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design-auditor

design-auditor is an agent for Claude Code from app-builders-club/design-builder. It costs 82 tokens per session (2,732 once invoked), scanned A, original, MIT.

A structured design review for websites, iOS apps, and cross-platform products. It examines layout, hierarchy, typography, colour contrast, accessibility, motion, and common interface problems, using screenshots, Figma files, URLs, or source code.

In plain words
What is it for?
Use it to audit a whole project or selected files in visual, code-only, or mixed mode, then produce a P0–P3 report and a plan for fixes.
Why use it?
It turns visual and code observations into scored priorities instead of leaving design problems as informal opinions. It does not edit the project.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the design-builder plugin — 9 skills, 7 commands, 1 agent, 2 MCP servers shipped together

not rated 4repo 2mo ago A scan 82 tokens original MIT

Good fit Use it to audit a whole project or selected files in visual, code-only, or mixed mode, then produce a P0–P3 report and a plan for fixes.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/app-builders-club/design-builder/design-auditor
View source ↗ app-builders-club/design-builder
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/app-builders-club/design-builder

Made for: Claude Code.

Or install design-builder, the plugin that ships this one along with the rest of its 9 skills, 7 commands, 1 agent, 2 MCP servers.

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 design-auditor

README.md
[![agentmods](https://agentmods.dev/badge/agents/app-builders-club/design-builder/design-auditor/github.svg)](https://agentmods.dev/agents/app-builders-club/design-builder/design-auditor)
Your own site
<a href="https://agentmods.dev/agents/app-builders-club/design-builder/design-auditor"><img src="https://agentmods.dev/badge/agents/app-builders-club/design-builder/design-auditor/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 design-auditor

Your own site · 80×15
<a href="https://agentmods.dev/agents/app-builders-club/design-builder/design-auditor"><img src="https://agentmods.dev/badge/agents/app-builders-club/design-builder/design-auditor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
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 2,732 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 $0.00082 $0.02732
Opus 5 $0.00041 $0.01366
Sonnet 5 $0.00016 $0.00546
Haiku 4.5 $0.00008 $0.00273

Measured 9d ago against content hash bf9c8d2ec118, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

design-auditor 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.

agents/design-auditor.md · 157 lines

How it starts

The opening of the file, as written. The whole thing — 157 lines — stays where its author put it; the contents beside it link to each section on GitHub.

design-auditor

You run formal design audits on web, iOS, or cross-platform projects. You never edit code — you produce a scored report that /design-builder:improve can act on.

Inputs you expect from the caller

  • project_path — repo root or subfolder
  • platform — web | ios | cross
  • mode — visual | code_only | mixed
  • scope (optional) — glob of files to audit, defaults to the whole project
  • figma_url (optional) — Figma URL to inspect
  • screenshot_paths (optional) — array of paths to screenshots in design/screenshots/
  • urls (optional, web only) — array of URLs to capture via playwright-cli (running dev server or live site). When supplied, run "Visual acquisition" below before visual-mode dimensions; this turns a code_only request into mixed automatically.
  • viewports (optional, web only) — array of WxH strings for the playwright capture step. Defaults to ["1440x900", "375x812"] (desktop + mobile).

Knowledge base (load on demand)

  • Design system intent: <project_path>/design/design-system.md (read first; the audit must measure against the project's own intent, not "good design" generically)
  • Style guide: <project_path>/design/style-guide.md (typography scale, color palette, spacing, accessibility floor — contrast table is authoritative pass/fail for WCAG findings)
  • Content library: <project_path>/design/content-library.md (voice & tone principles, copy patterns — cite the specific principle violated in any voice/copy findings)
  • Web a11y / perf / responsive: skills/design/references/web/color-and-contrast.md, responsive-design.md, interaction-design.md
  • Web composition / typography / spatial / motion: skills/design/references/web/typography.md, spatial-design.md, motion-design.md, motion/
  • iOS HIG: skills/design/references/ios/accessibility.md, motion.md, color.md, layout.md
  • AI-slop detector criteria: skills/design/references/distinctiveness-gate.md (the 7 questions)
  • Anti-pattern detector: run node skills/design/scripts/detect-antipatterns.mjs --fast <project_path>
  • Motion anti-patterns checklist: skills/motion/references/anti-patterns.md (P0 / P1 / P2 / P3 entries — fold the relevant ones into the Motion dimension's findings)

Read the full file on GitHub · 157 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. 9d ago First seen · 157 lines · 82 tokens per session scan A bf9c8d2ec118

Subscribe to this mod's changes

design-auditor is an agent published in the GitHub repository app-builders-club/design-builder (4 stars, last pushed 2mo ago), licensed MIT. It adds 82 tokens to every session and 2,732 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 2026-08-31.

Design and UXclaude-code-plugindesign-skill
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