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 MuduiClaw/ClawKing --skill design-osgit clone --depth 1 https://github.com/MuduiClaw/ClawKingWrote 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/muduiclaw/clawking/design-os)<a href="https://agentmods.dev/skills/muduiclaw/clawking/design-os"><img src="https://agentmods.dev/badge/skills/muduiclaw/clawking/design-os/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/muduiclaw/clawking/design-os"><img src="https://agentmods.dev/badge/skills/muduiclaw/clawking/design-os.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 | $0.00060 | $0.01409 |
| Opus 5 | $0.00030 | $0.00705 |
| Sonnet 5 | $0.00012 | $0.00282 |
| Haiku 4.5 | $0.00006 | $0.00141 |
Grade A, and why
design-os 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 9d 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 — 124 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Design OS — Skill
Adapted from Design OS by Brian Casel. Structured product design planning: vision → design system → shell → sections → screen designs → export handoff.
The Planning Flow
Design OS follows a strict sequential workflow. Each step builds on the previous:
1. Product Vision → 2. Design Tokens → 3. App Shell
↓
6. Export ← 5. Screenshot ← 4. Sections (shape → data → screen)
| Step | Command | Trigger | Reference |
|---|---|---|---|
| 1 | Product Vision | "define product", "product vision" | references/product-vision.md |
| 1b | Product Roadmap | "update roadmap", "add sections" | references/product-roadmap.md |
| 1c | Data Shape | "update data shape", "define entities" | references/data-shape.md |
| 2 | Design Tokens | "choose colors", "design tokens", "typography" | references/design-tokens.md |
| 3 | Design Shell | "design shell", "app navigation", "layout" | references/design-shell.md |
| 4a | Shape Section | "shape section", "define section spec" | references/shape-section.md |
| 4b | Sample Data | "update sample data", "regenerate data" | references/sample-data.md |
| 4c | Design Screen | "design screen", "create UI components" | references/design-screen.md |
| 5 | Screenshot | "screenshot design", "capture screen" | references/screenshot-design.md |
| 6 | Export Product | "export product", "generate handoff" | references/export-product.md |
How It Works
- Read the relevant reference file for the step being invoked
- Also read
references/agents.mdfor overall Design OS directives and file structure - Follow the reference instructions step by step
- Read
references/screen-design-guide.mdwhen creating any screen designs (Step 4c)
Workspace Conventions
All files are stored relative to the target project root:
What ships with it
12 files 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.
- references/agents.md 8.1 KB
- references/data-shape.md 4.1 KB
- references/design-screen.md 11 KB
- references/design-shell.md 7.2 KB
- references/design-tokens.md 5.2 KB
- references/export-product.md 33 KB
- references/product-roadmap.md 3.1 KB
- references/product-vision.md 5.9 KB
- references/sample-data.md 9.0 KB
- references/screen-design-guide.md 4.2 KB
- references/screenshot-design.md 2.2 KB
- references/shape-section.md 7.2 KB
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.
- 9d ago First seen · 124 lines · 60 tokens per session scan A 55e82e3e4884
design-os is a skill published in the GitHub repository MuduiClaw/ClawKing (11 stars, last pushed 4mo ago), licensed MIT. It adds 60 tokens to every session and 1,409 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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