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Build and harden Ethereum smart contracts with Foundry, invariant testing, and battle-tested OpenZeppelin security patterns.

Validate MCP server tools with contract-style tests to catch schema drift, unsafe behavior, and integration regressions early.

Build intelligent CI/CD pipelines with GitHub Actions, AI-assisted workflow generation, automated testing, and deployment orchestration.

Write and maintain reliable end-to-end tests with Playwright — Microsoft's browser automation library that auto-waits for actionable elements and runs the same suite against Chromium, Firefox, and WebKit.

Official AWS Labs MCP server for serverless development that gives AI assistants contextual guidance plus tools to initialize, build, deploy, and troubleshoot AWS SAM and Lambda-based serverless applications.

Microsoft .NET team skill marketplace for AI coding agents working on .NET, C#, ASP.NET Core, Blazor, MAUI, diagnostics, MSBuild, NuGet, upgrades, tests, AI workflows, RAG pipelines, and C# MCP servers.

Official LiveKit Agent Skills for AI coding agents building low-latency voice AI, LiveKit Agents workflows, handoffs, mandatory tests, and simulation scenario suites.

Open-source framework for building realtime voice, video, and multimodal AI agents with LiveKit rooms, STT, LLMs, TTS, job scheduling, telephony, MCP tools, testing, and production deployment paths.

Official MathWorks MCP server that lets Claude detect MATLAB installations, inspect toolboxes, analyze MATLAB files, evaluate MATLAB code, run scripts, run tests, and expose reviewed custom MATLAB functions as MCP tools.

Unity Editor MCP bridge that lets AI assistants manage assets, edit scripts, control scenes, run tests, and automate Unity workflows through the Model Context Protocol.

Offensive security MCP framework that connects AI agents to a large toolkit for authorized penetration testing, vulnerability discovery, CTF, OSINT, and security research workflows.

Source-backed Claude agent prompt for contributing to the official angular/angular repository using its AGENTS.md guidance for pnpm, Bazel test targets, coding standards, commit guidelines, zoneless tests, async stability, and PR handling.

Build Inngest-backed Next.js workflows with event triggers, durable steps, local Dev Server testing, API route serving, retries, concurrency, and production deployment review.

Source-backed Claude agent prompt for contributing to the official elastic/kibana repository using its AGENTS.md guidance for Kibana modules, plugin lifecycle boundaries, server plugin lazy loading, TypeScript style, i18n, Scout, Jest, FTR, scoped type checks, and focused validation.

Source-backed Claude agent prompt for contributing to the official mui/material-ui monorepo using its AGENTS.md guidance, pnpm workspace filters, package build and test commands, component conventions, public error-message rules, API docs generation, visual regression and accessibility checks, and pre-PR checklist.

Build and maintain NestJS backend APIs with modules, controllers, providers, dependency injection, configuration, validation pipes, guards, interceptors, exception filters, OpenAPI docs, testing, and production safety review.

Connect Claude to BrowserStack for permission-scoped web, app, accessibility, and test automation workflows.

Open-source evaluation framework for testing RAG systems, prompts, agents, workflows, and other LLM application behavior.

Official visual testing and debugging tool for Model Context Protocol servers.

Open-source prompt testing and red-teaming framework for LLM outputs, regressions, evaluations, and security checks.

Lona trading MCP provides AI-assisted strategy development, backtesting, market data, and portfolio analysis.

A source-backed collection for building repeatable LLM eval and prompt testing workflows with open-source tools: prompt regression tests, RAG and agent metrics, human review datasets, traces, prompt optimization, and release gates.

AI-powered product management specialist focused on user story generation, product analytics, roadmap prioritization, A/B testing, and data-driven decision making

Expert in WCAG 2.2 Level AA accessibility compliance, automated testing tools, ARIA patterns, and inclusive design for web applications

Automated accessibility testing and compliance checking for web applications following WCAG 2.1 and WCAG 2.2 guidelines. This hook automatically runs accessibility scans on HTML files after they are written or edited, using axe-core for comprehensive WCAG compliance testing.

A CLAUDE.md rule for Go application development: goroutine and channel concurrency, context cancellation, performance tuning, HTTP and gRPC services, database patterns, and table-driven testing.

Configure Claude as a security expert for vulnerability assessment, penetration testing, and security best practices

AI testing platform for evaluating, scanning, and monitoring machine learning and LLM application quality.

Transform Claude into a Java and Spring Boot specialist with deep knowledge of layered architecture, Spring Data JPA, Spring Security, configuration best practices, and testing with TestBed and Testcontainers.

A starter kit for designing, documenting, and testing REST APIs with Claude: bundles an API-builder agent with the docs, generate-tests, and debug commands.