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 human-avatar/skills-for-humanity --skill s4h-design-simplicitygit clone --depth 1 https://github.com/human-avatar/skills-for-humanityWrote 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/human-avatar/skills-for-humanity/s4h-design-simplicity)<a href="https://agentmods.dev/skills/human-avatar/skills-for-humanity/s4h-design-simplicity"><img src="https://agentmods.dev/badge/skills/human-avatar/skills-for-humanity/s4h-design-simplicity/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/human-avatar/skills-for-humanity/s4h-design-simplicity"><img src="https://agentmods.dev/badge/skills/human-avatar/skills-for-humanity/s4h-design-simplicity.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00084 | $0.01676 |
| Opus 5.5 | $0.00034 | $0.00670 |
| Sonnet 5.5 | $0.00017 | $0.00335 |
| Haiku 4.5 | $0.00008 | $0.00168 |
Grade A, and why
s4h-design-simplicity 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 1mo 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 — 129 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Design: Simplicity
The hardest design work is not adding — it is knowing what to remove. Every element that is added must justify its presence. Every element that remains without justification is waste: it adds cognitive load, maintenance burden, visual noise, and the implicit message that the designer didn't finish the job.
Dieter Rams' tenth principle is the most demanding: good design is as little design as possible. He doesn't mean sparse aesthetics. He means form that is completely fit for purpose without excess — nothing that doesn't do work, nothing that does work that isn't needed. Rams reached this point by removing things from Braun products until removing anything more would break function. The test is not "is this minimal?" but "is this necessary?"
Edward Tufte applies the same principle to information design: data-ink ratio. Of all the ink on the page, what fraction encodes actual data? Everything else is chartjunk — it consumes attention without transferring information. Remove it. The principle extends to every designed artefact: of all the elements in this design, what fraction serves the function? The rest can go.
The difficulty is that subtraction feels destructive. Features that were added with reasons seem like they should stay. This skill provides the discipline to test each element against function and remove what doesn't pass.
Your Process
Step 1: Enumerate Every Element List every element in the current design. Be exhaustive. For a product: features, controls, labels, states. For a document: sections, headings, callouts, annotations, formatting choices. For a UI: screens, interactions, fields, error states, modals, navigation items. For a system: components, interfaces, parameters, configurations.
If the list is long, group by layer or component before enumerating.
Framing check: Confirm the design and the purpose it should serve before continuing. State what you've identified — the thing being simplified and its primary function — in one sentence, then use AskUserQuestion:
- Question: "I'm reading this as: [your one-sentence framing of the design and its purpose]. Is that right?"
- Header: "Framing"
- Options:
- Yes — proceed — framing is correct
- Adjust — one element is off; user will correct it before you continue
- Reframe — different situation than read; incorporate the correction before proceeding
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.
- 1mo ago First seen · 129 lines · 84 tokens per session scan A 4e13246ceaab
s4h-design-simplicity is a skill published in the GitHub repository human-avatar/skills-for-humanity (236 stars, last pushed 3mo ago), licensed MIT. It adds 84 tokens to every session and 1,676 once invoked, about $0.0003 per session on Opus 5.5. 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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