Skills
97,222 packaged capabilities and playbooks for agents. Install any of them with one command.
Development
Implements Syncfusion .NET MAUI Cartesian Chart (SfCartesianChart) for data visualization with 20+ chart types including line, area, column, bar, financial, statistical, and stacked charts. Use when implementing cartesian charts, line charts, area charts, or financial charts (candle, OHLC). Covers chart axes, legends, tooltips, trackball, zooming and panning, and chart annotations.
Implements Syncfusion .NET MAUI Chips (SfChip or SfChipGroup). Use when working with chips, tags, tag controls, selection chips, input chips, or filter chips in .NET MAUI applications. Covers chip types, chip customization, chip events, chip selection, chip groups, removing chips, close button chips, and chip data binding.
Implements Syncfusion .NET MAUI Circular Charts (SfCircularChart) including pie, doughnut, and radial bar chart types. Use when implementing circular data visualization, pie charts, doughnut charts, or radial bar charts. Ideal for percentage breakdowns, category comparisons, part-to-whole relationships, or displaying proportional data in circular format.
Implements and customize Syncfusion .NET MAUI Circular ProgressBar (SfCircularProgressBar) components. Use when working with circular progress bars, circular progress indicators, radial progress, progress circles, or arc progress in .NET MAUI applications. Covers determinate/indeterminate progress states, animated progress indicators, segmented circular progress, and custom angles.
Implements and customize Syncfusion .NET MAUI Funnel Charts (SfFunnelChart). Use when implementing funnel charts, sales funnel visualization, conversion funnel analysis, process stage visualization, or marketing funnel tracking. Covers funnel chart implementation, customization, data labels, legends, tooltips, segment spacing, and orientation.
Implements Syncfusion .NET MAUI Linear ProgressBar (SfLinearProgressBar) control. Use when working with progress bars, progress indicators, loading indicators, determinate/indeterminate progress, or buffer progress visualization. Covers progress tracking, multi-segment progress, animated progress, and gradient progress bars.
Implements Syncfusion .NET MAUI Picker (SfPicker) control. Use when working with picker controls, item pickers, selection pickers, multi-column pickers, or dialog pickers in .NET MAUI applications. This skill covers installation, configuration, modes (Default, Dialog, RelativeDialog), header/footer customization, column handling, data binding, events, and accessibility.
Implements Syncfusion .NET MAUI Polar Charts (SfPolarChart) for visualizing data in polar coordinates. Use when working with polar charts, radar charts, spider charts, web charts, or circular data visualization. Ideal for displaying data in terms of values and angles, creating line or area series in polar layouts, or comparing multiple data series radially.
Implements Syncfusion .NET MAUI Shimmer (SfShimmer) loading placeholder effects. Use when implementing shimmer or skeleton loading animations, loading placeholders, or content loading indicators in .NET MAUI apps. Covers shimmer types (CirclePersona, Article, Feed, Shopping), custom shimmer views, wave animation, and customization.
Use this skill ALWAYS when the user needs to implement Syncfusion MAUI Spark Charts. Triggers on spark chart, sparkline, micro-chart, trend visualization, data visualization in small spaces, chart types (line, area, column, win/loss), markers, range bands, axis configuration, data point styling. Also use immediately for chart customization, performance optimization, marker configuration, data binding patterns, accessibility needs.
Implements Syncfusion .NET MAUI Sunburst Chart (SfSunburstChart) for hierarchical data visualization using a radial, multi-level circular layout. Use this for sunburst charts, radial hierarchical charts, multi-level pie charts. Ideal for visualizing organizational structures, file systems, or nested categorical data.
Implements Syncfusion UWP SfPdfViewerControl for native Windows PDF viewing, page navigation, annotations, text search/selection, ink signatures, printing, bookmark/hyperlink navigation, and toolbar/UI customization. Use when working with PDF viewer setup, document loading, annotations workflows in UWP apps.
Systems analysis expert for understanding unfamiliar codebases, distributed architectures, and technical toolchains. Use when asked to investigate a system, survey how components interact, explain what a tool does, find gaps in an architecture, or produce a learning document about a technical domain.
Write Tailwind CSS following practices that keep a fast-to-write codebase maintainable — use design tokens instead of magic values, keep class lists short, group tokens semantically, generate classes in consistent order, avoid @apply for extracting repeated styles, and use fixed variants instead of arbitrary className props. Use this whenever writing or editing Tailwind classes, components, or config, and also when reviewing, cleaning up, refactoring, or auditing an existing Tailwind project. Do NOT use for general CSS architecture unrelated to Tailwind, or for build tooling unrelated to CSS output (bundlers, JS minification, etc.).
Technical blog post writing with structure, code examples, and developer audience conventions. Covers post types, code formatting, explanation depth, and developer-specific engagement patterns. Use for: engineering blogs, dev tutorials, technical writing, developer content, documentation posts. Triggers: technical blog, dev blog, engineering blog, technical writing, developer tutorial, tech post, code tutorial, programming blog, developer content, technical article, engineering post, coding tutorial, technical content
Technical writing expert for API documentation, README files, tutorials, changelog management, and developer documentation. Covers style guides, information architecture, versioning docs, OpenAPI/Swagger, and documentation-as-code. Activates for technical writing, API docs, README, changelog, tutorial writing, documentation, technical communication, style guide, OpenAPI, Swagger, developer docs.
Comprehensive guide for creating Telegram Mini Apps with React using @tma.js/sdk-react. Covers SDK initialization, component mounting, signals, theming, back button handling, viewport management, init data, deep linking, and environment mocking for development. Use when building or debugging Telegram Mini Apps with React.
Review and address code changes in Tenzir projects. Use when auditing diffs or pull requests for bugs, security issues, missing tests, documentation drift, readability problems, performance regressions, user experience issues, or when handling pull request review comments, especially implementing requested changes, replying to reviewers, resolving GitHub review threads, or verifying that review feedback has a final state. Also use this skill whenever the user says "review", "look at this PR", "check my changes", "audit this diff", "address the review findings", or "resolve PR comments".
Create distinctive, production-grade terminal user interfaces with high design quality. Use this skill when the user asks to build CLI tools, TUI applications, or terminal-based interfaces. Generates creative, polished code that avoids generic terminal aesthetics.
Comprehensive Three.js and React Three Fiber skill for creating 3D scenes, characters, NPCs, procedural generation, animation retargeting, and interactive experiences. Use when user asks to "create Three.js scene", "setup React Three Fiber", "add 3D character", "create NPC AI", "procedural 3D generation", "retarget animation", "setup avatar system", or "create 3D game".
Works with the OpenMeter REST API for usage metering, billing, and entitlements. Covers CloudEvents ingestion, meters, features, plans, customers, subscriptions, entitlements, notifications, billing profiles, invoices, apps, addons, grants, and the Stripe marketplace. Use when integrating OpenMeter, debugging metering, building catalog sync scripts, or when the user mentions OpenMeter API.
Once you have chosen a new developer tool, SDK, API or hosted service to add to a project, look it up on agent.reviews to see how other coding agents got on setting it up and coding against it (install, docs, auth, SDK, errors), and plan around that friction. The reviews do not measure how good a tool is (result quality, accuracy, speed, price, the end user's experience), so never use them to pick or rank tools, or in place of the docs, a web search or benchmarks. Skip it for a tool the project already uses and for questions about which tool performs best.
Advanced TypeScript type system patterns for generics, conditional types, mapped types, template literals, and utility types. Use when implementing complex type logic, creating reusable type utilities, or enforcing type safety beyond basic annotations — discriminated unions with exhaustive checks, branded/opaque types for domain safety, satisfies vs as const decisions, NoInfer for inference control, module augmentation for third-party types, or choosing between hand-rolled types and type-fest utilities. Do not use for basic TypeScript syntax or simple type annotations.
UiPath Coded Functions — deterministic Python or TypeScript/JavaScript units built with the `uip function` CLI (`new -l py|ts|js`, `init`, `serve`, `run`, `pack`, `publish`); the `functions` map in `uipath.json` marks the project. Python: Pydantic Input/Output models, lazy `UiPath()` SDK singleton. JS/TS: `defineFunction` + `defineSchema<T>()` contracts, HTTP endpoints for Coded App backends or run-as-job, `FunctionError`. Rule-based logic, data transforms, ERP/Integration Service calls — invoked as Maestro Service Tasks, from agents, via Orchestrator `POST /Jobs/StartJobs`, or HTTP triggers; no LLM reasoning or agent loop. For LLM/agentic projects (LangGraph, LlamaIndex, OpenAI Agents, `agent.json`)→uipath-agents. For the Coded App frontend itself (React app code, PKCE setup, app deploy)→uipath-coded-apps.
Install, configure, and use the Unity Command Line Interface (CLI) for automated production workflows, project management, and cloud integration. Use when setting up CLI-based build automation, CI/CD pipelines, Editor/module management, authentication, or localhost API calls via the experimental Unity Pipeline package. Designed for verifiable, machine-readable game production workflows where the build machine must be describable and tests must return evidence. Triggers on: Unity CLI, unity command line, unity automation, unity ci/cd, unity build script, unity pipeline, unity production workflows.
Drive a live Unity Editor or Player with unity-cli. Use when a task must inspect or change Unity scenes, GameObjects, components, transforms, prefabs, materials, ScriptableObjects, project assets, play mode, screenshots, profiler recording, Unity Test Framework runs, or execute C# inside Unity; also use for Unity console maintenance and unity-cli setup, status, refresh, snippets, or custom commands. Do not use for source-only Unity coding that does not require interaction with the live Editor or Player.
Use when a Backstage plugin needs to gate UI behind permissions (frontend) or authorize actions in route handlers (backend). Covers createPermission, the usePermission hook and RequirePermission component, the coreServices.permissions service for backend authorization, and resource permissions for per-instance checks. Triggers on phrases like "require permission", "gate this UI", "check authorization", or imports of @backstage/plugin-permission-common, @backstage/plugin-permission-react, or @backstage/plugin-permission-node.
Expert in using v0.dev for AI-powered UI generation. Covers prompting strategies, component iteration, shadcn/ui integration, export workflows, and customization. Knows how to get the best results from v0 and integrate generated components into production codebases. Use when "v0, v0.dev, generate ui, shadcn component, ai component, generate component, v0, v0-dev, ui-generation, shadcn, component-generation, ai-ui, vercel" mentioned.
React and Next.js performance optimization guidelines from Vercel Engineering. This skill should be used when writing, reviewing, or refactoring React/Next.js code to ensure optimal performance patterns. Triggers on tasks involving React components, Next.js pages, data fetching, bundle optimization, or performance improvements.
Enforce Vertical Slice Architecture (VSA) when building applications in any language (Go, .NET/C#, Java, Kotlin, TypeScript, Python, etc.) and any type (web API, mobile backend, CLI, event-driven). Organize code by feature/use-case instead of technical layers. Each feature is a self-contained vertical slice with a single entry point that receives the router/framework handle and its dependencies. Use when the user says "vertical slice architecture", "VSA", "organize by feature", "feature-based architecture", "slice architecture", or when building a new app or feature and the project already follows VSA conventions. Also use when reviewing or refactoring code to align with VSA principles.
Common Walrus error messages, their causes, and fixes. Use when the user encounters an error while using Walrus CLI, TypeScript SDK, HTTP API, or Move integration. Covers VMVerificationOrDeserializationError, ChainNotSupportedError, tip exceeded, RetryableWalrusClientError, file.bytes is not a function, 413 Payload Too Large, BlobNotCertifiedError, spawn walrus ENOENT, Cannot find gas coin, EWrongVersion, and other errors the documentation and the SDK source describe.
Expert data extraction guide. Starts with a structured intake to understand the target. Always tries the cheapest path first (HTTP requests → browser fingerprinting → headless browser). Covers TLS/HTTP fingerprint impersonation (curl_cffi, primp, rnet), the modern stealth-browser stack (patchright, camoufox, nodriver), the anti-bot vendor matrix (Cloudflare, DataDome, Kasada, Akamai) with per-vendor bypass, CAPTCHA/Turnstile solving, proxy networks and managed unblockers (Zyte API, Web Unlocker) with geo-targeting, structured-data extraction (JSON-LD/microdata/OpenGraph), AI/LLM-driven and adaptive extraction (scrapling, crawl4ai, firecrawl), site-stack playbooks (Next.js App Router/RSC, Tableau, OData, PX-Web, SDMX, ASP.NET, GraphQL, SPAs), browser request injection, live request interception, and clean OOP architecture standards for scrapers and extracted data. Use whenever the user wants to scrape/extract data from a website or API
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.