Skills
98,873 packaged capabilities and playbooks for agents. Install any of them with one command.
Development
GPU kernel profiling workflow across supported kernel implementation languages. Provides commands for all 4 profiling modes (annotation, event, ncu, nsys), metric interpretation tables, bottleneck identification rules, and the output contract for returning compact results to the orchestrator. Use when: (1) profiling a kernel version, (2) interpreting profiling artifacts/reports, (3) comparing kernel versions, (4) identifying bottlenecks and optimization opportunities, (5) documenting performance in the development log.
Complete FastAPI production system. PROACTIVELY activate for: (1) Project structure (scalable layout), (2) Pydantic schemas (input/output separation), (3) Dependency injection, (4) Async database with SQLAlchemy, (5) JWT authentication, (6) Error handling patterns, (7) Docker deployment, (8) Gunicorn + Uvicorn production, (9) Rate limiting, (10) Testing with httpx. Provides: Project templates, schema patterns, auth setup, Docker config. Ensures production-ready FastAPI applications.
Apply XP practices including pair programming, ensemble programming, continuous integration, and sustainable pace. Use when implementing agile development practices, improving team collaboration, or adopting technical excellence practices.
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.
Provides comprehensive guidance for React development including components, JSX, props, state, hooks, context, performance optimization, and best practices. Use when the user asks about React, needs to create React components, implement hooks, manage component state, or build React applications.
Build React 19 applications with TypeScript. Covers Actions, Activity, use() hook, React Compiler, ref-as-prop, useEffectEvent, and strict TypeScript patterns. Use when creating components, managing state, typing props, handling events, using hooks, or working with React 19 features. Triggers on react, typescript, tsx, component types, hook types, react 19, react compiler, actions, use hook, useEffectEvent, activity, import defer.
Generate a polished, professional README.md for any project — from scratch or by improving an existing one. Use this skill whenever the user mentions README, wants to improve their repo's first impression, asks about shields.io badges, wants a star history chart, contributor avatars, documentation tables, project structure trees, or mermaid architecture diagrams in their README. Also use it when someone wants their GitHub repo to "look more professional", "look legit", or make a better first impression — even if they never say the word "README". Covers badge generation, README rewrites for new versions, fork customization, and adapting README structure to different project types (libraries, apps, docs repos, monorepos). Does NOT cover: CONTRIBUTING.md, CHANGELOG, API documentation, CI/CD setup, GitHub profile READMEs, or generating docs for individual components.
A skill for judging whether refactoring (including redesign of structure, boundaries, and contracts) is needed and how to proceed, in the direction of improving changeability. Use when told "refactor this", "tidy this up", or "clean this up" after local development is complete, when code is hard to understand or maintain, or when Code Smells need to be addressed. For detailed decisions on how to draw boundaries and place responsibilities, use module-boundary-design.
Salla app monetization: plans and addons live in the publication's pricing section (no separate pricing endpoint), billed by Salla. Use when pricing the app, tracking plan/addon state, or gating features by entitlement. Track state from app.subscription.* / app.trial.* events (one family — item_type splits plan vs addon), reconcile via salla_apps action=subscriptions, meter usage against the balance. Signatures → salla-webhooks; tokens → salla-app-auth; wiring → salla-app-lifecycle; in-app purchase UI → salla-addon-purchase / salla-addon-purchase-embedded.
Owns native look-and-feel for a Salla app's EMBEDDED (dashboard) UI — the Partner-dashboard iframe on the Embedded SDK design system. Use WHENEVER an embedded/dashboard page draws visible UI (settings, analytics, addon flows). Its five binding gates must all pass — none skippable — and the final gate is a live demo-store screenshot. Not done until verified. Storefront UI → salla-storefront-ui; SDK/auth wiring → salla-embedded-app.
Set up Storybook on a React+Vite app that has none — defer to Storybook's own agent setup (`npm create storybook@latest`, `storybook skills setup`), then align viteFinal/providers/MCP and ask where stories live. Use for 'set up Storybook', 'install Storybook', or NO_STORYBOOK.
Use when goal, constraints, and success criteria are already settled and the user wants them frozen into a formal spec an agent can execute and verify: 'turn this into a spec', 'write it up as a Seed', or right after an interview. Returns an immutable Seed with acceptance criteria. Not for vague requests (use interview first).
Guide the user through integrating Hyperspell into their project. Installs the SDK, configures the API key, detects the project type, sets up memory ingestion (OAuth or direct), and integrates memory search. Use when a user wants to add Hyperspell to their codebase, set up memory search, or connect user accounts via OAuth.
Keep an eye on this PR. Review and resolve pull request comments and fix build failures autonomously. Use when asked to review PR feedback, address reviewer comments, fix CI failures, resolve PR threads, or handle PR maintenance tasks like "review PR comments", "fix the build", "address PR feedback", "clean up PR", or "resolve comments". Handles comment triage (resolve false positives, fix trivial issues, flag complex ones), build/lint/type errors, and e2e snapshot updates.
Specify algorithms for Model-Based Design: system specs, architecture specs, implementation plans, test plans. Use when creating specifications for controllers, signal processing, diagnostics, estimators, or other algorithms authored in Simulink, Stateflow, System Composer, or MATLAB Function blocks.
Use this skill when writing, reviewing, or refactoring Elixir, OTP, Ecto, or Phoenix/LiveView code. It corrects the staff-level judgment calls a capable model gets wrong by default — reaching for a GenServer as the universal tool, rescuing instead of letting processes crash, N+1 Ecto access, non-atomic writes, unbounded/linked Task fan-out, atom exhaustion from user input, eager Enum where Stream fits, and calling Repo from the web layer. Applies whenever the work touches process design, error handling, concurrency, data access, or LiveView, even if the user doesn't name them.
Complete Stripe refund and dispute lifecycle handling. PROACTIVELY activate for: (1) charge.refunded handler design, (2) charge.dispute.created / charge.dispute.closed handlers, (3) Refund delta computation from event.data.previous_attributes.amount_refunded, (4) Dispute-hold past_due status management, (5) shouldRestoreStatus predicate with satisfies Record<Stripe.Dispute.Status, boolean>, (6) Credit-pack vs subscription refund differentiation, (7) Checkout Session lookup for refund proportion math, (8) Allowlist default-deny for external enums, (9) stripe.checkout.sessions.list({payment_intent}) pattern, (10) Dispute outcome branch logic (won / lost / warning_closed / prevented). Provides: full handler patterns for all three events, predicate examples, credit-pack vs subscription math, exhaustive switch patterns.
Expert guidance on SwiftNIO best practices, patterns, and implementation. Use when developers mention: (1) SwiftNIO, NIO, ByteBuffer, Channel, ChannelPipeline, ChannelHandler, EventLoop, NIOAsyncChannel, or NIOFileSystem, (2) EventLoopFuture, ServerBootstrap, or DatagramBootstrap, (3) TCP/UDP server or client implementation, (4) ByteToMessageDecoder or wire protocol codecs, (5) binary protocol parsing or serialization, (6) blocking the event loop issues.
Guides implementation of Syncfusion WinForms ComboBoxBase control with flexible, pluggable ListControl architecture. Use this when working with advanced combo box implementations requiring custom ListControl-derived controls, CheckedListBox integration, or multi-column dropdowns with GridListControl.
Guide for implementing Syncfusion ComboDropDown control in Windows Forms. Use this when you need a flexible combo box that hosts any control (TreeView, ListView, GridList, custom controls) in the dropdown area. Essential for custom dropdown UI requirements and complex dropdown content beyond standard ListBox functionality.
Implement Syncfusion WinForms GradientLabel control - an enhanced label with gradient backgrounds and custom borders. Use this when creating visually styled labels, colorful headers, or decorative text displays. Covers gradient effects, custom borders, shading configuration, and appearance customization for attractive label designs in Windows Forms applications.
Implement Syncfusion WinForms GradientPanelExt for styled container panels with gradient backgrounds, rounded corners, and border primitives. Use this when building panels with gradient effects, rounded corner containers, collapsible sections, or panels with border elements (text, images, buttons) in WinForms.
Guide for implementing Syncfusion layout managers in Windows Forms applications. Use when creating container layouts with BorderLayout (5-region docking), CardLayout (wizards/property pages), FlowLayout (horizontal/vertical flow), GridLayout (uniform grids), or GridBagLayout (flexible grids with spanning). Covers container controls, child control management, spacing configuration (HGap, VGap), positioning constraints, and designer integration for automatic control arrangement and structured layouts.
Guide for implementing Syncfusion GroupBar (Navigation Pane) control in Windows Forms applications. Use when creating Outlook-style navigation, hierarchical sidebar navigation, collapsible group containers, or toolbox-style interfaces. Covers stacked navigation panes, Office 2007/2010/2016 themed navigation, nested GroupBar containers, and categorized control collections for structured navigation layouts.
Implement Syncfusion Windows Forms Pivot Chart control for visualizing multidimensional data with interactive drill-down capabilities. Use this when working with pivot charts, pivot data visualization, drill-down charts, hierarchical chart data, or business intelligence visualizations. Supports 11+ chart types (Line, Spline, Column, Area, Stacking), data binding with IEnumerable/DataTable, drill up/down operations, pivot table field list, grouping bar, legend customization, Excel export, zooming, scrolling, and touch support.
Guide for implementing Syncfusion RadialMenu control in Windows Forms applications. Use when creating circular context menus, hierarchical radial navigation, or touch-friendly circular menu interfaces. Covers RadialColorPalette for color pickers, RadialFontListBox for font selection, RadialMenuSlider for numeric input, and Office 2016 themed menus for modern circular navigation beyond standard context menus.
Implement Syncfusion WinForms Rating control for star ratings and user feedback inputs. Use this when building product reviews, satisfaction surveys, or quality rating UIs in WinForms. Covers rating precision (standard/half), built-in shapes (star, circle, heart, diamond), custom image shapes, orientation and Office-themed gradient styling.
Implement Syncfusion SplashPanel control for creating customizable splash screens and notification popups in Windows Forms applications. Use when displaying application startup screens, loading indicators, or non-obtrusive notification popups. Covers splash screen configuration, animations (slide, fade, marquee), desktop alignment, child controls, auto-close timers, background gradients/images, and splash events for creating professional startup experiences.
Guide for implementing Syncfusion StatusBarAdv control in Windows Forms applications. Use when creating application status displays, bottom panels, or status information panels with StatusBarAdvPanel items. Covers installation, panel configuration, appearance styling, gradients, borders, themes, alignment, and event handling for enhanced status bar displays.
Implement Syncfusion StatusStripEx control for creating professional status bars in Windows Forms applications. Use when creating application status indicators with progress bars, status labels, buttons, and sizing grips. Covers StatusControl items (right-aligned), Notification items (left-aligned), ProgressBar integration, Office2007 color schemes (Silver/Blue/Black), Office2016 themes, custom managed colors, and sizing grip customization for bottom-docked status panels.
Implement Syncfusion TabSplitterContainer control for creating split-view layouts with tabbed panels in Windows Forms. Use when building Visual Studio-style split views, document editors with design/preview modes, or multi-pane applications. Covers primary/secondary page collections, swap button functionality, collapse/expand panes, horizontal/vertical orientation, adjustable splitter position, and Office2016 themes for professional multi-view interfaces.
Guide for implementing Syncfusion TileLayout control in Windows Forms applications. Use when creating Windows 8 Metro-style tile interfaces, grouped tile containers, live tiles with rotating images/text using ImageStreamer, drag-and-drop reordering, or dashboard-style layouts with customizable positioning and appearance.
Implement and configure Syncfusion TreeNavigator control for Windows Forms - a unique navigation interface that expands tree structures in-place without taking extra space. Use when you need hierarchical navigation with breadcrumb modes, drill-down capabilities, or space-efficient collapsible navigation menus. Covers in-place tree expansion, back button navigation, expandable menu items, file explorer-style navigation, and replacing standard TreeView with collapsible alternatives.
Implement and configure Syncfusion XPToolBar control for creating professional Visual Studio-style toolbars in Windows Forms applications. Use when you need customizable toolbar layouts with various item types (BarItem, ParentBarItem, DropDownBarItem, ComboBoxBarItem), dockable positioning, chevron overflow buttons, and Office themes. Covers toolbar structure, bar item management, docking positions, appearance customization with Office2007/2016 themes, and RTL support for creating feature-rich application toolbars and menu bars.
Best practices for the Terra API Streaming (Real-Time) API – live, roughly per-second biometric data from wearables over websockets. Use when building realtime streaming with Terra API, TerraRT SDKs, or wss://ws.tryterra.co; streaming live heart rate, steps, distance, acceleration, ECG, HRV, RR intervals, calories, MET, power, cadence, speed, location, or gyroscope; pairing a wearable over BLE or ANT+; producing sensor data from a mobile app; consuming a live stream on a backend; or streaming from an Apple Watch or Wear OS watch. Covers the producer/broker/consumer architecture, the websocket handshake and opcodes, token minting, close codes, replay/backfill, and per-platform SDK setup (iOS, Android, React Native, Flutter, Wear OS).
Integrate Three.js 3D scenes into Editframe compositions via addFrameTask. Scenes are pure functions of time, fully scrubable, and renderable to MP4. Use when creating 3D animations, WebGL content in compositions, or integrating Three.js with Editframe's timeline system.
Unity save/load system architecture. Serialization format selection, save data DTOs, versioning and migration, cloud sync, PlayerPrefs scoping, auto-save strategies, mobile persistence. DECISION format: WHEN/DECISION/SCAFFOLD/GOTCHA. Based on Unity 6.3 LTS.
Unity state and behavior system architecture. FSM, Hierarchical FSM, Behavior Trees, stack-based state machines, Animator-vs-code decisions, state machine testing. DECISION format: WHEN/DECISION/SCAFFOLD/GOTCHA. Based on Unity 6.3 LTS.
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.