Skills
97,222 packaged capabilities and playbooks for agents. Install any of them with one command.
Development
Use when handling BK-CI YAML pipeline import/export, bidirectional YAML and Model conversion, PAC, template references, and YAML validation. Prefer this when the user mentions YAML pipelines, PAC, templating, comment preservation, expression parsing, or conversion debugging.
Ask the agent to zoom out and offer broader context or a higher-level perspective. Use when you are unfamiliar with a section of code or need to understand how it fits into the bigger picture. Use when the user is unfamiliar with code or needs a higher-level perspective, or mentions zoom out, zoom-out.
Generate ABP Application.Contracts layer scaffolding (interfaces, DTOs, permissions) from technical design. Enables parallel development by abp-developer and qa-engineer. Use when: (1) backend-architect needs to generate contracts, (2) preparing for parallel implementation workflow, (3) creating API contracts before implementation.
Add 3D models (.glb/.gltf) to a Decentraland scene using GltfContainer. Covers loading, positioning, scaling, colliders, parenting, and browsing 5,700+ free assets from the OpenDCL catalog. Use when the user wants to add models, import GLB files, find free 3D assets, or set up model colliders. Do NOT use for materials/textures (see advanced-rendering) or model animations (see animations-tweens).
Implements age-gating mechanisms for online services to restrict access based on user age. Covers hard gates versus soft gates, neutral age prompts, re-verification triggers, circumvention prevention, and regulatory requirements under GDPR, COPPA, UK Online Safety Act, and DSA. Keywords: age gate, age restriction, neutral prompt, children, online services, access control.
Build and review cross-cutting agent-host chat behavior through lifecycle contributions. Use when adding turn lifecycle side effects, prompt or context injection, restored-history transformation, protocol-action observation, or when reviewing changes that add code to AgentSideEffects or AgentService.
Batteries-included agent component for React/Next.js from ui.inference.sh. One component with runtime, tools, streaming, approvals, and widgets built in. Capabilities: drop-in agent, human-in-the-loop, client-side tools, form filling. Use for: building AI chat interfaces, agentic UIs, SaaS copilots, assistants. Triggers: agent component, agent ui, chat agent, shadcn agent, react agent, agentic ui, ai assistant ui, copilot ui, inference ui, human in the loop
Design and build websites using AI coding agents with static site generators. Covers Astro-first workflow, iterative visual refinement via browser feedback, skill-enhanced prompting (frontend-design, copywriting), animations, and high-bar polish loops. Use when building a website with an AI agent, designing landing pages, or iterating on web design with LLM assistance.
Create or update root and nested AGENTS.md files that document scoped conventions, monorepo module maps, cross-domain workflows, and (optionally) per-module feature maps (feature -> paths, entrypoints, tests, docs). Use when the user asks for AGENTS.md, nested agent instructions, or a module/feature map.
Build RAG (Retrieval Augmented Generation) pipelines with web search and LLMs. Tools: Tavily Search, Exa Search, Exa Answer, Claude, GPT-4, Gemini via OpenRouter. Capabilities: research, fact-checking, grounded responses, knowledge retrieval. Use for: AI agents, research assistants, fact-checkers, knowledge bases. Triggers: rag, retrieval augmented generation, grounded ai, search and answer, research agent, fact checking, knowledge retrieval, ai research, search + llm, web grounded, perplexity alternative, ai with sources, citation, research pipeline
Alchemy IaC framework for TypeScript. Use when the user mentions Alchemy, wants to set up infrastructure, deploy Cloudflare Workers, configure databases, KV, R2, queues, use bindings and secrets, set up dev mode, use framework adapters (Vite, Astro, React Router, SvelteKit, Nuxt, TanStack Start), create custom resources, or work with any Alchemy provider.
Angular 12-16 performance optimization guidelines with NgModules, RxJS patterns, and classic template syntax (*ngIf, *ngFor). Use when maintaining or working with pre-v17 Angular codebases. Triggers on tasks involving Angular components, services, modules, or performance improvements in legacy projects.
Angular Material and CDK for UI components, theming, and custom components. Covers standalone Material components and custom themes. USE WHEN: user mentions "Angular Material", "Material CDK", "mat-table", "mat-dialog", "Angular UI components", "Material theming", "Angular CDK" DO NOT USE FOR: Bootstrap - use CSS framework skills, PrimeNG or other Angular UI libs
Use when the user asks to answer, address, or reply to review comments on one or more GitHub pull requests — “answer the review on #12”, “address the comments on my PRs”, “reply to the review findings” — in Claude Code, Codex, or any other agent. Not for reviewing a pull request, and not for feedback given in the conversation.
Best practices for Apollo GraphQL development including Apollo Client (React hooks, caching, error handling) and Apollo Server (schema design, resolvers, context, plugins). Use when writing, reviewing, or refactoring GraphQL code with Apollo, setting up Apollo Client/Server, implementing queries/mutations, configuring cache policies, or handling GraphQL errors.
Interactively guides the documentation of arc42 Section 7 (Deployment View). Asks about infrastructure, environments, and software-to-hardware mapping before generating C4 PlantUML deployment diagrams and environment comparison tables. Iterates until the user is satisfied.
Interactively guides the documentation of arc42 Section 10 (Quality Requirements). Elaborates quality goals from Section 1.2 into concrete, measurable scenarios grounded in Q42 quality criteria (quality.arc42.org). Coaches against vague metrics and checks coverage against architectural decisions. Iterates until the user is satisfied.
Interactively guides the documentation of arc42 Section 11 (Risks and Technical Debt). Pre-populates candidates from Sections 9 and 10, works through risk categories systematically, and generates a prioritized risk register and debt backlog with mitigation strategies. Iterates until the user is satisfied.
Interactively guides the documentation of arc42 Section 12 (Glossary). Scans other sections for undefined terms, asks about domain vocabulary and ambiguous terminology, and generates a structured glossary with consistent preferred terms. Iterates until the user is satisfied.
Settle a one-way door before code locks it: a change to persisted data or its schema, a contract that writes, a security boundary, an ownership model, or a seam an accepted ADR governs. Invoke when shaping or delivering meets one, or when the user opens an architecture phase, before dispatching any agent to design one. Leave routine, local, and safely reversible choices to implementation.
Suite of tools for creating elaborate, multi-component claude.ai HTML artifacts using modern frontend web technologies (React, Tailwind CSS, shadcn/ui). Use for complex artifacts requiring state management, routing, or shadcn/ui components—not for simple single-file HTML/JSX artifacts.
ASP.NET Core 8+ with controllers, services, DI, configuration, and middleware pipeline. Covers Program.cs setup and enterprise patterns. USE WHEN: user mentions "ASP.NET Core", "Web API", ".NET controllers", "Program.cs", "dependency injection", ".NET DI", ".NET configuration", "appsettings" DO NOT USE FOR: Minimal APIs (use `aspnet-minimal-api`), Spring Boot (use `spring-boot`), NestJS (use `nestjs`), Express (use `express`)
Synthesize new waveforms from scratch for Simulink inports using createInputDataset. Use ONLY when the user asks to generate, create, or synthesize signals (step, ramp, sine, chirp, pulse, noise) to populate a Dataset for External Inputs or Signal Editor. Covers timeseries and timetable formats with correct data type, interpolation, units, and dimensions. Also covers function-call and trigger inport timing setup. Do NOT use when the user wants to load, import, or read existing data from files (MAT, CSV, spreadsheet) — even if that data will be used as model input. Do NOT use for running simulations or plotting outputs.
New to MCP?
From what the protocol is to installing your first server, these answers cover most first questions.
An open protocol that defines how AI applications connect to external tools and data in a uniform way. Clients talk to the model; MCP servers provide tools, resources and prompt templates. They exchange standard messages, so one server can be reused by many clients.