Skills
97,501 packaged capabilities and playbooks for agents. Install any of them with one command.
Development
Spin up a portless + tmux dev session for the Workflow SDK that gives each git worktree isolated `<branch>.<name>.localhost` URLs for the Next.js workbench and the observability UI, plus a Claude statusline that surfaces those URLs. Use only when the user asks for a "portless dev session", a "tmux dev layout for workflow", "worktree-isolated dev URLs", or wants to wire workflow dev URLs into the Claude statusline. Do not activate for the generic "start the dev server" / "run pnpm dev" task.
Use this skill when gating access based on RevenueCat subscription state on Android. Covers reading CustomerInfo, checking entitlement.isActive as the single source of truth for access, and drilling into willRenew, periodType, and expirationDate when deeper logic is needed.
Implement the Syncfusion Markdown Converter in React to convert Markdown text into clean HTML. Use this when converting Markdown to HTML in React, integrating a live Markdown preview with the Rich Text Editor in Markdown mode, configuring GFM or line break options, or working with MarkdownConverter.toHtml() and MarkdownConverterOptions. This skill covers the @syncfusion/ej2-markdown-converter package and Markdown Editor integration with HTML preview in React applications.
Implements the Syncfusion React Range Navigator component for scrolling and navigating through data with range selection. Use this when users need time-based navigation, financial data visualization, or chart integration with a range selector control. Supports numeric, logarithmic, and DateTime data binding, multiple series types, period selector, lightweight mode, tooltips, RTL, and export/print functionality.
Upgrades a Capacitor plugin library from v7 to v8 using `npx @capacitor/plugin-migration-v7-to-v8@latest`, then the manual checklist - dev deps `^8.0.0` and peer `@capacitor/core` `>=8.0.0`, minSdk 24 and compile/target SDK 36 defaults, AndroidX dependency defaults, AGP 8.13.0, Gradle 8.14.3, Gradle `=` property assignment syntax, Java 21, Kotlin 2.2.20 (`kotlinOptions` to `compilerOptions`, no `kotlin-android-extensions`), google-services 4.4.4, iOS 15 in podspec and `Package.swift`, `capacitor-swift-pm` `from: "8.0.0"`, and the renamed `capacitor_bridge_layout_main` resource. Use when a plugin targets Capacitor 7 and must support 8, or on Kotlin 2 / Gradle space-assignment errors. Points to the v8-to-v9 next step. Do not use for app upgrades, other major versions, or non-Capacitor libraries.
Diagnose and fix broken OpenCLI adapters when websites change. Use when an opencli command fails with SELECTOR, EMPTY_RESULT, API_ERROR, or PAGE_CHANGED errors. Reads structured diagnostic output and uses browser automation to discover what changed and patch the adapter.
Full Sentry SDK setup for Next.js. Use when asked to "add Sentry to Next.js", "install @sentry/nextjs", or configure error monitoring, tracing, session replay, logging, profiling, AI monitoring, or crons for Next.js applications. Supports Next.js 13+ with App Router and Pages Router.
Implement Syncfusion React Linear Gauge for displaying measurements on a linear scale. Use this skill when users need temperature sensors, KPI indicators, progress gauges, or real-time monitoring dashboards. Covers axes configuration, pointer types, ranges, annotations, customization, animations, print/export, accessibility, and internationalization.
Control and inspect Amazon Fire TV (Vega) apps via argent — launch/restart/reinstall apps, read the on-screen element tree, navigate with the D-pad remote, type, and take screenshots. Use when the task mentions Vega, Fire TV, or VVD, or involves driving a Vega virtual device.
Upgrades a Capacitor app from v6 to v7 using `npx cap migrate` from `@capacitor/cli@latest-7`, then the manual checklist - Node 20+, Xcode 16+, iOS deployment target 14.0 (Xcode project and Podfile), Android Studio Ladybug with JDK 21, AGP 8.7.2, Gradle 8.11.1, minSdk 23, compile/target SDK 35, removed `bundledWebRuntime` and `cordova.staticPlugins` config, `navigation` in configChanges, and official plugin breaking changes (removed deprecated types like `AppUrlOpen`, `HapticsImpactStyle`, `DeviceBatteryInfo`; Device no longer returns disk sizes). Use when `@capacitor/core` is 6.x and the target is 7.x, or on errors like "Capacitor 7 requires JDK 21" or "Module 'X' has no exported member 'AppUrlOpen'". Do not use for other major versions, plugin library upgrades, or non-Capacitor apps.
Use this skill when managing the Android product catalog through the Play Console and the RevenueCat dashboard. Covers the two sided catalog flow (create in Play Console, import or map in RevenueCat), entitlement and offering maintenance, and why you do not call the Google Play Developer API directly.
A comprehensive guide to implementing the Syncfusion React TreeMap component. Use this skill when users need help creating hierarchical data visualizations, configuring drill-down interactions, applying color mapping, working with multiple hierarchy levels, customizing leaf items, or troubleshooting TreeMap data binding and display issues. Covers installation, data binding patterns, layouts, legends, tooltips, selection, accessibility, and advanced customization for interactive hierarchical data exploration.
Tailwind CSS advanced design systems with design tokens and @theme configuration. Proactively activate for: (1) building a design system on Tailwind v4, (2) the @theme directive and CSS-first configuration, (3) custom color scales (50-950) and semantic tokens, (4) typography scales and fluid type with clamp(), (5) spacing tokens and 8pt grids, (6) shadow systems, radius tokens, motion tokens, (7) light/dark mode tokens via @theme, (8) Figma to Tailwind token sync, (9) design-token tooling (Style Dictionary, Tokens Studio), (10) per-brand theming. Provides: @theme configuration templates, semantic-token naming conventions, a fluid-type calculator, a design-token sync workflow, and multi-brand theming patterns.
TypeScript-first schema validation and type inference. Use for validating API requests/responses, form data, env vars, configs, defining type-safe schemas with runtime validation, transforming data, generating JSON Schema for OpenAPI/AI, or encountering missing validation errors, type inference issues, validation error handling problems. Zero dependencies, compact core (~5kb gzipped; zod/mini ~1.9kb).
Expert Godot shader patterns for batch-safe hitflash, alpha-scissor foliage/dissolve, screenspace postFX, depth reconstruction, triplanar, and instance uniforms — not first-shader tutorials. Trigger on draw-call batching breaks, discard vs depth-prepass, foliage shadows, post-process quads, or world-position FX. Keywords: instance uniform, ALPHA_SCISSOR, hint_screen_texture, hint_depth_texture, global uniform, sampler2DArray, canvas_item, spatial, post-processing.
Upgrades a Capacitor app from v5 to v6 using `npx cap migrate` from `@capacitor/cli@latest-6`, then the manual checklist - Node 18+, Xcode 15+, Android Studio Hedgehog, AGP 8.2.1, Gradle 8.2.1, compile/target SDK 34, `compileSdkVersion` to `compileSdk`, the `androidScheme` default flipping to `https` (data loss risk), iOS local plugins no longer auto-registered, iOS zoom disabled by default, and official plugin breaking changes (`addListener` returns only a Promise, Camera Photo Picker, Filesystem ctime/mtime numbers). Use when `@capacitor/core` is 5.x and the target is 6.x, or after the upgrade users are logged out on Android, a custom iOS plugin is "not implemented", or `addListener(...).remove` no longer compiles. Do not use for other major versions, plugin library upgrades, or non-Capacitor apps.
Build and migrate Android apps with Kotlin, Jetpack Compose, MVVM, Hilt, Room 3 (KSP, SQLiteDriver, Flow/suspend DAOs), Navigation3, and multi-module Gradle. Use for new projects or modules, Compose screens and ViewModels, Room 3 and RemoteMediator, API 37 / targetSdk migration, Play Integrity client wiring, offline-first sync, and version-catalog alignment. Not for iOS, Flutter, React Native, KMP-only shared code without an Android app module, or backend-only APIs with no Android client.
Build, inspect, or revise cmux custom sidebar views using the runtime SwiftUI-style interpreter. Use for sidebar vibe coding, custom sidebars in Bonsplit panes, left sidebar picker previews, interpreted Swift sidebars, ~/.config/cmux/sidebars/*.swift, cmux docs sidebars, or Aziz's Swift interpreter work.
Ninja build system skill. Use when diagnosing Ninja build failures, understanding Ninja's role as a low-level build executor generated by CMake or other meta-build systems, tuning parallelism, interpreting Ninja output, or working with build.ninja files. Activates on queries about ninja errors, ninja parallelism, ninja verbose output, build.ninja format, or ninja as a CMake generator.
heaptrack memory profiler skill for Linux. Use when tracking heap allocations, finding memory leaks, measuring peak heap usage, identifying allocation hotspots, or comparing allocation behaviour between runs. Activates on queries about heaptrack, heap profiling, memory allocation analysis, heaptrack_print, allocation hotspots, or memory leak detection with heaptrack.
Apple HIG guidance for Apple technology integrations: Siri, Apple Pay, HealthKit, HomeKit, ARKit, machine learning, generative AI, iCloud, Sign in with Apple, SharePlay, CarPlay, Game Center, in-app purchase, NFC, Wallet, VoiceOver, Maps, Mac Catalyst, and more. Use when asked about: "Siri integration", "Apple Pay", "HealthKit", "HomeKit", "ARKit", "augmented reality", "machine learning", "generative AI", "iCloud sync", "Sign in with Apple", "SharePlay", "CarPlay", "in-app purchase", "NFC", "VoiceOver", "Maps", "Mac Catalyst". Also use when the user says "how do I integrate Siri," "what are the Apple Pay guidelines," "how should my AR experience work," "how do I use Sign in with Apple," or asks about any Apple framework or service integration. Cross-references: hig-inputs for input methods, hig-components-system for widgets.
Design and ship production-ready MCP (Model Context Protocol) servers from OpenAPI contracts instead of hand-written tool wrappers. Python and TypeScript support, schema validation, safe evolution. Use when exposing an existing API as an MCP server, building tool integrations for Claude or Codex or Cursor, or scaffolding an MCP project from scratch.
Tailwind CSS v4 performance optimization and best practices guidelines (formerly tailwindcss-v4-style). Use this skill when writing, reviewing, or refactoring Tailwind CSS v4 code to ensure optimal build performance, minimal CSS output, and correct usage of v4 features. Triggers on tasks involving Tailwind configuration, @theme directive, utility classes, responsive design, dark mode, container queries, or CSS generation optimization.
Upgrades a Capacitor app from v4 to v5 using `npx cap migrate` from `@capacitor/cli@latest-5`, then the manual checklist — Node 16+, Xcode 14.1+, Android Studio Flamingo with JDK 17, AGP 8.0.0, Gradle 8.0.2, compile/target SDK 33, `package` moved from AndroidManifest.xml to `namespace` in build.gradle, Jetifier removal, pinning `androidScheme` to `http`, and official plugin breaking changes (Device `uuid` to `identifier`, Android 13 notification permissions, READ_MEDIA_IMAGES). Use when `@capacitor/core` is 4.x and the target is 5.x, or on errors like "Namespace not specified" or "Android Gradle plugin requires Java 17". Do not use for other major versions, plugin library upgrades, or non-Capacitor apps.
Publish and deploy C# MCP servers. Covers NuGet packaging for stdio servers, Docker containerization for HTTP servers, Azure Container Apps and App Service deployment, and publishing to the official MCP Registry. Use for: packaging stdio MCP servers as NuGet tools, creating Dockerfiles for HTTP MCP servers, deploying to Azure Container Apps or App Service, publishing to the MCP Registry at registry.modelcontextprotocol.io, configuring server.json for MCP package metadata, setting up CI/CD for MCP server publishing. Do not use for: publishing general NuGet libraries (not MCP-specific), general Docker guidance unrelated to MCP, creating new servers (use mcp-csharp-create), writing tests (use mcp-csharp-test).
Master TypeScript's advanced type system including generics, conditional types, mapped types, template literals, and utility types for building type-safe applications. Use when implementing complex type logic, creating reusable type utilities, or ensuring compile-time type safety in TypeScript projects.
CodeStable is an AI coding workflow for serious software engineering that keeps humans in the loop. Rather than centering on Agent orchestration, it organizes requirements, architecture, features, issues, and historical decisions to make development driven by Codex and Claude controllable, traceable, and continuously evolvable.
Plans and executes turning an existing web app, PWA, or SPA into a store-ready Capacitor iOS and Android app. Use when the user wants to wrap a website or PWA as a mobile app, worries about Apple guideline 4.2 minimum functionality or thin-WebView rejection, needs a phased migration plan (static build, Capacitor shell, native UX, plugins, permissions, offline, account deletion, in-app purchase vs web billing, demo account, Play closed testing), or asks what still breaks after the first successful cap sync. Do not use for framework build configuration alone (framework-to-capacitor), Cordova apps (cordova-to-capacitor), final store submission mechanics (capacitor-app-store), or an Apple rejection audit (capacitor-apple-review-preflight).
Expert guidance for designing, assessing, and optimizing Azure workloads using Azure Well Architected. Covers design review checklists, recommendations, design principles, tradeoffs, service guides, workload patterns, and assessment questions. Use when designing AI/HPC/SaaS workloads, AVD/AVS deployments, WAF assessments, or App Service/AKS/SQL architectures, and other Azure Well Architected related development tasks
Upgrades a Capacitor plugin library from v4 to v5 using `npx @capacitor/plugin-migration-v4-to-v5@latest`, then the manual checklist - `@capacitor/*` dev deps to `latest-5`, compile/target SDK 33 defaults, AGP 8.0.0, Gradle 8.0.2, `namespace` in build.gradle instead of manifest `package`, Java 17, Jetifier removal, Kotlin 1.8.20 with `kotlin-stdlib`, plus code changes - `CAPBridgedPlugin` requirements moved to instance level (`pluginId` -> `identifier`, `pluginMethods` typed `[CAPPluginMethod]`) and Android `PluginCall.getObject()` / `getArray()` may return null. Use when a plugin's peer dependency is Capacitor 4 and it must support 5, or apps on v5 fail with "Namespace not specified" in the plugin module. Do not use for app upgrades, other major versions, or non-Capacitor libraries.
You MUST use this when a project-scoped GitHub CLI (gh) command is about to run on github.com, including every subsequent command in the same session, or when checking or switching the project's GitHub account, and before the first project-scoped GitLab API or glab call in a project whose .env/.env names GL_ACC. Also applies after gh or GitLab access failures. Not for plain git, SSH, gh help or version output, authentication setup, or GitHub hosts other than github.com.
Implements Next.js crawlability, metadata, canonicals, status codes, JSON-LD, hreflang, and crawler policy with served-page evidence. Use when asked to "fix SEO", "add a sitemap", "fix soft 404s", or "add llms.txt". For demand research, briefs, or Search Console monitoring use seo-program.
Use this skill to orient an agent to the architecture of the RevenueCat Android SDK (10.x). Covers how RevenueCat reorganizes BillingClient, the Google Play Developer API, and RTDN into a single SDK, and how Products, Packages, Offerings, Entitlements, and CustomerInfo connect.
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.