework experiences. Covers storefront component structure, css-handles, storefront context hooks, browser-safe data fetching, and how components should behave when used as theme blocks. Use for custom storefront UI, product widgets, banners…
Apply when designing or modifying a VTEX IO storefront theme app — the app that owns store/blocks.json, store/routes.json, store/templates/, store/contentSchemas.json, and the storefront page tree assembled from store.home, store.product, store.search, store.custom, and other native page templates. Covers how a theme…
Apply when installing, publishing, upgrading, or rolling back a VTEX IO storefront theme app (vendor.store-theme or any app that owns store/blocks.json, store/routes.json, and store/contentSchemas.json). Covers how Site Editor and theme content are scoped by the app's MAJOR version, why a major version bump leaves the…
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