Expert .NET backend architect specializing in C#, ASP.NET Core, Entity Framework, Dapper, and enterprise application patterns. Masters async/await, dependency injection, caching strategies, and performance optimization. Use PROACTIVELY for .NET API development, code review, or architecture decisions.
Master C#/.NET backend development patterns for building robust APIs, MCP servers, and enterprise applications. Covers async/await, dependency injection, Entity Framework Core, Dapper, configuration, caching, and testing with xUnit. Use when developing .NET backends, reviewing C# code, or designing API architectures.
Build high-performance async APIs with FastAPI, SQLAlchemy 2.0, and Pydantic V2. Master microservices, WebSockets, and modern Python async patterns. Use PROACTIVELY for FastAPI development, async optimization, or API architecture.
Create production-ready FastAPI projects with async patterns, dependency injection, and comprehensive error handling. Use when building new FastAPI applications or setting up backend API projects.
Official Filesystem Model Context Protocol Server for local file operations.
GraphQL gives clients exactly the data they need - no more, no less. One endpoint, typed schema, introspection. But the flexibility that makes it powerful also makes it dangerous. Without proper controls, clients can craft queries that bring down your server. This skill covers schema design, resolvers, DataLoader for N+1 prevention, federation for microservices, and client integration with Apollo/urql. Key insight: GraphQL is a contract. The schema is the API documentation. Design it carefully.
Next.js App Router principles. Server Components, data fetching, routing 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.
Official Notion Model Context Protocol Server for workspace interaction.
Official PostgreSQL Model Context Protocol Server for database interaction.
Official Puppeteer Model Context Protocol Server for browser automation.
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.
Generate draw.io network diagrams — native .drawio files with CLI export (PNG/SVG/PDF), plus browser-based Mermaid/XML/CSV via MCP server. Use when creating network topology diagrams, generating architecture visuals, exporting diagrams to PNG or PDF, or building draw.io files from discovery data.
OpsMill Infrahub — infrastructure source of truth with versioned branches, schema-driven nodes, GraphQL queries, relationship traversal. Use when querying Infrahub for device inventory, browsing infrastructure schemas, creating a branch for a change proposal, running GraphQL queries against Infrahub, or reconciling Infrahub data with live device state.
JunOS routing operations via pyATS — OSPF/OSPFv3, BGP, route table, MPLS/LDP/RSVP, TED, PFE, ping, traceroute across Juniper devices. Use when checking Juniper OSPF neighbors, viewing BGP summary, inspecting MPLS LSPs, tracing routes, or auditing the JunOS route table.
UML and diagram generation via Kroki — class, sequence, activity, state, component, deployment, network, ER, C4, Mermaid, D2, Graphviz, BPMN, 27+ types. Use when generating a network diagram, creating a sequence diagram, drawing a rack layout, visualizing a protocol state machine, or producing architecture documentation.
Build alternative browser engines using BrowserEngineKit. Use when developing a non-WebKit browser engine for iOS in the EU, managing web content rendering processes, configuring GPU and networking processes for browser functionality, checking device eligibility for alternative engines, or working with BrowserEngineKit entitlements.
Build, review, or improve networking code in iOS/macOS apps using URLSession with async/await, structured concurrency, and modern Swift patterns. Use when working with REST APIs, downloading files, uploading data, WebSocket connections, pagination, retry logic, request middleware, caching, background transfers, or network reachability monitoring. Also use when handling HTTP requests, API clients, network error handling, or data fetching in Swift apps.
Writing queries, mutations, actions, and HTTP actions with proper argument validation, error handling, internal functions, and runtime considerations
