Builds production-quality UIs. Use when building or modifying user-facing interfaces. Use when creating components, implementing layouts, managing state, or when the output needs to look and feel production-quality rather than AI-generated.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Frontend UI Engineering
## Overview
Build production-quality user interfaces that are accessible, performant, and visually polished. The goal is UI that looks like it was built by a design-aware engineer at a top company — not like it was generated by an AI. This means real design system adherence, proper accessibility, thoughtful interaction patterns, and no generic "AI aesthetic."
## When to Use
- Building new UI components or pages
- Modifying existing user-facing interfaces
- Implementing responsive layouts
- Adding interactivity or state management
- Fixing visual or UX issues
## Component Architecture
### File Structure
Colocate everything related to a component:
```
src/components/
TaskList/
TaskList.tsx # Component implementation
TaskList.test.tsx # Tests
TaskList.stories.tsx # Storybook stories (if using)
use-task-list.ts # Custom hook (if complex state)
types.ts # Component-specific types (if needed)
```
### Component Patterns
**Prefer composition over configuration:**
```tsx
// Good: Composable
<Card>
<CardHeader>
<CardTitle>Tasks</CardTitle>
</CardHeader>
<CardBody>
…
The line at the top of this page pins the label git:20260627.bd6e9ea, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
GET https://markdownregistry.com/api/v1/artifacts/art_bigcyqeaqeggfc2m
GET https://markdownregistry.com/api/v1/resolve?ref=hamza-ali-shahjahan/hamzaish/frontend-ui-engineering
GET https://markdownregistry.com/api/v1/blob/b8493cadd02090826d16973ab5134585503f6f9b7e6e787ddf68de9a5ccdb4a1
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
hamza-ali-shahjahan/hamzaish · _archive/v0/agents/_orchestrator/SKILL.md · Top-level routing brain. Given any user request, identifies the product + stage + intent, then routes to the right…
hamza-ali-shahjahan/hamzaish · _archive/v0/agents/idea/competitor-mapper/SKILL.md · Map the competitive landscape by tier (direct/indirect/acquirer/adjacent) and argue why each could win. Antidote to…
hamza-ali-shahjahan/hamzaish · _archive/v0/agents/idea/devils-advocate/SKILL.md · Stress-test an idea or hypothesis. Build the strongest possible case AGAINST it, find disconfirming evidence, and…
hamza-ali-shahjahan/hamzaish · _archive/v0/agents/idea/idea-generator/SKILL.md · Generate startup ideas grounded in Hamza's existing patterns, current trends, and validated demand signals. Never just…
hamza-ali-shahjahan/hamzaish · _archive/v0/agents/idea/interview-synthesizer/SKILL.md · Synthesize a batch of customer interviews into evidence-for + evidence-against the hypothesis, with pattern surfacing…
hamza-ali-shahjahan/hamzaish · _archive/v0/agents/idea/problem-sharpener/SKILL.md · Turn vague problem observations into testable hypothesis statements with specific who/when/severity/current-workaround…
addyosmani/agent-skills · skills/frontend-ui-engineering/SKILL.md · Builds production-quality, accessible, responsive user-facing UIs. Use when building or modifying interfaces and pages…
shashankswe2020-ux/whoop-mcp · .github/skills/frontend-ui-engineering/SKILL.md · Builds production-quality UIs. Use when building or modifying user-facing interfaces. Use when creating components…
nota-america/forgecat-agent-profiles · profiles/addyosmani/agent-skills/for-forgecat/skills/frontend-ui-engineering/SKILL.md · Builds production-quality, accessible, responsive user-facing UIs. Use when building or modifying interfaces and pages…
nota-america/forgecat-agent-profiles · profiles/addyosmani/agent-skills/for-codex/.agents/skills/frontend-ui-engineering/SKILL.md · Builds production-quality, accessible, responsive user-facing UIs. Use when building or modifying interfaces and pages…
nota-america/forgecat-agent-profiles · profiles/addyosmani/agent-skills/for-cursor/.cursor/skills/frontend-ui-engineering/SKILL.md · Builds production-quality, accessible, responsive user-facing UIs. Use when building or modifying interfaces and pages…
nota-america/forgecat-agent-profiles · profiles/addyosmani/agent-skills/for-forgecat/platforms/cursor/.cursor/skills/frontend-ui-engineering/SKILL.md · Builds production-quality, accessible, responsive user-facing UIs. Use when building or modifying interfaces and pages…
nota-america/forgecat-agent-profiles · profiles/addyosmani/agent-skills/for-forgecat/platforms/codex/.agents/skills/frontend-ui-engineering/SKILL.md · Builds production-quality, accessible, responsive user-facing UIs. Use when building or modifying interfaces and pages…