Skills
96,770 packaged capabilities and playbooks for agents. Install any of them with one command.
Design & UI
Implements Syncfusion .NET MAUI TimePicker (SfTimePicker) control. Use when implementing time selection, time picker controls, or time input UI in .NET MAUI. This skill covers installation, configuration, time formats (14 predefined formats), picker modes (Dialog/RelativeDialog), intervals, time restrictions, looping, events, and customization.
Build, review, debug, migrate, or plan Tailwind Variants class systems with current docs. Use for tailwind-variants, tv, createTV, cn, cnMerge, cx, VariantProps, slots, compoundVariants, compoundSlots, defaultVariants, extend composition, twMergeConfig, /lite build, class overrides, TypeScript props, Tailwind CSS v4 pairing, and upgrades from v0/v1/v2/v3.x to v3.3.1.
TheSys C1 Generative UI API (@thesysai/genui-sdk with @crayonai/react-ui) for React apps that stream interactive components such as forms, charts, and tables instead of plain text LLM output. Covers integration for Vite + React, Next.js, and Cloudflare Workers with OpenAI, Anthropic Claude, or Workers AI backends, plus C1Component and ThemeProvider, tool calling with Zod schemas, theming, thread management and persistence, and production deployment. Use when building conversational UIs, AI assistants and copilots, AI-generated dashboards, or dynamic forms, or when debugging empty agent responses, streaming and response transformation failures, ignored system prompts, themes not applying, SDK/API version mismatches, CORS failures, or rate limit crashes.
The technical-verification layer of the thumb-first mobile suite — finds and fixes objective platform defects in mobile web apps and PWAs (iOS Safari, Android Chrome). Covers viewport/100vh bugs, safe-area insets, touch targets and tap delay, service workers, web push, PWA manifest, and Core Web Vitals — with file/line defects and fixes, not opinions. Target-aware: full coverage for web/PWA; for native apps (React Native, Expo, SwiftUI, Flutter) it detects the target and hands off to a native skill if one is installed, otherwise states plainly that it does not do native-platform audits. Use for mobile-web/PWA technical audits, safe-area/notch issues, 100vh overflow, service-worker/offline, install/manifest, or mobile performance. Usually run via the /thumb-first umbrella (which also runs the design pass); invoke directly for technical checks only.
Tool lifecycle UI components for React/Next.js from ui.inference.sh. Display tool calls: pending, progress, approval required, results. Capabilities: tool status, progress indicators, approval flows, results display. Use for: showing agent tool calls, human-in-the-loop approvals, tool output. Triggers: tool ui, tool calls, tool status, tool approval, tool results, agent tools, mcp tools ui, function calling ui, tool lifecycle, tool pending
Tool lifecycle UI components for React/Next.js from ui.inference.sh. Display tool calls: pending, progress, approval required, results. Capabilities: tool status, progress indicators, approval flows, results display. Use for: showing agent tool calls, human-in-the-loop approvals, tool output. Triggers: tool ui, tool calls, tool status, tool approval, tool results, agent tools, mcp tools ui, function calling ui, tool lifecycle, tool pending
Set type like it was chosen, not defaulted. Typeface selection, size scales for product versus reading UI, line height and tracking by size, measure, hierarchy through weight and colour rather than size, tabular numerals, OpenType features, text wrapping, truncation, mono for data, font loading. Use when choosing fonts, building a type scale, fixing hierarchy, or when an interface looks "generic", "off" or "like a template" and the cause is text.
Codex UI anti-slop workflow for frontend design and implementation. Use automatically when Codex builds, reviews, fixes, styles, redesigns, or improves user interfaces: landing pages, dashboards, app UI, admin panels, editors, checkout and pricing flows, docs, mobile UI, visual QA, screenshots, DESIGN.md design systems, or when the user says ai-slop, anti-slop, visual contract, make it look better, less generic, or invokes $ui-anti-slop-codex / ui-anti-slop-codex.
Map user journeys, screen flows, and interaction sequences for web applications. Use this skill when the user wants to plan how users move through screens, define multi-step workflows, map user journeys, design navigation structures, or think through interaction flows. This includes onboarding flows, checkout processes, CRUD workflows, settings management, error recovery paths, or any multi-screen user experience. Also trigger when the user mentions 'user flow', 'screen flow', 'journey map', 'interaction design', or 'workflow'
Evaluate UI designs and implementations against established UX principles. Use this skill when the user wants a UX heuristic evaluation, usability review, UX critique, or analysis of a design against best practices. Triggers include: 'evaluate the UX', 'heuristic evaluation', 'UX review', 'usability critique', 'does this follow UX best practices', 'what UX issues do you see', 'critique this design', 'review this flow', or when the user provides a screenshot or HTML file and asks for UX feedback. Also trigger when users reference specific heuristics like 'visibility of system status', 'Fitts's Law', 'Hick's Law', 'cognitive load', or any of Nielsen's heuristics or Laws of UX by name.
Suite of tools for creating elaborate, multi-component claude.ai HTML artefacts using modern frontend web technologies (React 19, Tailwind CSS v4, shadcn/ui). Use for complex artefacts requiring state management, routing, or shadcn/ui components - not for simple single-file HTML/JSX artefacts.
Red envelope cover design — a WeChat red envelope cover design skill that generates cover design images compliant with the WeChat red envelope cover open platform specification, including the cover image, cover accessory, bubble accessory and cover story assets. This skill helps users design a complete asset suite from scratch that meets the WeChat red envelope cover platform standards, ensuring all assets pass platform review smoothly and present a professional, festive visual effect.
Declarative UI widgets from JSON for React/Next.js from ui.inference.sh. Render rich interactive UIs from structured agent responses. Capabilities: forms, buttons, cards, layouts, inputs, selects, checkboxes. Use for: agent-generated UIs, dynamic forms, data display, interactive cards. Triggers: widgets, declarative ui, json ui, widget renderer, agent widgets, dynamic ui, form widgets, card widgets, shadcn widgets, structured output ui
Progressive UX generation — Phase 1 generates 5 B&W wireframe options instantly (1 safe + 4 exploratory), then Phase 2 renders Clean + Polished color variants via 5 parallel Task agents (one per option). Supports wireframes-only or wireframes+visuals. Extracts optimization intent from arguments when present. Maintains persistent design context. Use when user says "wireframe", "prototype", "UX options", or "layout exploration".
Master accessibility audit skill that scans every screen with axe-core, tests keyboard navigation, checks focus visibility, audits ARIA and semantic structure, then fixes every violation from critical down to minor. Works screen by screen in priority order with visual and programmatic verification. Use when user wants to fix accessibility issues, meet WCAG 2.1 AA, improve keyboard nav, or invokes /a11y.
Complete or redo favicon.svg for documentation sites, frontend sites, or multiple sites in a monorepo. Must be used when the user mentions favicon, browser tab icons, Iconify, Lucide style, VitePress/VuePress documentation sites, public/favicon.svg, head link icon, or that the icon is ugly / a mess / should have no background block; especially suited to designing local SVG favicons for multiple VitePress sites in bulk and configuring head explicitly.
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
This skill should be used when the user asks about Bootstrap forms, Bootstrap form controls, Bootstrap input fields, Bootstrap select, Bootstrap checkboxes, Bootstrap radio buttons, Bootstrap switches, Bootstrap range inputs, Bootstrap input groups, Bootstrap floating labels, Bootstrap form validation, Bootstrap form layout, Bootstrap toggle buttons, how to create Bootstrap forms, needs help with form styling and validation in Bootstrap, wants to create a form, add form validation, style form inputs, make an inline form, add floating labels to inputs, create a login form, build a registration form, or validate user input.
This skill should be used when the user asks about Bootstrap utilities, Bootstrap spacing utilities, Bootstrap margin utilities, Bootstrap padding utilities, Bootstrap display utilities, Bootstrap flex utilities, Bootstrap text utilities, Bootstrap color utilities, Bootstrap background utilities, Bootstrap border utilities, Bootstrap shadow utilities, Bootstrap sizing utilities, Bootstrap position utilities, Bootstrap visibility utilities, Bootstrap overflow utilities, Bootstrap opacity utilities, Bootstrap float utilities, Bootstrap vertical align utilities, Bootstrap link utilities, or needs help with Bootstrap utility classes.
Use this skill when a product engineer wants to build, migrate, or extend UI using the Earth Design System (EDS, `@adaptavant/eds-core`). Triggers include any mention of 'build with EDS', 'use EDS', 'EDS component', 'migrate to EDS', 'convert to EDS', references to `@adaptavant/eds-core`/`@adaptavant/eds-icons`, or requests like "add a form/page/modal using EDS". Acts as a co-author/buddy that builds working EDS-compliant JSX immediately from a clear request, enforcing EDS guardrails along the way. Do NOT use this skill for fixing bugs inside the EDS library itself (use `/bug-fix-workflow`) or for writing PR descriptions (use `pull-request-author`).
Research-backed customer persona creation with market data and avatar generation. Covers demographics, psychographics, jobs-to-be-done, journey mapping, and anti-personas. Use for: marketing strategy, product development, UX research, sales enablement, content strategy. Triggers: customer persona, buyer persona, user persona, target audience, ideal customer, customer profile, audience research, user research, icp, ideal customer profile, target market, customer avatar, audience persona
Data visualization, dashboard design, and diagram expert with bundled ECharts theme, chart templates, D2 diagram templates, and CSS/HTML data-enriched diagram patterns. Use this skill whenever the user is building charts, dashboards, KPI cards, data tables, diagrams, flowcharts, or any visual representation of data or system structure — even if they don't explicitly say "dataviz." Triggers on: Recharts, ECharts, chart components, bar/line/scatter charts, dashboard layout, KPI cards, sparklines, data storytelling, metric visualization, heatmaps, treemaps, sankey, color palettes for data, axis labels, chart titles, data-ink ratio, flowcharts, process flows, architecture diagrams, sequence diagrams, ERDs, org charts, system diagrams, pipeline visualizations, D2 diagrams, or any request to "show data", "visualize metrics", "draw a diagram", "diagram the architecture", or "show the flow." Also use when reviewing existing charts or diagrams for quality, accessibility, or design improvements. If you see a chart or diagram being built or discussed, this skill applies.
Analyze any website's UI style using ChromeDevTools to extract precise CSS tokens, animations, and interaction states. Handles complex sites and anti-bot measures by guiding the user. Triggers on "analyze this site", "extract UI style", "create design system from [URL]", or "learn visual style".
Edit one or more existing Phat prototype pages by prototype revision ID while preserving unrelated pages and confirmed requirements. Use when the user references an ID such as home-v1 or booking-v2 and wants targeted visual, layout, content, state, navigation, or interaction changes before specification.
Email marketing design with layout patterns, subject line formulas, and deliverability rules. Covers welcome sequences, promotional emails, transactional templates, and mobile optimization. Use for: email marketing, newsletter design, drip campaigns, email templates, transactional emails. Triggers: email design, email template, email marketing, newsletter design, email layout, email campaign, drip campaign, welcome email, promotional email, transactional email, email subject line, email header image, email banner
Audit and improve Flutter accessibility, inclusive interaction, localization safety, and RTL behavior. Use for screen-reader semantics, focus and keyboard navigation, text scaling, contrast, touch targets, reduced motion, form errors, RTL, localization, or accessibility acceptance checks.
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.