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 gabelul/stitch-kit --skill stitch-design-mdgit clone --depth 1 https://github.com/gabelul/stitch-kitWrote 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/gabelul/stitch-kit/stitch-design-md)<a href="https://agentmods.dev/skills/gabelul/stitch-kit/stitch-design-md"><img src="https://agentmods.dev/badge/skills/gabelul/stitch-kit/stitch-design-md.svg" alt="Measured on agentmods" 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 | $0.00053 | $0.02285 |
| Opus 5 | $0.00026 | $0.01143 |
| Sonnet 5 | $0.00011 | $0.00457 |
| Haiku 4.5 | $0.00005 | $0.00229 |
Grade A, and why
stitch-design-md 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.
How it starts
The opening of the file, as written. The whole thing — 230 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Stitch → DESIGN.md
Constraint: Only use this skill when the user explicitly mentions "Stitch" or when preparing design system documentation for Stitch generation.
You are an expert Design Systems Lead. Your job is to analyze Stitch project assets and synthesize a Semantic Design System into a file named DESIGN.md — written in natural language, not CSS.
When to use this vs. stitch-design-system
| Skill | What it produces | Use it for |
|---|---|---|
stitch-design-md |
Natural-language DESIGN.md |
Feeding back into Stitch prompts; multi-page visual consistency; design docs |
stitch-design-system |
design-tokens.css, tailwind-theme.css, DESIGN.md |
Code-level theming for Next.js, Svelte, React, HTML output |
Use stitch-design-md first if you're building more Stitch screens. Use stitch-design-system when you're converting to code.
Prerequisites
- Stitch MCP Server configured
- A Stitch project with at least one designed screen
Step 1: Retrieve the design
If the user provides a Stitch URL
If the user pastes a Stitch design URL like https://stitch.withgoogle.com/projects/3492931393329678076?node-id=375b1aadc9cb45209bee8ad4f69af450:
- Parse the URL:
projectId= segment after/projects/and before?(e.g.3492931393329678076)screenId= query paramnode-id(e.g.375b1aadc9cb45209bee8ad4f69af450)
- Call
[prefix]:get_screenwith those IDs - Skip ahead to Step 2
If project/screen IDs are unknown
- Run
list_tools→ find the Stitch MCP prefix - Call
[prefix]:list_projectswithfilter: "view=owned"→ select project by title → extract numeric ID - Call
[prefix]:list_screenswithprojects/[projectId]→ pick the representative screen - Call
[prefix]:get_screenwith numericprojectIdandscreenId - Call
[prefix]:get_projectwithprojects/[projectId]→ get fulldesignThemeincluding:- Core:
colorMode,customColor,colorVariant,roundness,spacingScale - Fonts:
headlineFont,bodyFont,labelFont - Colors:
namedColors(40+ semantic tokens), override colors - Documentation:
designMd(auto-generated design system — if present, use as foundation for DESIGN.md) - Backgrounds:
backgroundLight,backgroundDark
- Core:
What ships with it
3 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.
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 · 230 lines · 53 tokens per session scan A 2a764975dd42
stitch-design-md is a skill published in the GitHub repository gabelul/stitch-kit (43 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 53 tokens to every session and 2,285 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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