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.
npx skills add Kevin-Liu-01/Agent-Machines --skill gstack-design-reviewgit clone --depth 1 https://github.com/Kevin-Liu-01/Agent-MachinesWrote 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.
[](https://agentmods.dev/skills/kevin-liu-01/agent-machines/gstack-design-review)<a href="https://agentmods.dev/skills/kevin-liu-01/agent-machines/gstack-design-review"><img src="https://agentmods.dev/badge/skills/kevin-liu-01/agent-machines/gstack-design-review/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.
<a href="https://agentmods.dev/skills/kevin-liu-01/agent-machines/gstack-design-review"><img src="https://agentmods.dev/badge/skills/kevin-liu-01/agent-machines/gstack-design-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00064 | $0.02203 |
| Opus 5 | $0.00032 | $0.01102 |
| Sonnet 5 | $0.00013 | $0.00441 |
| Haiku 4.5 | $0.00006 | $0.00220 |
Grade A, and why
gstack-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 8d 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.
This is a copy
89% identical to design-review — 12 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 192 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Design Review — Audit, Fix, Verify
UX principles from Steve Krug's "Don't Make Me Think."
Contract
This skill guarantees:
- Structured design audit with letter grades (A-F) across 10 categories
- AI Slop Score as standalone headline metric
- 6 usability tests on every page (Trunk Test, 3-Second Scan, Page Area Test, Happy Talk Detection, Mindless Choice Audit, Goodwill Reservoir)
- First-person narration mode (anti-slop: if you can't name the specific element, you're generating platitudes)
- Before/after screenshots for every fix
- One atomic commit per fix
- Findings sorted by impact (High > Medium > Polish)
UX Principles: How Users Actually Behave
The Three Laws of Usability
- Don't make me think. Every page should be self-evident. If a user stops to think "What do I click?" — the design has failed.
- Clicks don't matter, thinking does. Three mindless, unambiguous clicks beat one click that requires thought.
- Omit, then omit again. Get rid of half the words on each page, then get rid of half of what's left. Happy talk must die. Instructions must die.
How Users Actually Behave
- Users scan, they don't read. Design for scanning: visual hierarchy, clearly defined areas, headings and bullet lists, highlighted key terms. We're designing billboards at 60 mph.
- Users satisfice. They pick the first reasonable option, not the best. Make the right choice the most visible choice.
- Users muddle through. They don't figure out how things work. They wing it.
- Users don't read instructions. Guidance must be brief, timely, and unavoidable.
Billboard Design for Interfaces
- Use conventions. Logo top-left, nav top/left, search = magnifying glass. Don't innovate on navigation to be clever.
- Visual hierarchy is everything. More important = more prominent. If everything shouts, nothing is heard.
- Make clickable things obviously clickable. No relying on hover states for discoverability.
- Eliminate noise. Fix noise by removal, not addition.
- Clarity trumps consistency.
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.
- 8d ago First seen · 192 lines · 64 tokens per session scan A 86fa2aef3dae
gstack-design-review is a skill published in the GitHub repository Kevin-Liu-01/Agent-Machines (29 stars, last pushed today), licensed MIT. It adds 64 tokens to every session and 2,203 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 89% identical to design-review, differing in 12 lines, and is treated as a copy.
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