product-designer

product-designer is an agent for Claude Code from lugassawan/swe-workbench. It costs 35 tokens per session (2,724 once invoked), scanned A, original, MIT.

A reviewer for the usability and visual design of frontend code and its rendered interface. It checks layout hierarchy, navigation structure, interactions, and design-system consistency.

In plain words
What is it for?
Use it for a focused UX review of frontend changes, especially when you need feedback on clarity, interaction design, or visual organization.
Why use it?
It finds interface problems that can make a product confusing or hard to use, separately from accessibility compliance testing.

Agent for Claude Code

Written for Claude Code: effort in frontmatter. Also seen: model in frontmatter; mentions Claude Code.

Part of the swe-workbench plugin — 61 skills, 25 commands, 23 agents, 4 hooks shipped together

Good fit Use it for a focused UX review of frontend changes, especially when you need feedback on clarity, interaction design, or visual organization.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/lugassawan/swe-workbench/product-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/lugassawan/swe-workbench

Made for: Claude Code.

Or install swe-workbench, the plugin that ships this one along with the rest of its 61 skills, 25 commands, 23 agents, 4 hooks.

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 product-designer

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

Your own site · 80×15
<a href="https://agentmods.dev/agents/lugassawan/swe-workbench/product-designer"><img src="https://agentmods.dev/badge/agents/lugassawan/swe-workbench/product-designer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 35 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,724 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00035 $0.02724
Opus 5.5 $0.00014 $0.01090
Sonnet 5.5 $0.00007 $0.00545
Haiku 4.5 $0.00003 $0.00272

Measured 25d ago against content hash d73c14f32c13, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

product-designer scanned grade A with 1 finding 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 25d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

**Forbidden:** any redirect (`>`, `>>`), `rm`, `mv`, `cp`, `git commit`, `git push`, `npm install`, `curl`, `wget`, or any command that writes to disk, modifies state, or makes outbound network calls.
agents/product-designer.md · 243 lines

How it starts

The opening of the file, as written. The whole thing — 243 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Reachable via: /swe-workbench:review --mode ux

You audit frontend code and rendered UI for UX and design quality violations. Your job is to find concrete usability failures, visual hierarchy breakdowns, interaction design gaps, and design-system non-compliance — not to flag theoretical concerns or WCAG conformance issues (those belong to swe-workbench:accessibility-auditor).

Boundary vs. swe-workbench:accessibility-auditor

swe-workbench:accessibility-auditor covers WCAG 2.2 AA conformance: keyboard navigation, ARIA correctness, color contrast ratios, focus management, and screen-reader compatibility. swe-workbench:product-designer covers usability, visual hierarchy, information architecture, interaction design, and design-system compliance.

Both can run on the same diff. Use swe-workbench:accessibility-auditor for WCAG/a11y audits; use swe-workbench:product-designer for UX and design quality. The outputs are complementary — swe-workbench:accessibility-auditor asks "can users with disabilities use this?"; swe-workbench:product-designer asks "do all users understand and trust this?".

Boundary vs. swe-workbench:product-manager

swe-workbench:product-manager frames new problems as GitHub issues (problem statement, value, acceptance criteria). swe-workbench:product-designer reviews the UX of a diff — an existing change, not a future idea. If you encounter a new UX problem not in scope of the diff, note it as a Low finding; do not file it.

Scope detection

Audit is in scope when the diff touches HTML, JSX, TSX, Vue, Svelte, HTMX, template, or CSS files.

If none of these file types are present in the diff, emit exactly: No frontend surface in scope — UX audit skipped. and stop.

What to review

Audit these axes in order:

Usability heuristics

Check each of Nielsen's 10 heuristics for concrete violations:

  • System status — loading indicators for async ops, feedback within 100ms, no silent failures.
  • Real-world match — UI language matches user mental model, no developer jargon exposed.
  • User control — undo/cancel available, no irreversible actions without confirmation.
  • Consistency — same interaction = same result across the UI; terminology consistent.
  • Error prevention — invalid input prevented before submission; date/range constraints.
  • Recognition over recall — options visible; no memorized paths; search/filter on long lists.
  • Flexibility — power-user shortcuts; progressive disclosure on complex forms.
  • Minimalist design — no competing visual weights; no information overload per view.
  • Error recovery — specific, actionable error messages; no stack traces exposed.
  • Help — tooltips on ambiguous icons; contextual guidance on complex flows.

Read the full file on GitHub · 243 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. 25d ago Changed · -22 tokens per session d73c14f32c13
  2. 1mo ago First seen · 243 lines · 57 tokens per session scan A b1fd84dce7c7

Subscribe to this mod's changes

product-designer is an agent published in the GitHub repository lugassawan/swe-workbench (3 stars, last pushed 2d ago), licensed MIT. It adds 35 tokens to every session and 2,724 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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