A guide for examining Stitch projects and writing a DESIGN.md file that describes their visual design system. Stitch is a tool for creating interface screens, and DESIGN.md serves as a reference for generating matching screens later.

Use it to document colors, visual descriptions, and design rules from Stitch screens for future design and prompting work.

It turns an existing project's visual choices into written guidance so future screens are more consistent with the established style.

design-md — Skill for Claude Code and Codex by beel-collab

Install

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.

Any agent

npx skills add beel-collab/presets.dev --skill design-md

Clone the repo

git clone --depth 1 https://github.com/beel-collab/presets.dev

Made for: Claude Code, Codex.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/beel-collab/presets.dev/design-md.svg)](https://agentmods.dev/skills/beel-collab/presets.dev/design-md)

Your own site

<a href="https://agentmods.dev/skills/beel-collab/presets.dev/design-md"><img src="https://agentmods.dev/badge/skills/beel-collab/presets.dev/design-md.svg" alt="Measured on agentmods" height="20"></a>

Per session 14 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,846 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin 89% copy Near-identical to another mod in the catalogue.

Token cost

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	$0.00014	$0.01846
Opus 5	$0.00007	$0.00923
Sonnet 5	$0.00003	$0.00369
Haiku 4.5	$0.00001	$0.00185

Measured 3d ago against content hash be5795227573, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

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 3d 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.

Origin

This is a copy

89% identical to design-md — 29 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

claude/skills/design/design-md/SKILL.md · 186 lines

How it starts

The opening of the file, as written. The whole thing — 186 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Stitch DESIGN.md Skill

You are an expert Design Systems Lead. Your goal is to analyze the provided technical assets and synthesize a "Semantic Design System" into a file named DESIGN.md.

When to Use This Skill

Use this skill when:

Analyzing Stitch projects
Creating DESIGN.md files
Synthesizing semantic design systems
Working with Stitch design language
Generating design documentation for Stitch projects

Overview

This skill helps you create DESIGN.md files that serve as the "source of truth" for prompting Stitch to generate new screens that align perfectly with existing design language. Stitch interprets design through "Visual Descriptions" supported by specific color values.

Prerequisites

Access to the Stitch MCP Server
A Stitch project with at least one designed screen
Access to the Stitch Effective Prompting Guide: https://stitch.withgoogle.com/docs/learn/prompting/

The Goal

The DESIGN.md file will serve as the "source of truth" for prompting Stitch to generate new screens that align perfectly with the existing design language. Stitch interprets design through "Visual Descriptions" supported by specific color values.

Retrieval and Networking

To analyze a Stitch project, you must retrieve screen metadata and design assets using the Stitch MCP Server tools:

Namespace discovery: Run list_tools to find the Stitch MCP prefix. Use this prefix (e.g., mcp_stitch:) for all subsequent calls.
Project lookup (if Project ID is not provided):
- Call [prefix]:list_projects with filter: "view=owned" to retrieve all user projects
- Identify the target project by title or URL pattern
- Extract the Project ID from the name field (e.g., projects/13534454087919359824)
Screen lookup (if Screen ID is not provided):
- Call [prefix]:list_screens with the projectId (just the numeric ID, not the full path)
- Review screen titles to identify the target screen (e.g., "Home", "Landing Page")
- Extract the Screen ID from the screen's name field

Read the full file on GitHub · 186 lines

Changes

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.

3d ago First seen · 186 lines · 14 tokens per session scan A be5795227573

Subscribe to this mod's changes

design-md is a skill published in the GitHub repository beel-collab/presets.dev (2 stars, last pushed 4mo ago), licensed MIT. It adds 14 tokens to every session and 1,846 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 89% identical to design-md, differing in 29 lines, and is treated as a copy.

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