What platforms does APEX Frontend support?

APEX Frontend is a universal skill designed to support web, mobile, and desktop development across any major framework or stack.

What is meant by 'State Completeness' in this skill?

It is a core contract requiring that every UI implementation accounts for all possible states: loading, empty, error, partial data, success, offline, and permissions.

Can I use this skill if my platform doesn't support Agent Skills?

Yes, the repository provides standalone system and user prompt templates in the /prompts directory that can be used with any LLM interface.

How does this skill improve UI accessibility?

It includes a dedicated A11Y mode and reference playbooks that guide the model to implement ARIA roles, keyboard navigation, and screen-reader-friendly structures.

Does this skill help with debugging?

Absolutely. It features a specialized DEBUG mode and references designed specifically for identifying and fixing UI, state management, and layout bugs.

APEX Frontend Universal

Name: APEX Frontend Universal
Author: apexbusiness-systems

byapexbusiness-systems

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Design Tools

Accelerates the entire frontend lifecycle from UI/UX design and accessible implementation to performance optimization and cross-platform debugging.

APEX Frontend Universal serves as a comprehensive operating system for frontend engineering within Claude. It provides structured workflows for designing interfaces, auditing usability, building design systems, and troubleshooting complex state or layout bugs. Whether you are working on web, mobile, or desktop stacks, this skill ensures high-quality output by enforcing non-negotiables like state completeness—covering loading, error, and empty states—alongside rigorous accessibility standards and evidence-based performance improvements.

Key Features

01Multi-platform support for web, mobile, and desktop development stacks

021 GitHub stars

03Comprehensive UI/UX design and visual craft guidance for modern interfaces

04Performance optimization playbooks with evidence-based verification gates

05Deep debugging tools for resolving complex state, layout, and logic issues

06Standardized workflows for accessibility (A11Y) audits and compliance

Use Cases

01Implementing complex user flows with full state handling for loading, success, and error conditions

02Building and documenting a scalable design system with consistent patterns

03Auditing and refactoring existing codebases for accessibility and performance bottlenecks

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add apexbusiness-systems/apex-omnihub apex-frontend-universal-skill

For use in Claude.ai and ChatGPT

Download Skill