> browse/registry

> snipcart

Add e-commerce to any website with Snipcart. Use when a user asks to add a shopping cart to a static site, sell products from a JAMstack site, add buy buttons to any HTML page, or integrate e-commerce without a backend.

> grpc

Build high-performance RPC services with gRPC and Protocol Buffers. Use when a user asks to create gRPC services, define protobuf schemas, implement streaming RPCs, build microservice communication, set up service-to-service calls, implement bidirectional streaming, add interceptors/middleware to gRPC, generate client stubs, handle gRPC errors, implement health checks, configure load balancing, or build gRPC-Web for browser clients. Covers unary, server/client/bidirectional streaming, intercepto

> API Integration Specialist

Expert in integrating third-party APIs with proper authentication, error handling, rate limiting, and retry logic. Use when integrating REST APIs, GraphQL endpoints, webhooks, or external services. Specializes in OAuth flows, API key management, request/response transformation, and building robust API clients.

> supabase

Build applications with Supabase as the backend — Postgres database, authentication, real-time subscriptions, storage, and edge functions. Use when someone asks to "set up Supabase", "add authentication", "create a real-time app", "set up row-level security", "configure Supabase storage", "write edge functions", or "migrate from Firebase to Supabase". Covers project setup, schema design with RLS, auth flows, real-time subscriptions, file storage, and edge functions.

> xano

Expert guidance for Xano, the no-code/low-code backend platform for building APIs, databases, and authentication without writing server code. Helps developers and non-technical builders create production-ready REST APIs with visual function stacks, manage data models, and integrate with frontend frameworks.

> istio

Istio service mesh for Kubernetes traffic management, security, and observability. Use when the user needs to configure traffic routing, mTLS, circuit breaking, fault injection, or observability for microservices.

> schemathesis

Automatically test APIs by generating test cases from OpenAPI/GraphQL schemas. Use when tasks involve API fuzzing, finding edge cases in REST or GraphQL APIs, testing schema compliance, generating property-based tests from API specs, finding crashes and 500 errors, or validating API contracts. Schemathesis generates thousands of test cases from your schema and finds bugs that manual testing misses.

> dvc

Data Version Control for ML projects. Track large datasets and models alongside Git, build reproducible ML pipelines, and run experiments with metric comparison. Works with any storage backend including S3, GCS, Azure, and local filesystems.

> n8n-self-host

Self-host, configure, scale, and manage n8n instances. Use when a user asks to install n8n with Docker, set up n8n in production, configure n8n environment variables, scale n8n with workers, back up n8n workflows, restore n8n data, manage n8n via CLI or REST API, monitor n8n, troubleshoot n8n issues, set up n8n with PostgreSQL, or deploy n8n with a reverse proxy. For designing n8n workflows and nodes, see n8n-workflow.

> urql

You are an expert in urql, the highly customizable and lightweight GraphQL client for React, Vue, Svelte, and vanilla JavaScript. You help developers fetch GraphQL data with minimal bundle size, document caching, normalized caching via Graphcache, exchanges (middleware pipeline), subscriptions, and offline support — providing a leaner alternative to Apollo Client with better extensibility.

> viem

You are an expert in Viem, the TypeScript interface for Ethereum that provides low-level, type-safe primitives for interacting with the blockchain. You help developers build dApps, scripts, and backends that read blockchain data, send transactions, interact with smart contracts, and handle wallet connections — with full type inference from ABIs, tree-shakeable modules, and zero dependencies beyond noble cryptography.

> ibis

Expert guidance for Ibis, the Python dataframe library that provides a pandas-like API but generates SQL for execution on any backend — DuckDB, PostgreSQL, BigQuery, Snowflake, Spark, and more. Helps developers write analytics code once and run it anywhere without rewriting SQL for each database.

> medusa

Build headless e-commerce backends with Medusa.js. Use when a user asks to build an online store backend, create a headless e-commerce platform, set up product management and checkout, build a custom storefront, add payment processing to an e-commerce app, manage inventory and orders, or replace Shopify with an open-source alternative. Covers products, carts, orders, payments (Stripe), shipping, plugins, and Next.js storefront integration.

> encore

Build cloud backend applications with Encore — type-safe backend framework with built-in infrastructure. Use when someone asks to "build a backend", "Encore", "type-safe API framework", "backend with built-in infra", "auto-provision cloud resources", or "backend framework with databases built-in". Covers API definition, databases, pub/sub, cron, and auto-provisioned infrastructure.

> go-echo

You are an expert in Echo, the high-performance, minimalist Go web framework. You help developers build REST APIs and web applications using Echo's optimized router, middleware chain, data binding, validation, template rendering, and WebSocket support — providing a clean API surface with excellent performance and comprehensive built-in middleware.

> pact

When the user wants to implement consumer-driven contract testing between microservices using Pact. Also use when the user mentions "pact," "contract testing," "consumer-driven contracts," "CDC testing," "provider verification," or "Pact Broker." For API mocking, see mockoon or wiremock.

> graphql-yoga

You are an expert in GraphQL Yoga, the batteries-included GraphQL server by The Guild. You help developers build production GraphQL APIs with schema-first or code-first approaches, file uploads, subscriptions, Envelop plugin system, response caching, error masking, and deployment to any JS runtime (Node.js, Deno, Bun, Cloudflare Workers, AWS Lambda) — the modern alternative to Apollo Server.

> golang-security

Secure Go backend services against common vulnerabilities. Use when implementing input validation, crypto, or SQL injection prevention in Go. (triggers: crypto/rand, argon2, sanitize, jwt, bcrypt, validation, input validation, sql injection)

> ros2-web-integration

Patterns and best practices for integrating ROS2 systems with web technologies including REST APIs, WebSocket bridges, and browser-based robot interfaces. Use this skill when building web dashboards for robots, streaming camera feeds to browsers, exposing ROS2 services as REST endpoints, or implementing bidirectional WebSocket communication between web UIs and ROS2 nodes. Trigger whenever the user mentions rosbridge, rosbridge_suite, roslibjs, FastAPI with ROS2, Flask with rclpy, WebSocket for r

> nodejs-backend-patterns

Build production-ready Node.js backend services with Express/Fastify, implementing middleware patterns, error handling, authentication, database integration, and API design best practices. Use when creating Node.js servers, REST APIs, GraphQL backends, or microservices architectures.