radix-mcp-server: Instructions file for Claude Code

CLAUDE.md

radix-mcp-server CLAUDE.md is an instructions file for Claude Code from gianpieropuleo/radix-mcp-server. It costs 1,889 tokens per session, scanned A, original, MIT.

An MCP server that gives AI assistants source code, setup instructions, and design tokens for Radix UI, a set of accessible web components and color tools.

In plain words
What is it for?
Use it when creating interfaces with Radix Themes, Radix Primitives, or Radix Colors, including finding component code and installation guidance.
Why use it?
It helps an assistant use Radix UI’s documented building blocks instead of guessing how the components, styles, or colors work.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md.

This is gianpieropuleo/radix-mcp-server's own configuration. It tells Claude Code how to work on radix-mcp-server itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything radix-mcp-server configures →

Reuse

Borrowing it

Nothing to install: this file belongs to gianpieropuleo/radix-mcp-server. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/gianpieropuleo/radix-mcp-server/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/gianpieropuleo/radix-mcp-server

Made for: Claude Code.

Wrote this? Show the measurements

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README.md
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Per session 1,889 This file is loaded in full into every session.
When invoked 1,889 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.01889 $0.01889
Opus 5 $0.00945 $0.00945
Sonnet 5 $0.00378 $0.00378
Haiku 4.5 $0.00189 $0.00189

Measured 9d ago against content hash 734693c70017, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

radix-mcp-server CLAUDE.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 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.

CLAUDE.md · 253 lines

How it starts

The opening of the file, as written. The whole thing — 253 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Radix UI MCP Server

A Model Context Protocol (MCP) server for Radix UI libraries, providing AI assistants with access to component source code, installation guides, and design tokens from the Radix ecosystem.

Overview

This MCP server provides comprehensive access to three major Radix UI libraries:

  • Radix Themes: Pre-styled, themeable components
  • Radix Primitives: Unstyled, accessible UI primitives
  • Radix Colors: Comprehensive color system with semantic scales

Commands

Development

npm run dev              # Build and start server
npm run build           # Build TypeScript to JavaScript
npm run clean           # Remove build directory

Testing

npm test                # Run test suite

CLI Usage

# Default (all libraries)
npx radix-mcp-server

# Specific library
npx radix-mcp-server --library themes
npx radix-mcp-server --library primitives
npx radix-mcp-server --library colors

# With GitHub API token
npx radix-mcp-server --github-api-key ghp_your_token_here

# Short flags
npx radix-mcp-server -l themes -g ghp_your_token_here

Architecture

Core Components

CLI Interface (src/index.ts)
  • Commander.js Integration: Professional CLI with structured command parsing
  • Library Selection: Support for themes|primitives|colors|all modes
  • GitHub API Configuration: Optional token for higher rate limits
  • Environment Variables: Support for RADIX_LIBRARY and GITHUB_PERSONAL_ACCESS_TOKEN
  • Modular CLI Structure: Commands and help text in src/cli/ directory
Core Architecture (src/core/)
  • Configuration Management (config.ts): Centralized library configurations and repository paths
  • Operations Factory (operations.ts): Unified operations pattern for all libraries
  • Registry Pattern (registry.ts): Cached operations with memoization
  • Dynamic Tool Generation: Configuration-driven tool creation from unified actions
GitHub API Integration (src/utils/http.ts)

Read the full file on GitHub · 253 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.

  1. 9d ago First seen · 253 lines · 1,889 tokens per session scan A 734693c70017

Subscribe to this mod's changes

radix-mcp-server CLAUDE.md is an instructions file published in the GitHub repository gianpieropuleo/radix-mcp-server (8 stars, last pushed 1y ago), licensed MIT. It adds 1,889 tokens to every session, about $0.0094 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 2026-08-31.

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