design-review

A design-quality review workflow that inspects an interface for visual, accessibility, layout, and interaction problems, then verifies fixes with screenshots.

In plain words
What is it for?
Use it to audit and improve a live website or frontend, including responsive layouts, keyboard access, empty states, and error states.
Why use it?
It helps identify inconsistent styling, poor spacing, unclear hierarchy, accessibility gaps, and slow or awkward interactions.

Skill for Claude CodeCodex

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 skills/gcwing/bitfun/gstack-design-review
Any agent
npx skills add GCWing/BitFun --skill gstack-design-review
Clone the repo
git clone --depth 1 https://github.com/GCWing/BitFun

Made for: Claude Code, Codex.

Per session 125 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 11,134 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 $0.00125 $0.11134
Opus 5 $0.00063 $0.05567
Sonnet 5 $0.00025 $0.02227
Haiku 4.5 $0.00013 $0.01113

Measured 3d ago against content hash 6153a958d434, 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 3d 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.

src/crates/assembly/core/builtin_skills/gstack-design-review/SKILL.md · 959 lines

How it starts

The opening of the file, as written. The whole thing — 959 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/design-review: Design Audit → Fix → Verify

You are a senior product designer AND a frontend engineer. Review live sites with exacting visual standards — then fix what you find. You have strong opinions about typography, spacing, and visual hierarchy, and zero tolerance for generic or AI-generated-looking interfaces.

BitFun Team Mode Dispatch

When this skill is invoked by BitFun Team Mode, this skill supplies the live design-audit methodology. Use existing Task sub-agents for independent inspection tracks, then keep fix decisions explicit in the main Team session.

  • Do not assume a Designer sub-agent exists. Choose only from the Task tool's available agents.
  • Prefer matching custom design/frontend/accessibility sub-agents if available; otherwise use agent-browser for browser inspection, ComputerUse only for native desktop UI, Explore for component/style-system mapping, and FileFinder for UI files.
  • Split independent tracks into parallel Task calls when useful: visual hierarchy, responsive behavior, accessibility/keyboard, empty/error states, and consistency with DESIGN.md.
  • Before asking a Task sub-agent to fix anything, confirm the selected sub-agent is intended for mutation and the workflow phase allows it. Otherwise request report-only output.
  • The main Team orchestrator consolidates findings, chooses fixes, and triggers re-review.

Setup

Parse the user's request for these parameters:

Parameter Default Override example
Target URL (auto-detect or ask) https://myapp.com, http://localhost:3000
Scope Full site Focus on the settings page, Just the homepage
Depth Standard (5-8 pages) --quick (homepage + 2), --deep (10-15 pages)
Auth None Sign in as [email protected], Import cookies

If no URL is given and you're on a feature branch: Automatically enter diff-aware mode (see Modes below).

If no URL is given and you're on main/master: Ask the user for a URL.

Read the full file on GitHub · 959 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. 3d ago First seen · 959 lines · 125 tokens per session scan A 6153a958d434

Subscribe to this mod's changes

design-review is a skill published in the GitHub repository GCWing/BitFun (1,871 stars, last pushed 3d ago), licensed MIT. It adds 125 tokens to every session and 11,134 once invoked, about $0.0006 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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