Total 50,527 skills, Backend Development has 4135 skills
Showing 12 of 4135 skills
Create MCP servers using the C# SDK and .NET project templates. Covers scaffolding, tool/prompt/resource implementation, and transport configuration for stdio and HTTP. USE FOR: creating new MCP server projects, scaffolding with dotnet new mcpserver, adding MCP tools/prompts/resources, choosing stdio vs HTTP transport, configuring MCP hosting in Program.cs, setting up ASP.NET Core MCP endpoints with MapMcp. DO NOT USE FOR: debugging or running existing servers (use mcp-csharp-debug), writing tests (use mcp-csharp-test), publishing or deploying (use mcp-csharp-publish), building MCP clients, non-.NET MCP servers.
Commet behavior rules and business logic. Use when implementing billing features, subscription changes, plan changes, proration, pricing, credits, balance, intro offers, or any billing edge case. Contains detailed rules for how changes affect customers.
Create and sign JSON Web Tokens (JWTs) for testing and development. Use when the user wants to generate, create, build, or sign a JWT — e.g. "create a JWT", "generate a test token", "sign this payload", "make a JWT with these claims", "build an access token". Supports HMAC, RSA, and ECDSA algorithms.
Go implementation guide for PMA-managed service and CLI projects. Covers project layout (cmd/internal), strict linting with golangci-lint v2, database access (sqlc + pgx or GORM), HTTP patterns (stdlib + Chi or Gin), layered config with koanf, structured logging with slog, OpenTelemetry observability, and CI quality gates.
Implement web service integrations in B2C Commerce using LocalServiceRegistry. Use when calling external APIs, configuring service credentials in services.xml, handling HTTP requests/responses, or implementing circuit breakers. Covers HTTP, SOAP, FTP, and SFTP services.
Develop Custom SCAPI endpoints for B2C Commerce. Use when creating REST APIs, defining api.json routes, writing schema.yaml (OAS 3.0), or building headless commerce integrations. Covers cartridge structure, endpoint implementation, and OAuth scope configuration.
Apply when designing, or implementing a Payment Connector in VTEX IO. Covers PPF implementation in VTEX IO, use of secure proxy, manifest and other PPP routes exposure and clients definitions. Use for any implementation of a Payment Connector hosted in VTEX IO.
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 through ctx.vtex.settings. Use for shared service configuration, decoupled configuration lifecycle, or reviewing whether app settings should be replaced by a configuration app.
Use for building and operating Ignis projects with ignis-cli, ignis-sdk, ignis.toml, SQLite, service build/publish/deploy, and example-driven project setup.
Integrate PayPal payment processing with support for express checkout, subscriptions, and refund management. Use when implementing PayPal payments, processing online transactions, or building e-commerce checkout flows.
Nest.js framework expert specializing in module architecture, dependency injection, middleware, guards, interceptors, testing with Jest/Supertest, TypeORM/Mongoose integration, and Passport.js authentication. Use PROACTIVELY for any Nest.js application issues including architecture decisions, testing strategies, performance optimization, or debugging complex dependency injection problems. If a specialized expert is a better fit, I will recommend switching and stop.
Guide for building GraphQL servers with Apollo Server 5.x. Use this skill when: (1) setting up a new Apollo Server project, (2) writing resolvers or defining GraphQL schemas, (3) implementing authentication or authorization, (4) creating plugins or custom data sources, (5) troubleshooting Apollo Server errors or performance issues.