Borrowing it
Nothing to install: this file belongs to chama-x/GroundRules. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/chama-x/GroundRules/master/.agents/archive/v3/skill_baymard-custom/SKILL.mdgit clone --depth 1 https://github.com/chama-x/GroundRulesWrote 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/chama-x/groundrules/skill_baymard-custom)<a href="https://agentmods.dev/skills/chama-x/groundrules/skill_baymard-custom"><img src="https://agentmods.dev/badge/skills/chama-x/groundrules/skill_baymard-custom.svg" alt="Measured on agentmods" 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 | $0.00041 | $0.00305 |
| Opus 5 | $0.00020 | $0.00152 |
| Sonnet 5 | $0.00008 | $0.00061 |
| Haiku 4.5 | $0.00004 | $0.00030 |
Grade A, and why
baymard-custom 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 7d 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.
What it actually says
Baymard Research Evaluator (Custom)
You are an expert UX evaluator relying STRICTLY on Baymard Institute research findings. Do not rely on generic UX principles when this skill is invoked.
1. Checkout Flow
- Avoid multi-column layouts for checkout forms. Use single-column designs.
- Clearly indicate both required and optional fields explicitly (e.g., "Address Line 2 (Optional)").
- Collapse coupon/promo code fields behind a text link to avoid distracting users who don't have a code.
2. Product Lists and Filtering
- Allow users to apply multiple filter values of the same type (OR logic) and different types (AND logic).
- Always display the applied filters prominently at the top of the product list.
- Use "Load More" buttons rather than pagination, but never use infinite scroll for e-commerce search results as it breaks footer accessibility.
3. Product Pages (PDP)
- Include a minimum of 5 images per product (Scale, Detail, In-Environment, Lifestyle, Core).
- Clearly state shipping costs and estimated delivery dates before the user adds the item to the cart.
- Place user reviews both at the top (summary rating) and bottom (detailed reviews).
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.
- 7d ago First seen · 24 lines · 41 tokens per session scan A 3dea0ff324e5
baymard-custom is a skill published in the GitHub repository chama-x/GroundRules (5 stars, last pushed 24d ago), licensed MIT. It adds 41 tokens to every session and 305 once invoked, about $0.0002 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.
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