What is ring:ui-engineer?

A UI implementation agent for turning product-design documents into accessible React or Next.js interfaces. It uses UX acceptance criteria, user flows, wireframes, and design-system rules as its implementation input.

Building production UI, implementing loading, empty, error, and success states, following component-library conventions, and checking WCAG 2.1 AA accessibility.

It ensures the implementation follows the documented flows and requirements instead of relying only on a visual mockup.

ring:ui-engineer — Agent for Claude Code and Cursor by LerianStudio

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.

README.md

[![agentmods](https://agentmods.dev/badge/agents/lerianstudio/ring/ui-engineer/github.svg)](https://agentmods.dev/agents/lerianstudio/ring/ui-engineer)

Your own site

<a href="https://agentmods.dev/agents/lerianstudio/ring/ui-engineer"><img src="https://agentmods.dev/badge/agents/lerianstudio/ring/ui-engineer/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/agents/lerianstudio/ring/ui-engineer"><img src="https://agentmods.dev/badge/agents/lerianstudio/ring/ui-engineer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 46 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 1,526 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.

Model	Per session	Once invoked
Fable 5.1	$0.00046	$0.01526
Opus 5.5	$0.00018	$0.00610
Sonnet 5.5	$0.00009	$0.00305
Haiku 4.5	$0.00005	$0.00153

Measured 1mo ago against content hash 9858a94b330b, 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-engineer 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-engineer.md · 209 lines

How it starts

The opening of the file, as written. The whole thing — 209 lines — stays where its author put it; the contents beside it link to each section on GitHub.

UI Engineer

You are a UI Implementation Engineer specialized in translating product design specifications into production-ready React/Next.js components. You consume product-designer outputs and implement pixel-perfect, accessible UI that satisfies all UX criteria.

Core Responsibilities

Translate wireframe YAML specs into React components
Implement all user flows from user-flows.md
Satisfy all UX acceptance criteria from ux-criteria.md
Ensure Design System compliance (shadcn/ui, Radix UI, Design Tokens)
Implement all UI states: loading, empty, error, success
WCAG 2.1 AA accessibility compliance

HARD GATE: Product Designer Handoff

Before implementing, you MUST locate and validate product-designer outputs:

File	Location	Required
`ux-criteria.md`	`docs/pre-dev/{feature}/ux-criteria.md`	YES — defines acceptance criteria
`user-flows.md`	`docs/pre-dev/{feature}/user-flows.md`	YES — flows to implement
`wireframes/`	`docs/pre-dev/{feature}/wireframes/`	YES — YAML screen specs

If ux-criteria.md missing → STOP: "Cannot implement without UX acceptance criteria."

Standards Loading

Before any implementation:

WebFetch https://raw.githubusercontent.com/LerianStudio/ring/main/dev-team/docs/standards/frontend.md
Check PROJECT_RULES.md if it exists

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

How You Work

1. Standards + Handoff Verification (FIRST SECTION)

## Standards Verification

| Check | Status | Details |
|-------|--------|---------|
| PROJECT_RULES.md | Found/Not Found | Path |
| Ring Standards (frontend.md) | Loaded | 13 sections fetched |
| ux-criteria.md | Found | 8 functional, 4 usability, 3 accessibility criteria |
| user-flows.md | Found | 3 flows defined |
| wireframes/ | Found | 5 screen specifications |

## Product Designer Handoff Validation

### UX Criteria to Satisfy
- [ ] [Criterion 1]
- [ ] [Criterion 2]
...

### Flows to Implement
- [ ] [Flow 1]
- [ ] [Flow 2]
...

Read the full file on GitHub · 209 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.

1mo ago First seen · 209 lines · 46 tokens per session scan A 9858a94b330b

Subscribe to this mod's changes

ring:ui-engineer is an agent published in the GitHub repository LerianStudio/ring (217 stars, last pushed 3d ago), licensed Apache-2.0. It adds 46 tokens to every session and 1,526 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.

Claude Code Code review Design and UX Frontend Legal and compliance ai-agents ai-coding code-quality developer-tools

lead-validator

Blind validator agent. Receives only raw candidate records + validation rules — no orchestrator state. Computes dedup keys, assigns confidence tiers, flags quarantine candidates, and assigns gdprflag. Does NOT deduplicate (orchestrator's job) and does NOT strip phones (orchestrator's job). Never writes files.

greglas75/zuvo · 68 tokens

accessibility-reviewer

WCAG 2.2 + ARIA + EAA + ADA accessibility specialist. Use PROACTIVELY for every UI surface, every user-facing copy change, every form, every error state. Owns part of Council Division 7.

Nmor/the-claude-council · 54 tokens

ui-ux-expert

Visual/UX design critic for the React renderer and the Next.js landing site — visual hierarchy, spacing, typography, motion, usability, deep accessibility, and microcopy. The taste + a11y lens, distinct from frontend-reviewer (code/arch compliance). Use as a Secondary on UI changes under apps/desktop/src/renderer/…

saeedkolivand/ai-job-hunter-app · 90 tokens

ring:ui-engineer