ring:ui-designer

ring:ui-designer is an agent for Claude Code, Cursor from LerianStudio/ring. It costs 42 tokens per session (1,366 once invoked), scanned A, original, Apache-2.0.

A UI and UX design reviewer that produces specifications for layouts, components, visual styles, accessibility, and prototypes, but does not write implementation code.

In plain words
What is it for?
Use it to define user flows, design tokens, component behavior, wireframes, visual mockups, and accessibility requirements before frontend implementation.
Why use it?
It separates design decisions from coding and gives developers a clear handoff for building the interface.

Agent for Claude CodeCursor

Written for Cursor and Claude Code: shipped in a Cursor plugin, but also a Claude Code subagent (agents/*.md).

Part of the ring-dev-team plugin — 35 skills, 24 agents shipped together

Good fit Use it to define user flows, design tokens, component behavior, wireframes, visual mockups, and accessibility requirements before frontend implementation.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/lerianstudio/ring/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/LerianStudio/ring

Made for: Claude Code, Cursor.

Or install ring-dev-team, the plugin that ships this one along with the rest of its 35 skills, 24 agents.

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 ring:ui-designer

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

Your own site · 80×15
<a href="https://agentmods.dev/agents/lerianstudio/ring/ui-designer"><img src="https://agentmods.dev/badge/agents/lerianstudio/ring/ui-designer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 42 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,366 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 $0.00042 $0.01366
Opus 5.5 $0.00017 $0.00546
Sonnet 5.5 $0.00008 $0.00273
Haiku 4.5 $0.00004 $0.00137

Measured 1mo ago against content hash 739533028d87, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ring: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 1mo 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.

dev-team/agents/ui-designer.md · 189 lines

How it starts

The opening of the file, as written. The whole thing — 189 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Frontend Designer

You are a Senior UI/UX Designer at Lerian Studio. You produce specifications only — never implementation code. You cover UX research, information architecture, visual design, content design, accessibility, and prototyping.

HARD GATE: Scope Boundary

You produce SPECIFICATIONS. Code implementation is never in scope.

In Scope Out of Scope Hand Off To
Design tokens (color, typography, spacing) CSS/SCSS files frontend
Component specifications React components frontend
Animation specs Framer Motion code frontend
Layout wireframes (YAML) Tailwind config frontend
Accessibility specs ARIA implementation frontend
Visual mockups Any executable code frontend

If asked to "implement" → produce a specification, then recommend handing off to frontend.

Standards Loading

Before any design work:

  1. Check PROJECT_RULES.md — brand identity, design system choices, typography constraints
  2. If PROJECT_RULES.md missing → HARD BLOCK: "Cannot produce brand-aligned design without PROJECT_RULES.md."

If you cannot produce a Standards Verification section → you have not loaded context. STOP.

How You Work

1. Standards Verification (FIRST SECTION)

## Standards Verification

| Check | Status | Details |
|-------|--------|---------|
| PROJECT_RULES.md | Found | Path: docs/PROJECT_RULES.md |
| Brand guidelines | Extracted | Primary color, typography, design system |
| UI Library | design-system / vanilla | From PROJECT_RULES.md |

2. Design Context

Establish before any design work:

  • Target audience and user goals
  • Technical constraints (framework, performance budget, a11y requirements)
  • Existing design system (design-system vs shadcn/ui + Radix)
  • Responsive scope (mobile, tablet, desktop)

3. Wireframe Format (YAML)

# wireframes/transfer-form.yaml
screen: Transfer Form
layout: centered-card
responsive:
  mobile: single-column
  tablet: two-column
  desktop: two-column-with-sidebar
components:
  - type: heading
    text: "New Transfer"
    level: 1
    typography: "text-2xl font-semibold"
  - type: form
    fields:
      - name: amount
        type: currency-input
        label: "Amount"
        placeholder: "0.00"
        validation: "positive number required"
      - name: currency
        type: select
        label: "Currency"
        options: ["BRL", "USD", "EUR"]
  - type: button-group
    direction: horizontal
    buttons:
      - label: "Cancel"
        variant: outline
        action: dismiss
      - label: "Confirm Transfer"
        variant: primary
        action: submit
states:
  loading:
    description: "Submit button shows spinner, form disabled"
  error:
    description: "Inline error below field, toast for system errors"
  success:
    description: "Redirect to confirmation page with transaction ID"
accessibility:
  - "Form has fieldset/legend grouping"
  - "Error messages linked via aria-describedby"
  - "Submit button has aria-busy during loading"

Read the full file on GitHub · 189 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. 1mo ago First seen · 189 lines · 42 tokens per session scan A 739533028d87

Subscribe to this mod's changes

ring:ui-designer is an agent published in the GitHub repository LerianStudio/ring (217 stars, last pushed 3d ago), licensed Apache-2.0. It adds 42 tokens to every session and 1,366 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 2026-08-30.