MCP App StoreMCP App Store
from front-end-checklist72,891
Checks for and guides creation of a user-friendly custom 404 page that returns an actual 404 status and offers recovery paths (search, nav, popular links).
This skill explains why and how to create a custom 404 error page for websites. It validates that a site returns a real HTTP 404 for missing pages (avoiding soft-404s), and gives actionable guidance to add search, navigation, and helpful links to retain users who hit broken links.
Use when auditing site templates, server-rendered HTML, or routing behavior to ensure missing pages are handled correctly. Trigger when you find routes that return branded pages with 200 status, when a site lacks a search or clear navigation on error pages, or during a crawl that reports many 404 hits.
references/rule.md and the frontendchecklist rule page.Likely usable by developer-focused agent tooling (Copilot/Codex, Cursor, Claude Code) that can review repos and templates. The guidance is repository- and framework-agnostic.
This skill has not been reviewed by our automated audit pipeline yet.
JavaScript Minification
Checks that production JavaScript is minified and tree-shaken to reduce bundle size and improve page load performance.
Responsive Image Sizing
Checks image assets, markup, and build/CDN transforms to ensure images are served at appropriate display sizes using srcset and sizes to reduce wasted bandwidth
Single Descriptive H1
Checks and enforces a single, descriptive <h1> per page to improve topical clarity and on-page SEO.
Bounty Hunter — Atlas
Persona skill: 'Atlas' — a profit-focused developer persona for discovering, evaluating and executing paid bounties or freelance tasks with ROI-aware workflows.
Markdrop
Convert PDFs to structured Markdown or interactive HTML and generate AI-powered descriptions for images and tables using multiple LLM providers.
Scientific Schematics & Diagrams
Generate publication-quality scientific diagrams via AI with iterative quality review and smart regeneration for journal, conference, poster, and presentation o
FastAPI Project Templates
Creates production-ready FastAPI project scaffolds with async patterns, DI, middleware, and testing best practices for high-performance APIs.
Clerk Vue Patterns
Vue 3 integration patterns for Clerk: composables, router guards, and Pinia auth store integration.
Colorize (Strategic UI Color)
Introduce purposeful color into monochromatic or dull interfaces to improve hierarchy, meaning, and emotional warmth while preserving accessibility.
OpenTestAI
Automated, high-confidence AI testing: bug detection, persona feedback, and prioritized test-case generation using many specialized tester profiles.
Shopify Store Audit
Structured, page-by-page audit of Shopify storefronts to find conversion blockers and prioritized fixes for copy, UX, trust signals, and checkout friction.