Backend Service Apps & API Clients When this skill applies Use this skill when developing a VTEX IO app that needs backend logic — REST API routes, GraphQL resolvers, event handlers, scheduled tasks, or integrations with VTEX Commerce APIs and external services. - Building the Service entry point ( ) with typed context, clients, and state - Creating and registering custom clients extending JanusClient or ExternalClient - Using to access clients with built-in caching, retry, and metrics - Configuring routes and middleware chains in service.json Do not use this skill for: - Manifest and builder…