Next.js 16+ and Turbopack — incremental bundling, FS caching, dev speed, and when to use Turbopack vs webpack.

Analyzes and optimizes application performance across frontend, backend, and database layers. Use when diagnosing slowness, improving load times, optimizing queries, reducing bundle size, or when asked about performance issues.

Astro-specific performance optimizations for 95+ Lighthouse scores. Covers critical CSS inlining, compression, font loading, and LCP optimization. Use when optimizing Astro site performance, improving Astro Lighthouse scores, or configuring astro-critters. Do NOT use for non-Astro sites (use perf-web-optimization or core-web-vitals) or running Lighthouse audits (use perf-lighthouse).

React 19 patterns with React Compiler. Trigger: When writing React components - no useMemo/useCallback needed.

Diagnose and fix React codebase health issues. Use when reviewing React code, fixing performance problems, auditing security, or improving code quality.

Run after making React changes to catch issues early. Use when reviewing code, finishing a feature, or fixing bugs in a React project.

React Native gotchas and decision criteria. Covers FlatList optimization, storage hierarchy, and platform-specific pitfalls.

Use this agent when you need to write, review, or refactor React code following specific architectural patterns and technology choices. This includes creating new components, implementing features, fixing bugs, or modernizing existing React code to align with modern best practices using Tailwind v4, Vite, TypeScript, and the specified stack.

Generate TSDoc comments for React components and hooks

Delegating tasks to Gandalf, a Lerian AI teammate reachable over Tailscale, and returning its response. Use when you need to publish an HTML/markdown report to Alfarrabio and get a URL, post a Slack notification, or ask Gandalf for business/product context via a full agent session. Tailscale-network only, no auth token. Skip when off the Tailscale network or the task can be done locally.

Validating a completed task against its acceptance criteria, mapping each AC to evidence, and gating completion on explicit user sign-off (self-approval prohibited). Gate 5 of ring:running-dev-cycle / ring:running-dev-cycle-frontend, run at task cadence after ring:reviewing-code. Use when implementation and tests are done and you need approval to close the task. Skip outside a dev-cycle, or for doc-only or non-code tasks.

Sets up a Vite + React frontend with S3 and CloudFront hosting. Use when setting up frontend hosting, CDN, static file serving, or creating the React app.

Full-stack React framework powered by TanStack Router with SSR, streaming, server functions, and deployment to any hosting provider.

Framework-agnostic, immutable reactive data store with framework adapters for React, Vue, Solid, Angular, and Svelte.

Tauri 2.0 project setup, Rust backend + web frontend, plugin system, IPC commands, security model, auto-update, and mobile support. Use when building lightweight cross-platform desktop or mobile apps with Tauri.

Three.js and React Three Fiber patterns, scene graph management, disposal, and TypeScript conventions

TypeScript coding style enforcement (ESLint, type safety, React patterns). Auto-loads when writing or reviewing TypeScript/JavaScript code.

Auto-triggering guide for fullstack-agents — ensures Claude automatically invokes the right code generation, review, and debugging skills before writing any FastAPI or Next.js code.

Create interactive HTML artifacts for academic papers using parallel subagent processing. Includes comprehensive pre-submission review checklist for paper quality assurance.

AlpineJS best practices and patterns. Use when writing HTML with Alpine.js directives to avoid common mistakes like long inline JavaScript strings.

Accessibility guide for Capacitor apps covering screen readers, semantic HTML, focus management, and WCAG compliance. Use this skill when users need to make their app accessible.

Comprehensive coding standards for TypeScript/JavaScript projects with React. Use when writing new code, refactoring, or setting up project structure. Focuses on e2e type-safety, readability, and maintainability. Apply to any code creation, file structuring, or technical decision-making tasks.

Core principles and project structure for React 19 SPA development. Covers stack overview, project organization, agent execution rules, and authoritative sources. Use when planning new projects, onboarding, or reviewing architectural decisions.

Convert CSS files to Tailwind utility classes. Use when migrating from vanilla CSS to Tailwind.

Audit and fix animation performance issues including layout thrashing, compositor properties, scroll-linked motion, and blur effects. Use when animations stutter, transitions jank, or reviewing CSS/JS animation performance.

Review code for bugs, security vulnerabilities, performance issues, accessibility gaps, and CLAUDE.md workflow compliance. Supports any tech stack - HTML/CSS/JS, React, TypeScript, Node.js, Python, NestJS, Next.js, and more. Use when completing features, before commits, or reviewing pull requests.

Guide feature development for full-stack applications with architecture focus. Covers Next.js App Router patterns, NestJS backend services, database models, data workflows, and seamless integration. Use when adding new features, refactoring existing code, or planning major changes.

OpenTelemetry-backed tracing, structured logs, metrics with rollups, alerts, sampling, and baggage for the engine — emit and query telemetry through `engine::*` functions and react to logs with a `log` trigger.

Initialize stacklane baseline using deterministic scripts and optional adapter profiles (nextjs/tanstack, railway/flyio).

Set up JWT authentication for both .NET APIs and React microfrontends with proper token handling and authorization

Security anti-pattern for mutation XSS (mXSS) vulnerabilities (CWE-79 variant). Use when generating or reviewing code that sanitizes HTML content, handles user-provided markup, or processes rich text. Detects sanitizer bypass through browser parsing mutations.

Upgrade Next.js to the latest version following official migration guides and codemods

Turn a run's persisted state into a self-contained HTML slideshow report — objective, decisions, graph, gates, evals, artifacts, failures, and the recommended next run. Use when a long or important run needs a legible, shareable summary instead of scrolling raw logs.

Build responsive layouts with CSS Grid, Flexbox, and container queries. Use when creating responsive designs, fixing layout issues, or building mobile-first layouts.

Frontend development skill for React, Next.js, TypeScript, and Tailwind CSS applications. Use when building React components, optimizing Next.js performance, analyzing bundle sizes, scaffolding frontend projects, implementing accessibility, or reviewing frontend code quality.

Slack tool actions: send/read/edit/delete messages, react, pin/unpin, list pins/reactions/emoji, member info.

Create Twig templates for pages and partials. Use for HTML rendering.

Configure Vite, TypeScript, Biome, and Vitest for React 19 projects. Covers build configuration, strict TypeScript setup, linting/formatting, and testing infrastructure. Use when setting up new projects or updating tool configurations.

Vue 3 gotchas and decision criteria. Covers reactivity traps, Composition API pitfalls, and Pinia patterns.

Best practices for developing zensical/Material for MkDocs static sites. Covers installation, virtual environments, project structure, responsive images, CSS, media embedding, and verification. Use for ANY Material for MkDocs project development beyond basic text editing.

Spin up a mock REST API server from JSON files in seconds. Full CRUD, filtering, pagination. Zero config. Free CLI tool for frontend developers.

Verify code quality by running build and lint commands for both .NET and React projects

CSS animation adapter patterns for HyperFrames. Use when authoring CSS keyframes, animation-delay based timing, animation-fill-mode, animation-play-state, or CSS-only motion that HyperFrames must seek deterministically during preview and rendering.

Debugs errors, test failures, and unexpected behavior with systematic root-cause analysis. Use when the user reports a bug, says "this isn't working", a test is failing, an exception is thrown, output is wrong, or asks to investigate "why does X happen". Applies to frontend, backend, database, network, and performance issues.

Safely handles API responses to prevent crashes from malformed JSON, HTML error pages, or unexpected response types. Use any time calling API endpoints.

Guide feature development for static HTML/CSS/JS sites. Covers patterns, automation workflows, and content validation. Use when adding features, modifying automation, or planning changes.

Inspect React Compiler (babel-plugin-react-compiler) output. Use for "compiler output", "see compiled", "why isn't this memoized", or comparing original vs compiled components.

DEPRECATED — superseded by /paper-poster-html. Kept only as a redirect for muscle memory; do not use for new posters.

React and Next.js performance playbook distilled from Vercel Engineering guidance. Use when building, reviewing, or refactoring React/Next.js code for waterfalls, bundle size, rendering cost, and client/server data flow.

Run after making React changes to catch issues early. Use when reviewing code, finishing a feature, or fixing bugs in a React project.

Run after making React changes to catch issues early. Use when reviewing code, finishing a feature, or fixing bugs in a React project.

Interactive screen reader simulation for education and debugging. Parses HTML/JSX and produces step-by-step narration of what a screen reader would announce. Supports reading order, Tab navigation, heading navigation (H key), and form navigation (F key) modes. Not a replacement for real screen reader testing.

Diagnose and fix Lingui SWC plugin compatibility errors with Next.js, Rspack, or other SWC runtimes. Use when seeing errors like "failed to invoke plugin", "failed to run Wasm plugin transform", "out of bounds memory access", or "LayoutError" during builds with @lingui/swc-plugin.

Complete reference for Tailwind CSS utility classes

Complete Tailwind CSS utility classes reference - Layout, spacing, typography, colors, borders, effects

Deploy and configure applications on Vercel. Use when deploying Next.js apps, configuring serverless functions, setting up edge functions, or managing Vercel projects. Triggers on Vercel, deploy, serverless, edge function, Next.js deployment.

Fetch and parse web pages using curl + python for HTML-to-text extraction.

# WordPress Add Links

Add "Open in molab" badge(s) linking to marimo notebooks. Works with READMEs, docs, websites, or any markdown/HTML target.

Export context report as Markdown or HTML

This skill should be used when the user asks about libraries, frameworks, API references, or needs code examples. Activates for setup questions, code generation involving libraries, or mentions of specific frameworks like React, Vue, Next.js, Prisma, Supabase, etc.

Fetch and summarize API documentation from official sources before implementation. Covers Rails, Tailwind, external libraries, and gem source exploration. Triggers on fetch docs, API reference, library documentation, check docs, read documentation.

Modern frontend patterns for React Server Components, performance optimization, and Core Web Vitals

Use when writing or modifying JavaScript, CSS, or commit messages in LiteJS projects — enforces non-standard conventions like no-semicolons, comma-first declarations, and same-level switch/case

Pattern for building MCP servers in Next.js with mcp-handler, shared Zod schemas, and reusable server actions.

Next.js 14+ App Router patterns including RSC, ISR, middleware, parallel routes, and data fetching

Execute end-to-end testing of React micro frontends using Playwright MCP to validate functionality, responsiveness, and user workflows

Use when the codebase spans multiple languages/runtimes — frontend (TS) + backend (Python) + infra (HCL) + scripts (Bash). Finds cross-language consistency issues — naming, types, API shape, error contracts.

Initialize and configure Astro/Airflow projects. Use when the user wants to create a new project, set up dependencies, configure connections/variables, or understand project structure. For running the local environment, see managing-astro-local-env.

Scaffold production-ready React Native apps using the @codewithbeto/ship CLI. Use when the user wants to create a new app from a Code with Beto template, scaffold a project with Platano, or run `bunx @codewithbeto/ship`. Always use flag-based (non-interactive) mode — the interactive TUI requires a terminal.

Sync React state to URL query params with nuqs (Suspense wrapper, parsers, clearing, deep-linkable dialogs). Use when building shareable filters, search, or URL-driven dialogs.

Visualize subagent task dependencies using ASCII diagrams before launching agents and create comprehensive HTML summaries after completion.

Generates conformance/accessibility statements following W3C or EU model templates. Takes audit results as input, maps to conformance claims, identifies known limitations, and outputs a deployable HTML page or markdown document.

Use this skill when editing documentation, working with files in Doc/, adding versionadded or versionchanged markers, creating NEWS entries for bug fixes or features, or building the HTML docs. Covers reStructuredText (.rst) format, documentation validation, and NEWS file requirements.

Knowledge about pyecharts chart creation, HTML report generation, and visualization best practices

Use when implementing Disney's 12 animation principles with Framer Motion in React applications

Adds internationalization (i18n) infrastructure with translation plumbing, scalable key strategy, formatters for dates/numbers/currency, plural rules, and language switching. Use when implementing "internationalization", "translations", "multi-language support", or "i18n".

This skill should be used when inspecting marimo notebook execution results. Triggers include: - Checking notebook output - Viewing execution results - Reading __marimo__ HTML snapshots - Debugging notebook errors - Verifying cell outputs

Analyze PatternFly modifier class (pf-m-*) usage across SCSS files and generate usage reports. Use when documenting modifier patterns, auditing CSS consistency, or planning refactors.

Deploying PolicyEngine frontend apps to Vercel - naming, scope, team settings

Use when implementing Disney's 12 animation principles with React Spring's physics-based animations

Rspack best practices for config, CLI workflow, type checking, CSS, bundle optimization, assets and profiling. Use when writing, reviewing, or troubleshooting Rspack projects.

Team code review conventions for ProVet Cloud frontend. Use when writing Vue components, composables, templates, or translations.

Use when writing ERB templates, partials, or view helpers - covers partial organization, optional locals, CSS class patterns, and collection rendering with caching

WCAG accessibility patterns — semantic HTML, ARIA, focus management, keyboard navigation. Use when working with aria attributes, role attributes, dialog/nav elements, form elements, or focus management code.

Full-featured AI chatbot with Next.js 15, Auth.js, Drizzle ORM, and multi-model support.

Use when implementing Disney's 12 animation principles with pure CSS animations and transitions

Analyze dependencies for upgrade planning and migration. Use when user asks "upgrade to X", "migrate from X to Y", "what breaks if we upgrade", "iOS 17 migration", "React 18 upgrade", or planning framework/SDK upgrades.

Helps troubleshoot common Expo and React Native issues. Use when the user encounters build errors, runtime issues, or needs help debugging their Expo app.

Configure file watching hooks to auto-react to config changes, env file updates, and dependency modifications. Use to set up reactive workflows.

Framework-agnostic CSS patterns for typography, color, motion, and spatial composition.

Set up Vite Module Federation for React microfrontends with proper shared dependencies and route exposure

Next.js expert for App Router, SSR/SSG, API routes, middleware, and deployment

Scaffolds PatternFly React projects with PF6-safe dependencies, imports, and starter layout. Use when creating a new PatternFly app or bootstrapping a migration sandbox.

React expert for hooks, state management, Server Components, and performance optimization

Add Agentation visual feedback toolbar to a Next.js project