GitHub Copilot skills, plugins, subagents, slash commands and mcp servers

Software Engineer Agent official github subagent Autonomously writes code to specification, executes tests, and resolves ambiguities without asking for manual confirmations. ★ 40,369repo stars sast-sca-security-analyzer official github subagent Runs SAST and SCA scans directly on your codebase. Finds source code vulnerabilities, audits dependency manifests, maps findings to CWE IDs, and drafts fixes. ★ 40,369repo stars Refine Requirement or Issue official github subagent Enriches GitHub issues with testable acceptance criteria and technical dependencies directly in your repository. ★ 40,369repo stars react18-auditor official github subagent Scans React 16 and 17 class components for deprecations before moving to React 18.3.1. It reads code without editing files and outputs results to .github/react18-audit.md. ★ 40,369repo stars Python Notebook Sample Builder official github subagent Builds interactive Jupyter notebooks in VS Code to demonstrate Azure and AI features, testing every snippet in the terminal first. ★ 40,369repo stars Prompt Engineer official github subagent Treats each message as a prompt draft, reviews its quality, and returns a rewritten instruction for a language model. ★ 40,369repo stars Power Platform MCP Integration Expert official github subagent Guides Power Platform custom connector development with MCP for Copilot Studio. Helps flatten Swagger schemas, validate packages, and secure OAuth flows. ★ 40,369repo stars Power BI DAX Expert Mode official github subagent Provides DAX guidance for Power BI following Microsoft best practices. It helps write clean measures, build time intelligence calculations, and optimize query speed. ★ 40,369repo stars PostgreSQL Database Administrator official github subagent Subagent for managing PostgreSQL databases with the VS Code extension. It executes queries, inspects schemas, and handles admin tasks directly in Copilot. ★ 40,369repo stars PHP MCP Expert official github subagent Assists in building Model Context Protocol servers in PHP 8.2+ using the official PHP SDK. Generates tools, resources, and prompts with PHP attributes. ★ 40,369repo stars one-shot-feature-issue-planner official github subagent Converts a single feature request into a complete, issue-ready implementation plan without asking follow-up questions. ★ 40,369repo stars Expert Nuxt Developer official github subagent Guides Nuxt 3 and Nitro development with TypeScript typing. Helps configure data fetching via useFetch, resolve hydration issues, and structure server routes. ★ 40,369repo stars Microsoft Study and Learn official github subagent A guided tutor subagent for Microsoft and Azure technologies that uses hints instead of direct answers. Handy for exam prep and systematic learning. ★ 40,369repo stars Sensei - Junior Mentor official github subagent A Socratic mentor agent that guides junior developers through probing questions instead of handing out answers. It helps beginners understand code and debug issues independently. ★ 40,369repo stars Kotlin MCP Server Development Expert official github subagent Helps build Model Context Protocol servers in Kotlin using the official SDK, coroutines, and Ktor. Useful for wiring up tools, resources, and custom transports. ★ 40,369repo stars Java MCP Expert official github subagent Guides development of Model Context Protocol servers in Java using MCP Java SDK 2.x. Useful when configuring stdio transports, tool schemas, or Spring AI 2.0+ integrations. ★ 40,369repo stars Go MCP Server Development Expert official github subagent Builds Model Context Protocol servers in Go using the official Go SDK. Generates type-safe tools, resources, and transport configurations for Copilot. ★ 40,369repo stars Gilfoyle Code Review Mode official github subagent Conducts code reviews with the abrasive technical elitism of Silicon Valley's Bertram Gilfoyle. It delivers blunt critiques of architecture and security. ★ 40,369repo stars gem-reviewer official github subagent Runs independent reviews of plans, tasks, code, configs, and integrations. Emits strict JSON validation reports for orchestrators without touching source files. ★ 40,369repo stars gem-documentation-writer official github subagent Generates technical documentation, README files, and diagrams from source code. It treats code as read-only truth and maintains AGENTS.md without writing application code. ★ 40,369repo stars gem-code-simplifier official github subagent A refactoring subagent that removes dead code and drops complexity. Handy when cleaning up messy logic without altering existing behavior. ★ 40,369repo stars Frontend Performance Investigator official github subagent Diagnoses runtime web performance issues, layout shifts, and Core Web Vitals regressions by connecting browser traces directly to your code. ★ 40,369repo stars C++ Expert official github subagent Provides guidance on modern C++ following ISO standards and C++ Core Guidelines. It helps write clean architecture, refactor legacy code, and set up testing. ★ 40,369repo stars Dynatrace Expert official github subagent Integrates Dynatrace observability and security directly into repository workflows. It investigates incidents, verifies deployments, and identifies vulnerabilities via traces and logs. ★ 40,369repo stars Doublecheck official github subagent Verifies AI-generated text by finding web sources and highlighting hallucination risks. Useful before publishing content containing legal citations, statistics, or API syntax. ★ 40,369repo stars DevTools Regression Investigator official github subagent Reproduces UI regressions in the browser and pinpoints root causes using network and console evidence. ★ 40,369repo stars DevOps Expert official github subagent A subagent that guides projects through the DevOps Infinity Loop — from planning to monitoring — and automates every phase. ★ 40,369repo stars Delphi Expert official github subagent Assists with Object Pascal development in Delphi projects. It covers VCL, FMX, FireDAC data access, memory safety, and unit registration in project files. ★ 40,369repo stars Declarative Agents Architect official github subagent Designs Microsoft 365 Copilot declarative agents using the v1.5 schema. Generates TypeSpec definitions, validates character constraints, and configures tooling. ★ 40,369repo stars Critical thinking mode instructions official github subagent Forces the engineer to justify technical decisions by repeatedly asking "Why?". It questions assumptions without modifying project files. ★ 40,369repo stars Context7-Expert official github subagent This subagent checks library documentation through Context7 and uses current syntax in its answers. Use it for framework and package questions. ★ 40,369repo stars VSCode Tour Expert official github subagent Subagent that creates .tour files — interactive step-by-step codebase walkthroughs in VSCode CodeTour format. ★ 40,369repo stars Clojure Interactive Programming official github subagent Clojure pair-programming agent enforcing REPL-first workflows before saving files. It prevents silent fallbacks and protects pure functional architecture. ★ 40,369repo stars Blueprint Mode official github subagent Executes strict workflows (Debug, Express, Main, Loop) to deliver clean fixes without guesses or conversational fluff. Best for disciplined code changes. ★ 40,369repo stars Bicep Planning official github subagent Bicep Planning builds a structured Azure Bicep implementation plan and saves it as Markdown. Use it before creating infrastructure resources and configuration. ★ 40,369repo stars Bicep Specialist official github subagent Writes Azure Bicep templates following Azure Verified Modules and best practices. Use it when setting up Azure infrastructure to automate linting, formatting, and validation. ★ 40,369repo stars Azure AVM Bicep mode official github subagent Creates, updates, and reviews Azure Bicep IaC using Azure Verified Modules. Helps configure cloud resources according to verified Microsoft practices. ★ 40,369repo stars Azure SaaS Architect mode instructions official github subagent Configures an AI assistant into an Azure SaaS architect for multitenant platforms. Focuses on tenant isolation, scale units, and Well-Architected SaaS patterns. ★ 40,369repo stars aws-serverless-architect official github subagent Guides AWS serverless architecture design using Lambda, API Gateway, and DynamoDB. Useful when you need ready IaC templates and event-driven patterns. ★ 40,369repo stars aws-principal-architect official github subagent This subagent reviews AWS architecture through the Well-Architected Framework and suggests specific services and next steps. Use it when planning infrastructure or weighing architectural trade-offs. ★ 40,369repo stars