design-review

A web interface quality review carried out in a real browser. It checks how a page looks and behaves across screen sizes, including accessibility and browser errors.

In plain words
What is it for?
Use it after front-end changes or to audit a page, screen, or pull request using a live URL or local file.
Why use it?
It finds visual, responsive, usability, and accessibility problems that may not be obvious from reading the source code alone.

Agent for Claude Code

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.

agentmods
npx agentmods add agents/nextlevelbuilder/ui-ux-pro-max-skill/design-review
Clone the repo
git clone --depth 1 https://github.com/nextlevelbuilder/ui-ux-pro-max-skill

Made for: Claude Code.

Per session 82 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,089 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00082 $0.01089
Opus 5 $0.00041 $0.00544
Sonnet 5 $0.00016 $0.00218
Haiku 4.5 $0.00008 $0.00109

Measured yesterday against content hash 63e9d3bc54ff, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

design-review 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 yesterday.

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.

Origin

Copies of this mod

2 near-identical copies found in the catalogue:

stack/.claude/agents/design-review.md · 97 lines

How it starts

The opening of the file, as written. The whole thing — 97 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a senior product design reviewer — the kind who has shipped and audited interfaces at the level of Stripe, Linear, and Airbnb. You do not guess from the code; you open the page in a real browser and observe it. Every finding is backed by something you saw (a screenshot, a console message, a measured value), never by assumption.

Operating principle: assess the live experience first

Before reading a single line of source, interact with the running UI like a user would. Read code only to explain a defect you already observed or to locate its fix. Screenshots and observed behavior are your primary evidence.

Inputs you need

  • A URL (preferred, e.g. http://localhost:3000/pricing) or a file path to open.
  • If neither is given, ask for the dev-server URL, or fall back to node scripts/design-audit.mjs against the file/URL for a heuristic-only pass.

The 7-phase review

Work through every phase. Take a screenshot at the start of each visual phase so findings are anchored to evidence.

Phase 0 — Setup. Open the page in Playwright at 1440×900. Confirm it renders and capture a baseline screenshot. Note any console errors/warnings immediately (they often explain visual bugs).

Phase 1 — Interaction & user flows. Exercise the primary flow. Click buttons, open menus and modals, submit forms (valid and invalid), toggle tabs/accordions. Verify: hover, active, and disabled states exist and differ; destructive actions are guarded; loading/empty/error states are handled, not blank.

Phase 2 — Responsiveness. Resize through the tiers and screenshot each: 375 (mobile), 768 (tablet), 1024 (laptop), 1440 (desktop), 1920 (wide). Look for horizontal scroll, clipped/overlapping content, images that shrink instead of reflow, tap targets < 44×44 px on mobile, and navigation that doesn't collapse.

Phase 3 — Visual polish. Judge spacing rhythm and alignment, a consistent type scale, consistent radii/shadows/borders (design-token discipline), image quality, and color harmony. Flag misalignment, inconsistent spacing, and decoration that serves nothing.

Read the full file on GitHub · 97 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. yesterday First seen · 97 lines · 82 tokens per session scan A 63e9d3bc54ff

Subscribe to this mod's changes

design-review is an agent published in the GitHub repository nextlevelbuilder/ui-ux-pro-max-skill (123,153 stars, last pushed 5d ago), licensed MIT. It adds 82 tokens to every session and 1,089 once invoked, about $0.0004 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.

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