Why

LLMs are confidently wrong about design. They reach for defaults, invent outdated specs, and give generic "make it clean and modern" advice. SaglitzDesign replaces that with a curated, sourced, prescriptive knowledge base your agent can query on demand — the kind of guidance you'd get from a senior product designer, a conversion copywriter, and a technical SEO all at once.

Ask your agent to design a paywall, audit a landing page, or plan an iOS app, and it pulls concrete rules ("44pt minimum touch target", "one primary button per screen", "LCP ≤ 2.5s"), real patterns from top apps, and a phased roadmap — instead of guessing.

• Runtime‑independent. The server reads only local files. No external API, no account, nothing to configure. It just works, offline.
• Prescriptive, not vague. Every doc is written as rules an agent applies verbatim — numbers, thresholds, do/don't lists, anti‑patterns.
• Grounded. Design‑language specs from official sources; patterns studied from real top apps and sites; classics distilled from the actual books.

What's inside

72 knowledge documents across 11 categories:

Workflows (/ prompts) — "build me a…"

Beyond answering questions, SaglitzDesign ships prompts that orchestrate an entire build end‑to‑end. In Claude Code they appear in the / menu; invoke one and the agent runs the full method — roadmap → positioning & copy → real examples → writes the actual code → opens it in a browser, screenshots, scores it against the critique rubric, and iterates until it passes.

Just say, e.g., "/build_landing_page for a SaaS invoicing tool for freelancers" — the workflow asks for anything missing, then builds it.

The visual critique loop uses whatever browser tool is connected (Claude in Chrome, Playwright, or chrome‑devtools MCP) to see and refine its own output. Without one, it reviews the code directly.

Tools

Install

Requirements: Node.js 18+.

From npm (no clone needed):

npx saglitzdesign-mcp

From source:

git clone https://github.com/HalidSaglam/saglitzdesign-mcp.git
cd saglitzdesign-mcp
npm install
npm run build

Claude Code

Register it once (via npm — no clone), available in every project:

claude mcp add --scope user saglitzdesign -- npx -y saglitzdesign-mcp

Or, if you cloned the repo, point it at the built file:

claude mcp add --scope user saglitzdesign node /absolute/path/to/saglitzdesign-mcp/dist/index.js

Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "saglitzdesign": {
      "command": "npx",
      "args": ["-y", "saglitzdesign-mcp"]
    }
  }
}

Cursor / other MCP clients

Run npx -y saglitzdesign-mcp over stdio (or node /absolute/path/to/dist/index.js from a clone).

As skills (no MCP server)

Prefer lightweight, self-contained skills? Install the condensed SaglitzDesign skills into any skills-compatible agent:

npx skills@latest add HalidSaglam/saglitzdesign-mcp

Five skills — clean-interface-design, landing-page-conversion, design-review, motion-and-animation, apple-platform-design — each standalone guidance that also points to the full MCP for depth. See skills/.

Dev & debug

npm run dev       # run from TypeScript via tsx
npm run inspect   # open the MCP Inspector UI

Usage

Once connected, just talk to your agent naturally — it decides when to call the tools:

"Using saglitzdesign, plan the design of an iOS fitness app." → get_design_roadmap returns a 7‑phase plan with the docs to read at each step.

"Review my landing page for conversion with saglitzdesign." → design_review_checklist (landing‑page / conversion) + get_design_examples.

"How should a primary button behave on mobile?" → get_component_guidance returns specs, states, labels and anti‑patterns.

"Show me real paywall examples." → get_design_examples returns annotated screenshots.

"What's llms.txt and how do I set it up?" → seo_geo_guide (GEO) returns the tactic with a ready‑to‑use example.

Extending the knowledge base

Drop a Markdown file anywhere under knowledge/ with frontmatter:

---
id: my-topic
title: "My Topic"
category: ux            # design-language | component | ux | seo | geo | pattern | craft | book | process | marketing
platform: both          # mobile | web | macos | both
tags: [tag1, tag2]
sources: ["https://…"]
updated: 2026-07-08
---

Content served verbatim to clients…

The server indexes every .md on startup — no rebuild needed for content changes (just restart the server). A /refresh-knowledge command (.claude/commands/) can re‑research stale docs with agents.

How the knowledge was built

Design‑language and SEO/GEO docs were researched from official documentation and current sources (cited in each file's sources). Real‑world UI patterns were studied from top apps and websites; the visual example library was curated the same way. Classic design and marketing books were distilled into original, prescriptive syntheses — no source text is reproduced.

On images: screenshot files are a local research asset. They are not included in this repository or any published package. Without them, get_design_examples gracefully degrades to descriptions plus source links. To rebuild the local image library (or add your own examples), see scripts/regenerate-examples.md.

License

MIT © 2026 Saglitz Design.

The knowledge/ documents are original syntheses with sources cited per file. Referenced screenshots are not part of this repo and may not be redistributed — see NOTICE.md.