Coding

MCP servers, skills and harness building blocks for AI-assisted coding: code review, debugging, refactoring and documentation.

Entries in this category

Published entries only. Guides are counted separately.

Total catalog entries
187
MCP servers
64
Skills
100
Guides
128
Workflows
2
Plugins
7
Harness components
1
AI assistants
13

Free Coding skills

Usable without license costs.

Agent Development

Free

Official Anthropic skill for structuring, triggering, prompting, and testing custom Claude Code agents.

Anthropic

Agentic Evaluation Patterns

Free

GitHub’s official Copilot skill for reflection, rubrics, and iterative quality evaluation of agent outputs.

GitHub

Anthropic Agent Skills

Free

Anthropic's official open-source skill collection: 18 ready-made Claude skills for documents, design, coding, and enterprise workflows, ready to install.

Anthropic

Azure Deployment Preflight

Free

Preflights Bicep deployments with syntax validation, what-if analysis, and permission checks before execution.

GitHub

Azure DevOps CLI

Free

Supports Azure DevOps automation with Azure CLI, projects, repositories, pipelines, and boards.

GitHub

Azure Resource Visualizer

Free

Explores Azure resource groups and produces traceable Mermaid architecture diagrams.

GitHub

Azure Role Selector

Free

Official GitHub guidance for selecting least-privilege Azure roles with Azure MCP tools.

GitHub

Azure Static Web Apps Skill

Free

Assists your AI assistant in creating, configuring, and deploying Azure Static Web Apps.

GitHub

CLAUDE.md Improver

Free

Audits and improves CLAUDE.md project instructions for Claude Code.

Anthropic

Chrome DevTools

Free

Official GitHub skill for browser automation, debugging, and performance analysis with Chrome DevTools MCP.

GitHub

Claude Automation Recommender

Free

Analyzes codebases and recommends tailored Claude Code automations.

Anthropic

Code Change Verification

Free

A required verification workflow for code, test, and build changes in the OpenAI Agents Python repository.

OpenAI

Command Development

Free

Official Anthropic skill for robust slash commands, arguments, frontmatter, and safer Claude Code workflows.

Anthropic

Configured Agent for Claude Code

Free

Official Anthropic skill for configurable plugin settings and local state.

Anthropic

Develop AI Functions Example

Free

Official Vercel skill for developing, validating, and structuring AI SDK examples.

Vercel

Example Skill

Free

Anthropic reference skill for understanding and creating Claude Code skills.

Anthropic

Excalidraw Diagram Generator

Free

GitHub skill for turning natural-language processes, relationships, and architectures into understandable Excalidraw diagrams.

GitHub

ExecuTorch Export

Free

Official PyTorch guidance for exporting and lowering models into the ExecuTorch format.

PyTorch

Final Release Review

Free

A source-grounded release check for openai-agents-python with a clear ship-or-block decision.

OpenAI

Frontend Slides

Free

Creates visually developed HTML presentations and supports reviewed conversion from PowerPoint files.

Zara Zhang

GitHub Copilot SDK

Free

Official agent skill for embedding Copilot workflows in Python, TypeScript, Go, and .NET applications.

GitHub

GitHub Issues

Free

Official GitHub guidance for creating, maintaining, searching, and structuring issue workflows with MCP tools.

GitHub

Address GitHub PR Comments

Free

Official OpenAI workflow for reviewing and selectively addressing comments on the open GitHub pull request.

OpenAI

Home Assistant Dashboard Designer

Free

Codex skill for structured Lovelace dashboards, YAML refactoring, and careful validation.

CCOSTAN

Hook Development

Free

Official Anthropic skill for event-driven Claude Code hooks, validation, and safer plugin workflows.

Anthropic

Jupyter Notebook

Free

Official OpenAI skill for reproducible Jupyter notebooks covering experiments, analysis, and tutorials.

OpenAI

Legacy Circuit Mockups

Free

Create breadboard circuits and retro-computer diagrams as visual HTML5 Canvas mockups.

GitHub

MCP Integration

Free

Official Anthropic skill for integrating MCP servers safely into Claude Code plugins.

Anthropic

MCP-CLI

Free

Official GitHub skill for controlled use of MCP servers and tools from the command line.

GitHub

Make Repo Contribution

Free

Guidance for safe and traceable contributions to GitHub repositories.

GitHub

Markdown to HTML

Free

Turns Markdown into HTML with suitable tools, security checks, and output formats.

GitHub

Mermaid Diagrams

Free

Installable guidance for version-controlled Mermaid diagrams in architecture, code, and data modeling.

davila7

Microsoft Code Reference

Free

Source-oriented research for Microsoft APIs, Azure SDKs, .NET libraries, and verified code samples.

GitHub

Microsoft Docs

Free

Official GitHub skill for precise research across Microsoft documentation.

GitHub

NVIDIA Agent Skills

Free

NVIDIA's official, cryptographically signed skill collection: 100+ agent skills for Physical AI, robotics, simulation, CUDA-X libraries, and RAG, installable in Claude Code, Codex, and other coding agents.

NVIDIA

NuGet Manager

Free

An official agent skill for disciplined NuGet package maintenance in .NET projects and solutions.

GitHub

OpenAI Docs Sync

Free

Official OpenAI skill for comparing SDK implementation, configuration, and English documentation.

OpenAI

OpenAI Docs

Free

Official skill for current OpenAI documentation research with sources and clear product boundaries.

OpenAI

OpenAI Figma Implement Design

Free

Official OpenAI workflow for translating Figma designs into production-ready application code with visual fidelity.

OpenAI

OpenAI Figma Skill

Free

Official OpenAI guidance for Figma-driven design-to-code work with the Figma MCP server.

OpenAI

OpenAI Imagegen

Free

Official OpenAI skill for image generation, editing, variants, and transparent raster assets.

OpenAI

OpenAI Knowledge

Free

Source-oriented research in current official OpenAI documentation for integration questions.

OpenAI

OpenAI Speech Skill

Free

Official OpenAI skill for text-to-speech, voiceover, accessibility reads, and speech batches.

OpenAI

OpenAI Transcribe Skill

Free

Official OpenAI skill for audio-file transcription, speaker separation, and reviewable text output.

OpenAI

PR Draft Summary

Free

Creates a copy-ready pull request title, draft description, and branch suggestion after eligible changes.

OpenAI

PRD

Free

Creates structured Product Requirements Documents for software and AI-powered features.

GitHub

Penpot UI/UX Design

Free

GitHub guidance for professional, accessible UI/UX designs in Penpot using MCP tools.

GitHub

PlantUML ASCII

Free

Create terminal-friendly ASCII or Unicode output from PlantUML diagrams.

GitHub

Playground Builder

Free

Builds interactive self-contained HTML playgrounds with a live preview and copyable prompt.

Anthropic

Playwright CLI Skill

Free

OpenAI’s official workflow for real-browser automation through the Playwright CLI.

OpenAI

Plugin Settings for Claude Code

Free

Official Anthropic skill for project-specific plugin configuration and state files with YAML frontmatter.

Anthropic

Plugin Structure for Claude Code

Free

Official Anthropic skill for Claude Code plugin layout, manifests, components, and automatic discovery.

Anthropic

Power BI Semantic Modeling

Free

Official GitHub Copilot skill for robust Power BI semantic models, DAX, relationships, and performance.

GitHub

PyTorch Add Uint Support

Free

Official PyTorch skill for systematically extending operators with unsigned integer types.

PyTorch

PyTorch Issue Triage

Free

Structures PyTorch GitHub issues, routes them, applies allowed labels, and records triage decisions consistently.

PyTorch

PyTorch Pull Request Review

Free

Reviews PyTorch pull requests for code quality, test coverage, security, and backward compatibility.

PyTorch

Pyrefly Type Coverage

Free

Official PyTorch skill for incrementally migrating Python files to stricter Pyrefly type checking.

PyTorch

React TypeScript Development

Free

Reusable Claude Code skill for type-safe React components, hooks, Server Components, and routing.

davila7

Refactor Skill

Free

Assists your AI assistant in surgical code refactorings to improve maintainability.

GitHub

SQL Queries

Free

Official Anthropic skill for correct, performant SQL across multiple database dialects.

Anthropic

ScoutQA Testing

Free

GitHub skill for AI-powered exploratory web testing with the ScoutQA command line.

GitHub

Security Best Practices

Free

Reviews security requirements in Python, JavaScript, TypeScript, and Go and recommends secure defaults.

OpenAI

Security Ownership Map

Free

Maps security ownership, bus factor, and sensitive code areas from Git history.

OpenAI

Security Threat Model

Free

Creates evidence-grounded, actionable threat models for code repositories and selected project paths.

OpenAI

Sentry

Free

Read-only workflows for querying Sentry through the official command line.

OpenAI

Skill Creator

Free

Official OpenAI Codex skill for creating and updating focused agent skills.

OpenAI

Skill Development

Free

Official Anthropic guidance for structuring, resourcing, progressively disclosing, and validating Claude Code skills.

Anthropic

Skill Installer

Free

Official Codex skill for listing and installing skills from curated OpenAI sources or GitHub repositories.

OpenAI

Skill Writer

Free

Official PyTorch guidance for planning, structuring, and validating Agent Skills for Claude Code.

PyTorch

Smithery CLI Skill

Free

Agent skill for discovering, configuring, and invoking MCP servers and tools directly through the Smithery command line.

Smithery

Snowflake Semantic Views

Free

Official GitHub Copilot skill for creating, altering, and validating Snowflake semantic views with Snowflake CLI.

GitHub

TDD

Free

Test-driven development with behavior-focused tests, clear seams, and small red-green-refactor steps.

Matt Pocock

Tailwind Design System

Free

Working guidance for Tailwind CSS v4, design tokens, component variants, and responsive interfaces.

wshobson/agents

Test Coverage Improver

Free

A measurable workflow for coverage gaps in the OpenAI Agents Python repository.

OpenAI

Turborepo

Free

Vercel skill for tasks, caching, and dependencies in JavaScript and TypeScript monorepos.

Vercel

Update Docs

Free

Vercel skill for systematically reviewing and updating Next.js documentation.

Vercel

Upstash Agent Skills

Free

Upstash's official open-source skill collection: SDK guides for Redis, QStash, Workflow, Vector, Search, and Box — usable without any credentials.

Upstash

VS Code Extension Commands

Free

Guidance for clearly named, visible, and localizable commands in Visual Studio Code extensions.

GitHub

VS Code Extension Localization

Free

Guidance for complete localization of Visual Studio Code extensions.

GitHub

Vercel AI Elements

Free

Official skill for production-ready React building blocks and a registry for AI chat interfaces.

Vercel

Vercel AI SDK

Free

Official skill for building AI applications and agents with the TypeScript AI SDK.

Vercel

Vercel Streamdown

Free

Official skill for streaming-optimized React Markdown rendering in AI applications.

Vercel

Vulnerability Scanner

Free

Structured security analysis with OWASP guidance, attack-surface mapping, and risk-based prioritization.

davila7

Web Application Testing

Free

GitHub skill for Playwright-based testing, debugging, and documentation of local web applications.

GitHub

Web Design Reviewer

Free

GitHub skill for visual web design reviews, responsive quality, and accessible UI improvements.

GitHub

Web Interface Guidelines

Free

Vercel’s official agent skill for systematic reviews of web interfaces.

Vercel

Web Performance Audit

Free

Official Cloudflare skill for measurable web performance audits with Chrome DevTools MCP.

Cloudflare

Writing Hookify Rules

Free

Writes Hookify rules for Claude Code with suitable events, patterns, conditions, and warnings.

Anthropic

aoti-debug

Free

Official PyTorch guidance for systematic debugging of AOTInductor failures.

PyTorch

at-dispatch-v2

Free

Official PyTorch guidance for converting AT_DISPATCH macros to AT_DISPATCH_V2.

PyTorch

cloudflare-browser

Free

Cloudflare skill for browser automation through Browser Rendering and CDP.

Cloudflare

docstring

Free

Official PyTorch guidance for precise, consistent, and verifiable docstrings.

PyTorch

durable-objects

Free

Official Cloudflare skill for stateful coordination with Durable Objects.

Cloudflare

gh-fix-ci

Free

OpenAI Codex skill for inspecting failed GitHub Actions checks and preparing safe fixes.

OpenAI

image-manipulation-image-magick

Free

Official GitHub Copilot skill for image dimensions, formats, metadata, thumbnails, and batch processing with ImageMagick.

GitHub

image-to-code

Free

An image-first website-design workflow: generate references, analyze them closely, then implement the frontend.

Leon Lin

list-npm-package-content

Free

Inspects the actual contents of an npm tarball before publishing or debugging.

Vercel

metal-kernel

Free

Official PyTorch guidance for native Metal kernels and MPS operators on Apple Silicon.

PyTorch

sandbox-sdk

Free

Official Cloudflare skill for secure, isolated code execution with Sandbox SDK.

Cloudflare

yeet

Free

Official OpenAI skill for explicitly requested GitHub pull request flows using the GitHub CLI.

OpenAI