MCP server serving Apple Human Interface Guidelines as structured design tokens for AI coding agents — post-WWDC25 system colors, Liquid Glass constraints, SwiftUI mappings.
hig-mcp — Apple HIG design tokens for AI coding agents
An MCP server that gives Claude Code, Cursor, and any MCP client the Apple Human Interface Guidelines as structured data — real system color values, the type ramp, Liquid Glass constraints, and SwiftUI mappings — instead of prose to misread or stale hex to hallucinate.
The problem every Apple dev (and their agent) has right now
At WWDC25 Apple didn't just ship Liquid Glass — it quietly refreshed the system color palette (HIG changelog, June 9, 2025). systemBlue is not 007AFF anymore. It's 0088FF.
- Every LLM's training data is wrong. Ask an agent for iOS colors and it confidently hardcodes the pre-2025 palette. - The HIG is prose, not data. Apple publishes guidelines as web pages; an agent burns thousands of tokens fetching one, then still guesses the numbers. - Liquid Glass has rules nobody wrote down in one place — blur budgets, compositing layer caps, contrast measured after blur, the mandatory Reduce Transparency fallback. Agents violate all of them by default.
You end up reviewing generated SwiftUI that looks plausible and is subtly off-spec everywhere.
Curated, verified token files live inside the server — offline, deterministic, near-zero tokens — and prose is fetched live from sosumi.ai so guidance is never stale. Ask for color and you get the current post-WWDC25 spec table, not a 2023 memory.
Tool What it returns Network --------- higgettokens Design tokens by category: color, typography, materials, layout, swiftui, sfsymbols no higcheckliquidglass Liquid Glass guardrails + a concrete checklist for your
From the project README.
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