Backend and APIs: skills, plugins, subagents, slash commands and mcp servers

auth-implementation-patterns Seth Hobson skill A skill for designing authentication and authorization: JWT, OAuth2, sessions, roles. Useful when you build a login flow or fix an access bug. Claude Code CX Codex Cursor 19,388installs data-manager-api-setup official google skill This skill sets up Data Manager API access and client libraries. Use it when preparing a local environment before building an API integration. Claude Code Gemini CLI CX Codex 6,109installs fullstack-developer VoltAgent Community subagent This subagent carries a feature across the database, API, and frontend layers. Use it when one change needs a consistent end-to-end implementation. Claude Code 18,117installs laravel-specialist https://github.com/Jeffallan skill Configures the agent for Laravel 10+ and PHP 8.2+ development. It guides Eloquent modeling, Horizon queues, API resources, and Pest testing. Claude Code CX Codex Cursor +1 23,300installs data-manager-api-audience-ingestion official google skill This skill guides developers through adding members to Google audiences, removing them, or clearing an audience with the Data Manager API. Use it for Customer Match and mobile device ID audiences. Claude Code Gemini CLI CX Codex 6,041installs dotnet-backend-patterns Seth Hobson skill Skill for C# and .NET development: patterns for async code, dependency injection, Entity Framework Core, caching, and testing. Use when building backend APIs, MCP servers, or reviewing C# code. Claude Code CX Codex Cursor 19,076installs google-cloud-solution-architecture official google skill This skill gathers requirements and designs complex Google Cloud systems. Use it for new cloud workloads, migrations, and multi-product architecture work. Claude Code Gemini CLI CX Codex 5,980installs eve vercel skill eve is a filesystem-first framework for durable backend agents, where code lives as files on disk. This skill helps you create, edit, and debug agents: instructions, skills, tools, connections, channels, subagents, schedules, and evals. Claude Code CX Codex Cursor +1 7,400installs async-python-patterns Seth Hobson skill This skill guides async Python work with asyncio, async/await, and concurrent tasks. Use it for APIs and applications with many I/O-bound operations. Claude Code CX Codex Cursor 18,055installs flutter-use-http-package flutter skill This skill shows how to send GET, POST, PUT, and DELETE requests with Flutter's http package and handle JSON responses. Use it when an app needs to read from or write to a REST API. Claude Code CX Codex Cursor +1 36,000installs google-ads-api-account-diagnostics official google-ads-api-team skill This skill helps investigate falling conversions, low lead volume, and lost Google Ads impressions caused by budget, bids, or ad rank. Claude Code Gemini CLI CX Codex 5,508installs google-cloud-global-frontend-configuration official google skill This skill guides design and deployment of a Google Cloud global external Application Load Balancer. Use it for CDN, WAF, and Service Extensions setup. Claude Code Gemini CLI CX Codex 5,300installs gemini-live-api official google skill This skill generates a Gemini LiveAPI client for bidirectional WebSocket exchange. Use it when a project needs session handling, authentication, and streaming input or output. Claude Code Gemini CLI CX Codex 5,200installs openapi-spec-generation Seth Hobson skill Creates and maintains OpenAPI 3.1 specs from code or design-first contracts. Use it for API docs, SDK generation, and contract checks. Claude Code CX Codex Cursor 16,374installs ccxt-python ccxt skill Helps Python developers integrate cryptocurrency exchanges using CCXT. Covers REST and WebSocket endpoints in both synchronous and asyncio modes. Claude Code CX Codex Cursor +1 2,000installs google-cloud-solution-n-tier-serverless-web-app official google skill Design secure n-tier serverless apps and microservices on Google Cloud with architecture guidance, Terraform, security checks, and deployment help. Claude Code Gemini CLI CX Codex 5,000installs golang-pro https://github.com/Jeffallan skill A Go skill for concurrent code, microservices, performance profiling, and idiomatic interfaces. Use it for goroutines, gRPC, benchmarks, and table-driven tests. Claude Code CX Codex Cursor +1 18,900installs golang-error-handling samber skill Skill for idiomatic Go error handling: wrapping with context, chain inspection, structured logging, and samber/oops integration. Apply when creating, wrapping, inspecting, or logging errors in Go code. Claude Code CX Codex Cursor +1 43,200installs golang-security samber skill Identifies Go vulnerabilities, models threats with STRIDE and DREAD, and fixes injections, secret leaks, and cryptography flaws. Claude Code CX Codex Cursor +1 42,100installs golang-design-patterns samber skill This skill guides idiomatic Go design for APIs, resource lifecycles, graceful shutdown, and architecture. Use it when designing or reviewing Go code. Claude Code CX Codex Cursor +1 41,900installs golang-performance samber skill Guides AI coding agents through profiling, memory allocation cuts, and CPU optimization in Go projects using a strict measurement-first cycle. Claude Code CX Codex Cursor +1 41,800installs winmd-api-search official github skill This skill finds the right Windows API for a task and returns full type details. Useful when you are building a feature and don't know which class or interface to reach for. GitHub Copilot 5,700installs golang-database samber skill Go database guidelines for database/sql, sqlx, and pgx. Enforces parameterized queries, context passing, and explicit connection pool handling without ORMs. Claude Code CX Codex Cursor +1 40,700installs golang-project-layout samber skill Skill organizes a Go project by convention: cmd/, internal/, pkg/ directories, module naming, go.work for monorepos. Asks about architecture and dependency injection approach, then scaffolds files and config. Claude Code CX Codex Cursor +1 40,300installs golang-troubleshooting samber skill Systematic root-cause debugging for Go code facing deadlocks, panics, and race conditions. Guides the agent to reproduce bugs before applying fixes. Claude Code CX Codex Cursor +1 39,800installs golang-structs-interfaces samber skill Enforces idiomatic Go patterns for struct and interface design. Useful when defining consumer-driven contracts, zero-value structs, and compile-time type checks. Claude Code CX Codex Cursor +1 39,600installs golang-popular-libraries samber skill A skill to select production-ready Go libraries and frameworks by category (web, database, testing, logging, messaging). Use it when you need to compare alternatives or pick a dependency for a new task. Claude Code CX Codex Cursor +1 39,300installs golang-dependency-injection samber skill Guides dependency injection in Go projects, comparing manual constructor injection against wire, dig, fx, and samber/do. Claude Code CX Codex Cursor +1 39,300installs golang-stretchr-testify samber skill Guides coding agents through writing Go tests with stretchr/testify. Helps configure assertions, mocks, and test suites cleanly. Claude Code CX Codex Cursor +1 39,200installs golang-grpc samber skill A Go gRPC skill covering .proto files, servers, clients, errors, TLS, testing, and streaming RPCs. Use it while building, reviewing, or debugging services. Claude Code CX Codex Cursor +1 39,100installs iii-engine-config iii-hq skill Configures the iii engine via worker-compose.yaml or config.yaml. Sets up engine ports, observers, RBAC proxy, and configuration storage. Claude Code CX Codex Cursor +1 4,200installs golang-samber-slog samber skill Helps design structured logging pipelines in Go using samber/slog-* packages. Sets up sampling, PII formatting, and routing to external log backends. Claude Code CX Codex Cursor +1 38,200installs golang-samber-do samber skill A Go skill for dependency injection with samber/do, covering service containers, lifecycles, scopes, health checks, and graceful shutdown. Claude Code CX Codex Cursor +1 38,200installs golang-samber-hot samber skill Guides AI agents in configuring in-memory caching with samber/hot for Go 1.22+. Useful when sizing memory budgets, setting TTLs, or picking eviction policies. Claude Code CX Codex Cursor +1 38,100installs golang-samber-oops samber skill Skill adds support for samber/oops to Claude Code, Cursor and other IDEs — a Go library that brings structured error handling with context, stack traces, error codes, and user-facing messages. Claude Code CX Codex Cursor +1 38,100installs golang-samber-ro samber skill Teaches the agent to work with samber/ro — a ReactiveX implementation in Go with 150+ operators, cold and hot observables, five subject types, and automatic backpressure. Claude Code CX Codex Cursor +1 38,000installs stripe-integration Seth Hobson skill This skill covers Stripe Checkout, subscriptions, webhooks, refunds, and saved payment methods. Use it when a project needs one-time or recurring payments. Claude Code CX Codex Cursor 13,404installs golang-swagger samber skill Adds guidance for OpenAPI and Swagger docs in Go through annotations and spec generation. Useful when documenting handlers or reviewing an existing API. Claude Code CX Codex Cursor +1 37,000installs golang-spf13-cobra samber skill Skill for spf13/cobra, the Go library for building command trees, validating arguments, parsing flags, and generating shell completion. Use it when building or extending a CLI application in Go. Claude Code CX Codex Cursor +1 37,000installs finding-google-skills official Google LLC skill This skill finds the right entry in Google’s skill catalog for stack decisions and setup. Use it when a Google product is named or remains a viable platform option. Claude Code Gemini CLI CX Codex 4,200installs