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

dart-build-cli-app dart-lang skill Skill for building command-line applications in Dart. Provides architectural patterns, entrypoint structure, exit codes, stream routing, and subprocess spawning. Claude Code CX Codex Cursor +1 18,000installs api-docs ruvnet skill Skill that turns TypeScript and JavaScript source into documentation: it finds public exports, reads existing JSDoc, writes the missing comments and emits OpenAPI 3.0 for HTTP endpoints. Claude Code CX Codex Cursor +1 891installs workflow-init Vercel Inc. skill Sets up Vercel Workflow SDK in a project where workflow is not installed yet: picks the framework from package.json and walks the official guide up to a working first run. Claude Code CX Codex Cursor +1 3,800installs python-pypi-package-builder official github skill This skill guides Python package creation, testing, versioning, and PyPI publishing. Use it for libraries, SDKs, CLI tools, and framework plugins. GitHub Copilot 943installs pi-agent K-Dense-AI skill Helps you install and configure Pi, then build extensions, integrations, and terminal UI components around it. Claude Code CX Codex Cursor +1 1,200installs wordpress-penetration-testing zebbern skill This skill audits WordPress installations for common vulnerabilities and REST API permission issues in plugins. Designed for authorized security assessments. Claude Code CX Codex Cursor +1 1,100installs sign-in-with-google-web official google skill Guides Google Identity Services setup across web projects. It implements secure token handling and IETF authentication patterns. Claude Code Gemini CLI CX Codex 743installs node mcollina skill Gives an agent Node.js and TypeScript guidance, from running .ts files directly to streams, tests and graceful shutdown. Claude Code CX Codex Cursor +1 5,900installs salesforce-flow-design official github skill Reviews Salesforce Flow architecture, type selection, bulk safety, and fault handling. Use it before designing, reviewing, or activating a Flow. GitHub Copilot 839installs text-to-speech elevenlabs skill Turns text into speech with ElevenLabs. Use it for voiceovers, audio output, or speech features in an application. Claude Code CX Codex Cursor +1 16,600installs api-design-principles sickn33 skill Skill for designing REST and GraphQL APIs from scratch: architecture, versioning, error handling, and authentication that make APIs pleasant for other developers to consume. Claude Code CX Codex Cursor +1 1,000installs shopify-apps sickn33 skill Patterns for Shopify app development with Remix and React Router. Guides App Bridge setups, Polaris UI components, billing flows, and webhooks. Claude Code CX Codex Cursor +1 1,000installs backend-security-coder sickn33 skill Hardens backend application code with allowlist validation, safe database queries, secure cookie handling, and API authentication logic. Claude Code CX Codex Cursor +1 1,000installs twilio-communications sickn33 skill Helps build Twilio communication features: SMS, voice calls, WhatsApp messaging, and two-factor verification. Useful when wiring IVR systems or securing account logins. Claude Code CX Codex Cursor +1 994installs wp-performance WordPress skill Backend profiling skill for optimizing WordPress sites using WP-CLI, REST headers, and diagnostic scripts without browser access. Claude Code CX Codex Cursor +1 6,100installs php-pro VoltAgent Community subagent Claude Code subagent for PHP 8.3+, Laravel, and Symfony projects requiring strict typing, PHPStan level 9 checks, and async patterns. Claude Code 2,019installs ddd-aggregate ruvnet skill Scaffolds a DDD aggregate root with an entity, value objects, a repository interface, domain events, and test stubs. Useful when modeling business logic in an existing bounded context. Claude Code CX Codex Cursor +1 749installs ddd-context ruvnet skill Scaffolds a standard DDD bounded context directory structure with domain, application, and infrastructure layers. Useful when splitting monoliths. Claude Code CX Codex Cursor +1 738installs ddd-validate ruvnet skill Checks bounded context integrity in TypeScript projects and flags domain boundary leaks. Useful for DDD architecture audits and pre-merge CI checks. Claude Code CX Codex Cursor +1 736installs sparc-implement ruvnet skill A skill that runs SPARC design phases: writes algorithm pseudocode, defines module boundaries and API contracts, then generates working code. Use it if you're developing with SPARC methodology and want to automate the architecture stage. Claude Code CX Codex Cursor +1 734installs migrate-validate ruvnet skill A skill that automatically validates pending database migrations for errors: broken foreign key references, incomplete rollbacks, naming violations. Catches issues before they reach the database. Claude Code CX Codex Cursor +1 728installs voice-ai-development sickn33 skill This skill guides work on voice applications and real-time voice agents. Use it when a task involves speech recognition, speech synthesis, or streamed audio. Claude Code CX Codex Cursor +1 959installs plaid-fintech sickn33 skill Provides integration patterns for the Plaid API, covering Link tokens, ACH Auth, transaction sync, balance checks, and webhook handling. Claude Code CX Codex Cursor +1 956installs convex-create-component convex skill A skill to design and build reusable Convex components with isolated tables and a clear API boundary. Useful when you need to extract backend logic into a self-contained module or package an integration that owns its own data. Claude Code CX Codex Cursor +1 130,600installs wp-block-themes WordPress skill Guides the agent through building WordPress block themes, editing theme.json, and organizing templates. Useful when styles fail to apply in the Site Editor. Claude Code CX Codex Cursor +1 5,800installs php-pro Seth Hobson subagent Writes idiomatic PHP 8+ code focused on low memory usage. Employs generators, SPL data structures, and native standard library features. Claude Code CX Codex Cursor 2,019installs architecture-patterns sickn33 skill Guides backend system design using Clean Architecture, Hexagonal Architecture, and DDD, and assists with monolith decomposition. Claude Code CX Codex Cursor +1 903installs wp-block-development WordPress skill A WordPress skill for Claude Code, Codex and Cursor that walks an agent through Gutenberg block work, from block.json metadata down to deprecations. Claude Code CX Codex Cursor +1 5,500installs wordpress-router WordPress skill Identifies the structure of a WordPress codebase and directs the agent to the appropriate workflow. Useful before starting work on plugins, themes, or core checkouts. Claude Code CX Codex Cursor +1 5,500installs aws-serverless aws skill A router skill for AWS serverless work: it picks a compute form factor per component and hands off to the skill that owns it. Claude Code CX Codex Cursor +1 10,100installs golang-pro Seth Hobson subagent This subagent helps design Go services, inspect concurrent code, and profile performance. Use it when a task calls for tested code and careful goroutine handling. Claude Code CX Codex Cursor 1,911installs wp-wpcli-and-ops WordPress skill A skill for WordPress operations through wp: move domains, export the database, install plugins, inspect cron. Useful when the agent has to touch a live site, not just theme files. Claude Code CX Codex Cursor +1 5,400installs huggingface-tool-builder huggingface skill A skill for building reusable command-line scripts that fetch, enrich, and process data from Hugging Face. Useful when chaining multiple API calls or running repeated automation tasks. Claude Code CX Codex Cursor +1 1,600installs prisma-orm-setup prisma skill Walks an AI coding agent through Prisma ORM setup: find the version, connect the database, verify the link. New apps default to Prisma ORM 8. Claude Code CX Codex Cursor +1 66,000installs resend resend skill Skill for Resend Email API: send transactional emails, receive inbound via webhooks, manage templates, domains and request logs. Claude Code CX Codex Cursor +1 23,300installs aws-containers aws skill Deploys containers on AWS: EKS, ECS, Fargate, ECR, Elastic Beanstalk. Use it when deploying, debugging, or optimizing containerized workloads. Claude Code CX Codex Cursor +1 9,300installs analyzing-dotnet-performance dotnet skill Scans C# and .NET code for about 50 performance anti-patterns across async, memory, LINQ, and I/O. Handy when auditing hot paths and memory allocations before release. Claude Code CX Codex Cursor +1 4,800installs fetch browserbase skill Retrieves HTML or JSON from static web pages via Browserbase Fetch API without starting a browser session. Useful for fast scraping and header inspection. Claude Code CX Codex Cursor +1 3,000installs orval orval-labs skill Generates type-safe TypeScript clients, TanStack Query hooks, Zod schemas, and MSW mocks from OpenAPI specs. Claude Code CX Codex Cursor +1 589installs clean-architecture wondelai skill A skill that keeps business rules independent of framework and database by enforcing one rule: source code dependencies point inward. Claude Code CX Codex Cursor +1 7,200installs