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 castle-x/skills-x --skill minimal-ui-designgit clone --depth 1 https://github.com/castle-x/skills-xWrote 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/castle-x/skills-x/minimal-ui-design)<a href="https://agentmods.dev/skills/castle-x/skills-x/minimal-ui-design"><img src="https://agentmods.dev/badge/skills/castle-x/skills-x/minimal-ui-design/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/castle-x/skills-x/minimal-ui-design"><img src="https://agentmods.dev/badge/skills/castle-x/skills-x/minimal-ui-design.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 | $0.00055 | $0.00792 |
| Opus 5 | $0.00028 | $0.00396 |
| Sonnet 5 | $0.00011 | $0.00158 |
| Haiku 4.5 | $0.00006 | $0.00079 |
Grade A, and why
minimal-ui-design 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 12d 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.
How it starts
The opening of the file, as written. The whole thing — 87 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Minimal UI Design
Overview
Create UIs that feel calm and minimal without sacrificing clarity. Prioritize reduced copy, icon-led actions, and subtle guidance that keeps new users oriented.
When to Use
- The user asks for minimal, clean, or low-noise UI.
- You are removing redundant text or simplifying dense layouts.
- You are switching text buttons to icon-only controls.
- You need to keep a UI beginner-friendly after simplification.
- You are redesigning search dialogs, toolbars, or action bars.
Do NOT use when the goal is a marketing/brand-heavy or storytelling UI.
Core Principles
-
Reduce, don’t hide
- Remove duplicates and verbose labels first.
- Keep one minimal cue per area (placeholder, tooltip, or keycap row).
-
Icon-first, never icon-only without labels
- Use icons for primary actions.
- Always include
aria-label/titlefor meaning and onboarding. - Prefer icon-only + tooltip; use visible text only when confusion remains.
-
Guidance must be low-noise
- Use subtle keycap rows or tiny tooltips over large help panels.
- Keep hint text to 1–4 words.
-
Density with breathing
- Compact spacing, but avoid reducing font size to “fake minimal”.
- Use consistent spacing scale; keep touch targets ≥ 44×44.
-
Keep the editing flow keyboard-first
- Shortcut hints belong in a single, quiet strip.
- Show only shortcuts that are usable in the current surface.
- Avoid showing the same shortcut in multiple places.
Workflow (Minimal UI Pass)
- Delete redundancy
- Remove repeated labels, “empty state” descriptions, and duplicate headers.
- Collapse controls
- Merge similar actions into a single toggle or icon button.
- Replace text with icons
- Convert button text to icons, keep labels via
aria-label/title.
- Convert button text to icons, keep labels via
- Re-add minimal guidance
- Choose ONE: placeholder, tooltip, or keycap row.
- If you add a keycap row, remove other shortcut hints nearby.
- Check clarity
- Can a new user pass a 10-second scan test?
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 12d ago First seen · 87 lines · 55 tokens per session scan A eccbd197b1b9
minimal-ui-design is a skill published in the GitHub repository castle-x/skills-x (18 stars, last pushed 4mo ago), licensed MIT. It adds 55 tokens to every session and 792 once invoked, about $0.0003 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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