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

poka-yoke official github skill Helps shape APIs and states so common mistakes are harder to express. Use it to audit code for footguns or to close a recurring class of bugs. GitHub Copilot 31installs foundry-hosted-agent-copilotkit official github skill Connects a CopilotKit React frontend to a Microsoft Agent Framework agent in Microsoft Foundry via the AG-UI protocol. Helps connect and deploy agentic web apps. GitHub Copilot 29installs sql-object-impact-analysis official github skill Traces dependencies on tables, columns, and stored procedures across SQL scripts and app code before schema changes. Useful for legacy codebases. GitHub Copilot 26installs api-breaking-change-detector official github skill Cross-references C# Web API controllers and DTOs against TypeScript or JavaScript clients in source code. Catches breaking contract drift before deployment. GitHub Copilot 23installs system-commandline-cli official github skill A skill for building .NET CLI apps with System.CommandLine 2.x.x. It enforces architecture patterns for commands, options, and DI handlers. GitHub Copilot 21installs server-side-conversion-tracking official github skill This skill sets up server-side purchase reporting for Facebook, TikTok, Google, and Bing. Use it when ad platforms under-report conversions. GitHub Copilot 21installs java-helidon official github skill A GitHub Copilot skill that steers code generation toward Helidon 4 practices in SE and MP. Useful when the agent keeps emitting Helidon 3 APIs. GitHub Copilot 21installs llm-cost-optimizer Alireza Rezvani skill Audits token usage and cuts LLM API spend through model routing, caching, and prompt compression. Useful when API bills spike or before launching new AI endpoints. Claude Code 73installs application-integration-troubleshooting official google skill Diagnoses failed, stuck, or silent Google Cloud Application Integration and Integration Connectors runs. Use it when HTTP 200 does not match the work completed. Claude Code Gemini CLI CX Codex 16installs application-integration-basics official google skill Guides Google Cloud Application Integration setup, region provisioning, IAM roles, platform limits, and interface choices between iPaaS and custom code. Claude Code Gemini CLI CX Codex 16installs application-integration-authoring official google skill Manage Google Cloud Application Integration versions through the REST API or Python client. Use it to publish workflows and promote versions across environments. Claude Code Gemini CLI CX Codex 16installs zero-hallucination-coder Alireza Rezvani skill Runs an engineering loop across five strict phases to prevent invented APIs, broken imports, and bloated code. Ideal for schema changes, auth rewrites, and multi-file tasks. Claude Code 69installs nextjs official Vercel Labs skill Guidance for building and debugging Next.js App Router projects. Use it to work through routing, Server Components, data fetching, and rendering choices. CX Codex GP ChatGPT 50installs supabase-postgres-best-practices official supabase skill A rule set for Postgres performance, maintained by Supabase. Useful when your agent writes queries, designs schemas or digs into a slow database. CX Codex GP ChatGPT 40installs supabase-postgres-best-practices official supabase skill Supabase guidelines for Postgres performance optimization. Helps developers write SQL queries, design database schemas, and configure RLS. CX Codex GP ChatGPT 40installs migrating-oracle-to-postgres-data-access-code official github skill Moves .NET/C# data-access code from Oracle to PostgreSQL with Npgsql. Use it while migrating an application's code layer alongside its database. GitHub Copilot 10installs stripe-best-practices official Stripe skill Integration guide for Stripe in Codex: covers Checkout Sessions, Connect Accounts v2, tax setup, and restricted API keys. CX Codex GP ChatGPT 36installs stripe-best-practices official OpenAI skill This skill guides Stripe API choices for payments, subscriptions, marketplaces, and financial accounts. Use it when building or reviewing a Stripe integration. CX Codex GP ChatGPT 36installs chatgpt-app-submission official OpenAI skill Inspects a ChatGPT Apps MCP server and prepares the submission JSON. Use it before review to collect app info, test cases, and findings. CX Codex GP ChatGPT 29installs upstash-redis official Upstash skill Connect to Redis over HTTP in serverless runtimes using @upstash/redis and configure rate limiting with @upstash/ratelimit without TCP connection pooling. GitHub Copilot 7installs protobuf-grpc-api-review official github skill Reviews .proto and gRPC changes for format compatibility, migration risks, and RPC contract quality. Use it when changing schemas or investigating failures across client versions. GitHub Copilot 7installs uml-and-software-architecture-visualization official OpenAI skill This skill helps choose a notation and format for UML diagrams, architecture maps, workflows, and data models. Use it when you need to describe how a system is structured or behaves. CX Codex GP ChatGPT 24installs cloud-solution-architect microsoft skill Equips your AI agent with Azure Architecture Center guidance. It helps select architecture styles and validate system designs against Well-Architected Framework pillars. Claude Code GitHub Copilot 117installs ai-sdk official Vercel Labs skill Provides Vercel AI SDK guidance for your coding agent. Helps build chat interfaces, streaming routes, tool calls, and agents without obsolete syntax. CX Codex GP ChatGPT 22installs agents-sdk official OpenAI skill Builds, runs, and tests OpenAI Agents SDK apps from Codex. Turns a prompt, repo, or session into a working agent with tools and eval tests. CX Codex GP ChatGPT 22installs agents-sdk official Cloudflare skill Guides building AI agents on Cloudflare Workers with persistent state, durable workflows, and MCP support. Useful when developing server-side agents or chat apps. CX Codex GP ChatGPT 22installs mcp-builder microsoft skill Guide for building Model Context Protocol servers in TypeScript, Python, or C# to connect LLMs with custom APIs. Claude Code GitHub Copilot 108installs workflow official Vercel Labs skill Tells the agent how to build durable Vercel Workflow jobs: pause and resume, retries, step-based runs, crash safety. CX Codex GP ChatGPT 18installs chat-sdk official Vercel Labs skill Guides Codex when building multi-platform bots with Vercel Chat SDK across Slack, Telegram, Discord, and Teams. Useful for shared routing and adapters. CX Codex GP ChatGPT 18installs temporal-developer official Temporal skill Helps develop workflows, resolve non-determinism errors, and manage Temporal workers across multiple languages. CX Codex GP ChatGPT 17installs ncbi-blast-skill official OpenAI skill Submits searches to NCBI BLAST via the Common URL API, polls job status by RID, and formats compact summaries for nucleotide or protein sequences. CX Codex GP ChatGPT 17installs openai-platform-api-key official OpenAI skill Checks for an OpenAI key before API-backed work and guides secure OPENAI_API_KEY setup. Useful when Codex builds or runs an AI tool. CX Codex GP ChatGPT 16installs build-chatgpt-app official OpenAI skill Scaffolds, refactors, and debugs ChatGPT Apps SDK projects combining MCP servers with widget UIs. Useful when building apps for ChatGPT in Codex. CX Codex GP ChatGPT 16installs ncbi-datasets-skill official OpenAI skill Queries NCBI Datasets v2 for genome, assembly, and taxonomy metadata. It produces compact summaries directly in Codex without large raw dumps. CX Codex GP ChatGPT 16installs copilot-sdk microsoft skill Builds programmatic applications using the GitHub Copilot SDK in Node.js, Python, Go, and .NET. Helps configure sessions, tools, and streaming. Claude Code GitHub Copilot 76installs next-forge official Vercel Labs skill This skill guides Codex through next-forge projects, from navigating apps and shared packages to handling common development tasks. Use it when setting up a project or editing @repo/* packages. CX Codex GP ChatGPT 14installs marketplace official Vercel Labs skill Guides AI agents to discover and provision Vercel Marketplace integrations via CLI before scaffolding app code. Useful for commerce, payments, and monitoring. CX Codex GP ChatGPT 14installs uniprot-skill official OpenAI skill This skill sends compact requests to the UniProt REST API and returns summaries for proteins, clusters, and sequences. Use it for focused bioinformatics lookups. CX Codex GP ChatGPT 14installs string-skill official OpenAI skill Submits compact STRING API requests for protein networks and enrichment. Useful for retrieving quick biological summaries without leaving the terminal. CX Codex GP ChatGPT 14installs reactome-skill official OpenAI skill Queries Reactome ContentService for biological pathways, reactions, and participants. Returns concise markdown summaries directly in Codex. CX Codex GP ChatGPT 14installs