Claude Skills by LUC4N3X

Designs high-value regression, property, integration, fuzz, and risk-based mutation tests for behavior changes. Use after a root cause is known or a feature contract exists. Focuses on tests that can actually falsify the implementation, negative/error paths, red-green proof, boundary matrices, and avoiding mock-heavy tests that merely restate implementation details.

Project-aware TypeScript/JavaScript engineering for browser, Node.js, full-stack, libraries, and tooling. Use for TS/JS source, framework code, async behavior, typing, package/toolchain work, testing, performance, or TypeScript-specific refactoring.

Directs distinctive, product-specific UI/UX work and visual verification. Use for redesigns, new interfaces, layout, styling, motion, interaction, responsive behavior, accessibility, or when the user asks to make an interface more polished/professional. Avoids generic AI UI and requires rendered evidence when appearance is part of acceptance.

Performs evidence-first visual QA for images, generated assets, screenshots, branding, image edits, diagrams, and implemented web/mobile UI. Use after any visual deliverable or when comparing a result with a reference/baseline. Verifies pixels and metadata rather than trusting prompts, source code, or creator reports, with a light aesthetic polish check for professional visual work.

Designs and implements distinctive, production-grade websites, landing pages, dashboards, web apps, and frontend components. Use when the user asks to build, redesign, beautify, or substantially restyle a web interface. Infers the brief before styling, establishes a product-specific aesthetic direction/design system, uses image-to-code when visual references are central, and requires responsive browser evidence instead of generic AI-template output.