A design-document template for planning user interfaces, including screens, components, interactions, responsive layouts, and accessibility. Accessibility means making software usable with tools such as keyboards and screen readers.

It helps define component hierarchies, state and data flow, interaction paths, design-system use, responsive breakpoints, and keyboard or ARIA requirements.

It turns a frontend request into a clear specification before implementation, including normal, error, and edge-case behavior.

ui-designer — Skill for Claude Code by myrtlepn

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add myrtlepn/gran-maestro --skill ui-designer

Clone the repo

git clone --depth 1 https://github.com/myrtlepn/gran-maestro

Made for: Claude Code.

Or install mst, the plugin that ships this one along with the rest of its 42 skills, 4 hooks.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/myrtlepn/gran-maestro/ui-designer/github.svg)](https://agentmods.dev/skills/myrtlepn/gran-maestro/ui-designer)

Your own site

<a href="https://agentmods.dev/skills/myrtlepn/gran-maestro/ui-designer"><img src="https://agentmods.dev/badge/skills/myrtlepn/gran-maestro/ui-designer/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/myrtlepn/gran-maestro/ui-designer"><img src="https://agentmods.dev/badge/skills/myrtlepn/gran-maestro/ui-designer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 54 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 991 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00054	$0.00991
Opus 5	$0.00027	$0.00495
Sonnet 5	$0.00011	$0.00198
Haiku 4.5	$0.00005	$0.00099

Measured 9d ago against content hash ad9b97580c79, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

ui-designer scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/mst/skills/ui-designer/SKILL.md · 123 lines

How it starts

The opening of the file, as written. The whole thing — 123 lines — stays where its author put it; the contents beside it link to each section on GitHub.

mst:ui-designer

화면 설계, 컴포넌트 구조, 인터랙션 흐름, 디자인 시스템을 설계하는 Design Wing 템플릿 스킬입니다. PM Conductor가 변수를 치환하여 /mst:codex로 실행합니다.

실행 프로토콜

<ui_designer> You are the UI Designer in Gran Maestro's Design Wing. Your mission is to design user interfaces, component hierarchies, interaction flows, and design system adherence for frontend features. You produce UI specification documents — you NEVER write implementation code.

<success_criteria>

Component tree is clear with props/state flow
Interaction flow covers all user paths (happy, error, edge)
Design system tokens are referenced (colors, spacing, typography)
Responsive breakpoints are defined
Accessibility requirements are specified (ARIA, keyboard nav) </success_criteria>

Existing Components & Design Patterns

{EXISTING_COMPONENTS}

Architecture Context

{DESIGN_CONTEXT}

<output_format> Write the design document in the following format:

UI Specification - {REQ_ID}

Screen Overview

[Screen purpose and user goal]

Component Tree

Page
├── Header
│   ├── Logo
│   └── Navigation
├── MainContent
│   ├── ComponentA
│   │   ├── SubComponentA1 (props: ...)
│   │   └── SubComponentA2 (props: ...)
│   └── ComponentB
└── Footer

Component Specifications

{ComponentName}

Purpose: ...
Props: { prop1: type, prop2: type }
State: { state1: type }
Events: onClick, onChange, ...
Variants: default, loading, error, empty

Interaction Flow

User lands on page → [initial state]
User clicks {element} → [state change]
API response received → [update display]
Error occurs → [error state]

Responsive Behavior

Breakpoint	Layout	Changes
Desktop (≥1024px)	...	...
Tablet (768-1023px)	...	...
Mobile (<768px)	...	...

Read the full file on GitHub · 123 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

9d ago First seen · 123 lines · 54 tokens per session scan A ad9b97580c79

Subscribe to this mod's changes

ui-designer is a skill published in the GitHub repository myrtlepn/gran-maestro (24 stars, last pushed 21d ago), licensed MIT. It adds 54 tokens to every session and 991 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Design and UX

webgl-holographic-foil

A self-contained WebGL2 hero: thin-film interference over a crushed-foil surface whose palette shifts with the viewing angle; move the cursor to tilt the film.

nexu-io/open-design · 41 tokens

html-ppt-hermes-cyber-terminal

OpenDesign + BYOK: choosing and wiring your own model, hands-on — cost, quality, and the routing decision. Built as a decision-grade AI literacy deck for engineers, IT, applied-AI teams.

nexu-io/open-design · 53 tokens

html-ppt-taste-brutalist

16:9 HTML deck in tactical-telemetry / CRT-terminal taste. Deactivated-CRT charcoal slides, white-phosphor monospace, hazard-red accent, scanline overlay, ASCII syntax, density over decoration. Distilled from Leonxlnx/taste-skill brutalist-skill (Tactical Telemetry mode).

nexu-io/open-design · 78 tokens

ui-designer