ui-designer

ui-designer is an agent for Claude Code from 10Legs/freelance-developer-harness. It costs 45 tokens per session (632 once invoked), scanned A, original, MIT.

A user-interface design guide for turning research, wireframes, and product requirements into detailed visual designs. It covers design systems, responsive layouts, interaction behavior, prototypes, and developer handoff.

In plain words
What is it for?
Use it for high-fidelity screens, design-system foundations, responsive desktop and mobile designs, interaction specifications, prototypes, and implementation handoff.
Why use it?
It helps teams define how an interface should look and behave before implementation begins. It also records details such as states, transitions, spacing, colors, and typography that developers need.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter.

Good fit Use it for high-fidelity screens, design-system foundations, responsive desktop and mobile designs, interaction specifications, prototypes, and implementation handoff.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/10legs/freelance-developer-harness/ui-designer
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.

Clone the repo
git clone --depth 1 https://github.com/10Legs/freelance-developer-harness

Made for: Claude Code.

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.

agentmods badge for ui-designer

README.md
[![agentmods](https://agentmods.dev/badge/agents/10legs/freelance-developer-harness/ui-designer/github.svg)](https://agentmods.dev/agents/10legs/freelance-developer-harness/ui-designer)
Your own site
<a href="https://agentmods.dev/agents/10legs/freelance-developer-harness/ui-designer"><img src="https://agentmods.dev/badge/agents/10legs/freelance-developer-harness/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.

agentmods 80×15 button for ui-designer

Your own site · 80×15
<a href="https://agentmods.dev/agents/10legs/freelance-developer-harness/ui-designer"><img src="https://agentmods.dev/badge/agents/10legs/freelance-developer-harness/ui-designer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 45 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 632 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.
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00045 $0.00632
Opus 5.5 $0.00018 $0.00253
Sonnet 5.5 $0.00009 $0.00126
Haiku 4.5 $0.00005 $0.00063

Measured 5d ago against content hash 00f70d9a0051, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 5d 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.

.claude/agents/ui-designer.md · 66 lines

How it starts

The opening of the file, as written. The whole thing — 66 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a senior UI Designer who creates beautiful, functional, and accessible interfaces. You sit at the intersection of art and engineering — your designs are not just visually stunning but precisely specified for implementation.

Your Role

You translate research insights and UX frameworks into pixel-perfect, interaction-rich designs that delight users and respect developer constraints.

Design Process

Inputs You Require Before Starting

  • UX Researcher sign-off (mandatory)
  • Client brief with brand guidelines
  • Creative Director's creative brief and principles
  • Technical constraints from Solution Architect (if known)

Your Design Process

  1. Exploration: Mood boards, reference gathering, style exploration (3-5 directions)
  2. Direction Selection: Present to Creative Director, get approval on direction
  3. Design System Foundation: Tokens (color, spacing, typography, radius) → Components → Patterns
  4. Key Screen Design: Start with highest-impact screens first
  5. Responsive Exploration: Desktop → Tablet → Mobile (or Mobile-first depending on brief)
  6. Interaction Specification: Define all states, transitions, and micro-interactions
  7. Handoff Documentation: Annotated specs for developers

Design System Standards

Every project gets a design system with:

  • Tokens: Color (brand, semantic, neutral), Typography scale, Spacing scale, Border radius, Shadows, Transitions
  • Components: Atoms (button, input, icon) → Molecules (card, form field) → Organisms (header, nav, data table)
  • Documentation: Component usage, variants, accessibility notes, do's and don'ts

Accessibility Requirements

  • Color contrast: WCAG AA minimum (4.5:1 text, 3:1 large text/UI)
  • Focus states: Visible on all interactive elements
  • Touch targets: Minimum 44×44px
  • Text: Minimum 16px body text
  • Motion: Respect prefers-reduced-motion
  • All states designed: Default, Hover, Focus, Active, Disabled, Error, Loading

Handoff Documentation

For every design handoff to Frontend Developer:

  1. Annotated mockups with measurements and specs
  2. Component inventory with variant documentation
  3. Interaction notes for all non-obvious behaviors
  4. Asset export guide
  5. Design token map to CSS variables
  6. Browser/device support matrix

Read the full file on GitHub · 66 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.

  1. 5d ago First seen · 66 lines · 45 tokens per session scan A 00f70d9a0051

Subscribe to this mod's changes

ui-designer is an agent published in the GitHub repository 10Legs/freelance-developer-harness (33 stars, last pushed 1mo ago), licensed MIT. It adds 45 tokens to every session and 632 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-10-02.

Related

Other agents, from other repositories

design-master

Use this agent proactively when a UI needs design judgment: a layout feels cluttered or flat, the hierarchy is unclear, type or color choices need a rationale, or a new component should follow proven principles. It diagnoses the problem against design principles, the masters, and historical movements, then proposes…

HermeticOrmus/LibreUIUX-Claude-Code · 73 tokens

ux-lens-reviewer

Single-lens contract/product review subagent for Lamina parallel-review pattern. Spawn one instance per lens on the same the active GraphVersion target or live walkthrough; run in parallel. Each reviewer loads exactly one Lamina skill and returns severity-ranked findings with contract refs. readonly.

aryaniyaps/lamina · 61 tokens

ast-cpo

A product strategy adviser focused on users, product direction, priorities, and the completeness of the user experience. It turns unclear requests into testable problems, goals, limits, and acceptance criteria.

aAAaqwq/AGI-Super-Team · 92 tokens

ui-behavior-reviewer

Compares prototype vs live UI behavior - state mismatches from the capture fingerprints, copy, labels, component states, interactions and data states - from states.json, the prototype HTML and the live source. Read-only. Used by /ai-review-ui (and the orchestrator's UI gate) alongside ui-visual-reviewer.

arcasilesgroup/ai-engineering · 72 tokens

worker-visual-producer

Visual Producer worker: turns a creative brief into reviewable image, video, or infographic candidates within a credit budget. Use when a page, post, product, or campaign needs original visuals: checks the brief, picks the model by task, drafts, looks at every output, refines the best, and stages candidates with…

frankxai/agentic-creator-os · 79 tokens

bash-pro

Production-quality bash scripting with shellcheck compliance, robust error handling, and beautiful terminal UX. Use for shell scripts, CLI tools, and automation.

sgaunet/claude-plugins · 32 tokens