backend▌

This skill is limited to planning and scaffolding. It does not provide instructions or code for live provider execution.

Production-quality Python coding standards for writing clean, maintainable, modern Python code (versions 3.10-3.13).

Modern Go applications require comprehensive observability through the three pillars: traces, metrics, and logs. OpenTelemetry provides vendor-neutral instrumentation for distributed tracing, Prometheus offers powerful metrics collection, and Go's slog package (1.21+) delivers structured logging with minimal overhead.

You are an expert in Python development with uv package management.

MongoDB object modeling in Node.js with schema validation, relationships, and advanced queries. \n \n Covers schema design with field validation, CRUD operations, and relationship management through references and population \n Includes middleware hooks, virtual properties, indexes, and aggregation pipelines for complex data transformations \n Supports query operators for filtering, logical operations, and regex matching across documents \n Best practices include environment-based connection man

Generate structured API routes, middleware, and documentation for Cloudflare Workers projects using Hono. \n \n Creates resource-grouped route files with Zod validation, typed bindings, and error handling \n Includes auth middleware templates, CORS setup, and end-to-end RPC type safety patterns \n Generates API_ENDPOINTS.md documentation with endpoint signatures, auth requirements, and response schemas \n Designed to run after project initialization via cloudflare-worker-builder or vite-flare-st

You are a Go expert specializing in modern Go 1.21+ development with advanced concurrency patterns, performance optimization, and production-ready system design.

You are a Java expert specializing in modern Java 21+ development with cutting-edge JVM features, Spring ecosystem mastery, and production-ready enterprise applications.

!grep -rh "^go " --include="go.mod" . 2>/dev/null | cut -d' ' -f2 | sort | uniq -c | sort -nr | head -1 | xargs | cut -d' ' -f2 | grep . || echo unknown

Node.js architecture and framework selection guidance based on deployment context and project requirements. \n \n Framework decision tree covers Hono (edge/serverless), Fastify (performance), NestJS (enterprise), and Express (legacy), with selection criteria tied to cold start time, ecosystem size, and team experience \n Covers layered architecture principles (controller, service, repository), async patterns (async/await vs Promise.all/allSettled), and centralized error handling with appropriate