Design

Builds APIs with Express including routing, middleware, error handling, and security. Use when creating Node.js APIs, building REST services, or adding middleware-based server functionality.

Create distinctive, memorable UI for landing pages, portfolios, marketing sites, and one-off creative work. Use when the user explicitly wants something "distinctive", "creative", "memorable", or "unique" - NOT for standard app components where consistency matters.

Write tests following 3-layer pyramid (unit 95%, integration 85%, E2E critical paths) with 1:1 file mapping for unit tests. Covers test organization, coverage requirements, fixtures, and best practices. Use when writing tests, checking coverage, or validating test structure.

Use before any creative work - creating features, building components, adding functionality, or modifying behavior. Explores user intent, requirements and design before implementation.

Build responsive layouts that adapt seamlessly across devices using mobile-first design, fluid layouts, and standard breakpoints. Use this skill when implementing responsive designs, creating mobile-first layouts, defining breakpoint styles, working with responsive components and pages, using relative units (rem, em) instead of fixed pixels, implementing media queries, ensuring touch-friendly tap targets, optimizing images and assets for different screen sizes, maintaining readable typography across breakpoints, prioritizing content for smaller screens, testing UI across mobile, tablet, and desktop devices, or building fluid container layouts. Apply this skill when building responsive UI components, optimizing layouts for different screen sizes, or reviewing mobile and tablet user experiences.

Create and use iOS simulator development builds with EAS for Expo/React Native apps. Use when setting up simulator-only profiles, building, installing, and running dev clients on iOS simulators.

Plan and implement CDN deployment of built WebF app assets (Vercel/Netlify/S3+CloudFront/GitHub Pages), including cache headers and verification. Use when the user mentions CDN, cache headers, S3/CloudFront, Vercel, Netlify, GitHub Pages, or deploying build output.

Diagnose Buildkite build failures by fetching build logs and analyzing errors.Use this skill when the user wants to:- Investigate why a build failed- Get logs from failed jobs- List recent builds for a pipeline- Check build status or annotationsTriggers: "why did the build fail", "check the CI", "buildkite logs", "failed build", "build is red", "what broke the build"

Use this skill when creating, editing, or publishing news articles or educational content. Contains templates, rules, checklists, script examples, and content guidelines.

Expert system for reviewing utility patent applications against USPTO MPEP guidelines.

Suite of tools for creating Practice Hub UI components and artifacts using the project's design system (React, Tailwind CSS, shadcn/ui, glass-card patterns). Use for building UI components that match Practice Hub's established design patterns and conventions.

Conduct structured implementation postmortems to gather feedback on architecture conformance, library friction, and tooling effectiveness. Use when reviewing completed implementations, PRs, or development phases to surface design gaps, boundary violations, and improvement opportunities. Triggers on requests for code review feedback, implementation retrospectives, architecture audits, or library/tooling evaluations.

Plan multi-week Twitter/X campaigns for newsletter growth, content launches, or audience building.Use when creating content calendars, planning thread series, coordinating cross-platform promotion,or designing engagement strategies. Includes posting cadence, "reply guy" tactics, and campaigntemplates optimized for the December 2025 algorithm.

Apply private modules with public re-exports pattern for clean API design. Includes conditional visibility for docs and tests. Use when creating modules, organizing mod.rs files, or before creating commits.

Translation and localization guidelines for KoboToolbox content in French, Spanish, and Arabic. Use when translating KoboToolbox materials including: (1) Academy courses and educational content, (2) User interface text and documentation, (3) Support articles, (4) Marketing materials, (5) Form building terminology, or (6) XLSForm technical terms. Covers tone, pronouns (tú/usted, tu/vous), gender-inclusive language, and official translations for brand terms and UI elements.

Use when user wants to implement a feature, build something new, add functionality, or create a component. Also use for creating new projects, repositories, templates, libraries, or any greenfield development. Triggers on "implement X", "build Y", "add feature Z", "create X", "design a new Y", "build a template for Z", "create a repo/project that does X", "start a new project". NOT for bug fixes (use systematic-debugging instead). Orchestrates the complete workflow from requirements gathering through research, design, planning, and parallel implementation with quality gates and review checkpoints at every phase.

Use when creating or editing reveal.js presentations, or when user mentions slides, presentations, reveal.js, code examples in slides, speaker notes, or slide design - enforces Tailwind CSS, proper code sizing, progressive reveal, semantic colors, and timing markers

Use when writing Nix code for flakes, modules, or packages

Build mithril-cache for torch.compile caching. Use when implementing content-addressable storage, cache keys, eviction, or framework hooks.

UI/UX iyileştirmelerini tasarlar, komponentleri refactor eder, animation ekler ve kullanıcı deneyimini geliştirmek için kod güncellemesi yapar.