Skills
97,222 packaged capabilities and playbooks for agents. Install any of them with one command.
Design & UI
Implements and customizes the Syncfusion .NET MAUI DataGrid (SfDataGrid) for displaying tabular data. Use when working with MAUI data grids, SfDataGrid, tabular data display, data binding to grids, or column configuration. Covers cell editing, sorting, filtering, grouping, paging, exporting to Excel/PDF, row operations, selection, and summaries.
Implements the Syncfusion .NET MAUI DatePicker (SfDatePicker) control for date selection. Use when implementing date pickers, adding date selection UI, or working with the SfDatePicker control. Covers date picker appearance customization (headers, footers, columns), date formatting (20+ predefined formats), date restrictions (min/max dates, blackout dates), and picker modes (Dialog, RelativeDialog).
Implements Syncfusion® .NET MAUI Popup (SfPopup) control for displaying alert messages, custom views, and modal dialogs. Use when working with popups, overlays, dialogs, modal windows, alert boxes, or confirmation dialogs in .NET MAUI applications. Covers positioning (center, absolute, relative to view), layout customization (header, footer, content templates), animations, and modal behavior
Generate a single-file MCP App widget for an MCP tool, with either bundled runtime code or user-approved public CDN imports. Describe the visual and provide a plain structured payload or a full tool result with content, structuredContent, and meta.
Analyze a public or local reference video, isolate a time range, deconstruct its layout, motion, timing, and transitions, then build an original verified motion replica with reusable templates and final MP4 QC. Use when the user says 复刻这个视频效果, 参考这个视频做同款动效, 拆解前 N 秒, 还原方框/连线/卡片动画, or provides a video or URL as a motion reference rather than asking to copy its footage or script.
Implements Syncfusion® .NET MAUI AI AssistView (SfAIAssistView) for AI-powered interactive chat interfaces. Use when working with AI chat interfaces, AI AssistView, SfAIAssistView, conversational UI, or chat with AI responses. Covers integrating AI services, creating chat UIs, implementing conversation flows, managing AI requests/responses, and displaying AI suggestions
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.
Prepare and conduct user interviews that extract truth, not validation. Use when asked to create an interview guide, prepare for user interviews, plan customer discovery, or talk to users. Built on The Mom Test and YC's Five Questions framework for startup customer development.
Design and build the visual layer of a long-form talking-head video as one persistent world the camera moves through, instead of a sequence of separate graphics. Use when asked to edit a video, add motion graphics, design the visuals for a script, plan an edit, or fix an edit judged confusing, text-heavy, hard to follow, or "clearly made by an AI". Covers the persistent world, camera grammar, the spotlight rule, spatial open loops, ornament and token discipline, transcript timing, and the verification gates.
Build an animation from scratch, making the decisions in the order that determines whether it feels right — should it animate at all, what purpose, which tool, which properties, which curve and duration, how it interrupts, how it exits. Writes the implementation. Use when asked to animate something, add motion, make a component feel alive, or build a transition. For critiquing existing motion use review-animations; for auditing a whole codebase use improve-animations.
Build animations in React Native and Expo, making the decisions in the order that determines whether they feel right — should it animate, which thread it runs on, which properties, spring or timing, how the gesture hands off, how it degrades. Writes the implementation with Reanimated, Gesture Handler, Expo Router and expo-haptics. Use when animating anything in an Expo app, adding gestures, sheets, screen transitions, press feedback or haptics, or fixing motion that stutters on device. For web animation use `animate`.
Reverse-lookup glossary that turns a vague description of a web animation or motion effect into its exact term ("the bouncy thing when a popover opens" → Pop in; "the iOS rubber-band scroll" → Rubber-banding). Use when the user asks "what's it called when…", or describes a motion effect without knowing its name and wants the right word to prompt an AI or designer with. For naming an effect, not designing or building one.
Apple's approach to interface design and fluid, physical motion, translated for the web. Use when building or reviewing gesture-driven UI, spring animations, drag/swipe/sheet interactions, momentum and interruptible transitions, translucent materials and depth, typography (optical sizing, tracking, leading), reduced-motion, or the design foundations (feedback, spatial consistency, restraint) behind Apple-style interfaces.
Guide to Sonner, the React toast library — install and wire up the Toaster, pick the right toast() call, promise and loading toasts, updating, dismissing and persisting toasts, styling, theming and icons, positioning and multiple toasters. Use when working with Sonner or troubleshooting it — toasts that don't appear, appear twice, lose their styles, ignore Tailwind classes, sit behind a modal, or don't follow dark mode.
Create architectural floor plans and interior layouts using drawio XML format with building-standard symbols. Best for office layouts, home floor plans, evacuation plans, and seating arrangements. Built on drawio with floorplan-specific stencils. NOT for simple diagrams (use mermaid) or UI wireframes (use wireframe skill)
Plan a user interview topic in PostHog — pick who to target (cohort, emails, or PostHog distinct IDs), draft what to ask about, and prepare the voice-agent context plus a question list. Use when the user asks to "talk to users", "check how users feel about X", "interview some customers", "set up a user interview", "run a user-research call", "find users to ask about Y", or otherwise wants qualitative feedback through a conversation. Walks the user through targeting (cohorts-list, persons-list, or accepting emails / distinct IDs directly), captures the topic, and prompts for agent context and questions before calling user-interview-topics-create. Cohort targeting is resolved to explicit emails/distinct_ids at create time — topics snapshot their audience and do not re-evaluate cohort membership later. Do NOT trigger when the user is uploading a recorded interview audio file (that's the separate UserInterview/transcript flow) or only browsing existing topics with user-interview-topics-list.
Build virtualized lists, grids, and tables with react-virtuoso. Use when (1) rendering large or infinite lists, (2) building grouped lists with sticky headers, (3) virtualizing HTML tables, (4) laying out same-sized items in a responsive grid, (5) building feeds or logs that follow new items at the bottom, (6) diagnosing virtualization issues such as jumpy scrolling, lists that won’t scroll to the bottom, overlapping items, blank items, or “zero-sized element” errors, or (7) working with Virtuoso, GroupedVirtuoso, VirtuosoGrid, TableVirtuoso, VirtuosoHandle, itemContent, followOutput, or firstItemIndex
Implements Syncfusion .NET MAUI Tab View (SfTabView) controls for tab navigation interfaces and tabbed content layouts. Use when working with tab controls, tab navigation, nested tabs, or swipeable content in .NET MAUI applications. This skill covers tab bar customization, tab item configuration, swipe gestures, events, and visual customization including indicators and Liquid Glass effects.
Implements Syncfusion .NET MAUI Text Input Layout (SfTextInputLayout). Use when adding decorative elements like floating labels, icons, assistive labels, or containers to Entry, Editor, Autocomplete, or ComboBox controls. Covers text input layout setup, hint labels, helper text, error messages, character counter, and password visibility toggle.
Comprehensive animation reference from iOS 13 through iOS 26. Use when implementing SwiftUI animations, understanding VectorArithmetic, using the @Animatable macro, zoom transitions, UIKit/AppKit animation bridging, choosing between spring and timing curve animations, or debugging animation behavior
Generate professional infographics with 21 layout types and 22 visual styles. Analyzes content, recommends layout×style combinations, and generates publication-ready infographics. Use when user asks to create "infographic", "信息图", "visual summary", "可视化", or "高密度信息大图".
CustomShader authoring — vertexShaderText and fragmentShaderText against VertexInput, FragmentInput, FeatureIds, Metadata, czm_modelMaterial. Use when reading EXT_mesh_features or EXT_structural_metadata property textures/tables, vertex displacement, or shading VoxelPrimitive
Design and build cinematic websites, interactive portfolios, product stories, and real-time 3D experiences with subject-specific art direction and scroll choreography. Use for new builds, redesigns, motion improvements, scroll audits, or storyboards in standalone HTML and existing apps; includes responsive, reduced-motion, and static fallbacks. Not for ordinary dashboards or unrelated animation.
Search a codebase or UI for places that don't animate but should, and reject everything that shouldn't. Read-only; it proposes motion with exact values, it does not implement it. Use when the user asks "what could be animated here?" or wants to "make this feel more alive". For fixing existing animations, use improve-animations or review-animations instead.
Survey a codebase's animation and motion code as a senior motion advisor, then produce a prioritized audit and self-contained implementation plans for other agents (or cheaper models) to execute. Read-only on source code — it plans improvements, it does not apply them. Use when the user asks to "improve the animations", "audit the motion", "make this app feel better", or wants a roadmap of animation fixes rather than a review of a single diff.
Use when generating consulting-grade slide decks, MBB-style presentations, McKinsey/Bain/BCG-format slides, board prereads, executive readouts, recommendation decks, market entry decks, due diligence decks, or any business presentation that requires action-title storylines, pyramid-principle structure, MECE bullets, and a clean editorial visual system rendered to a real .pptx file.
Pick the right library for a given frontend task from a curated, opinionated list — numbers, OTP inputs, charts, command menus, virtualization, drag and drop, toasts, state, styling, and more. Only runs when explicitly invoked; it does not trigger on its own.
Use Shopify Polaris Web Components (s-* custom elements) for App Home UI. Use when building App Home surfaces (not embedded apps), designing UI with s-page, s-section, s-stack, s-box, s-button, and other s-* components. Do not use @shopify/polaris React - App Home requires Web Components
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.