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 agentmods add instructions/mui/material-ui/claude-mdgit clone --depth 1 https://github.com/mui/material-uiWhat 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 | $0.00043 | $0.00043 |
| Opus 5 | $0.00022 | $0.00022 |
| Sonnet 5 | $0.00009 | $0.00009 |
| Haiku 4.5 | $0.00004 | $0.00004 |
Grade A, and why
material-ui 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 today.
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.
What it actually says
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
See AGENTS.md for codebase documentation.
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.
- today First seen · 6 lines · 43 tokens per session scan A 259d73f06a8e
material-ui CLAUDE.md is an instructions file published in the GitHub repository mui/material-ui (98,975 stars, last pushed today), licensed MIT. It adds 43 tokens to every session, about $0.0002 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.
Other instructions, from other repositories
chakra-ui CLAUDE.md
Instructions for chakra-ui/chakra-ui, covering claude's learning document - chakra ui, project overview, project structure, root directory and key packages.
ark CLAUDE.md
Instructions for chakra-ui/ark, covering ark ui - claude development guide, documentation structure, quick start, common commands and install dependencies.
www-sacred AGENTS.md
Instructions for internet-development/www-sacred, covering agents.md, what this repo is, repo map, conventions and the fonts menu previews.
styleseed AGENTS.md
Instructions for bitjaru/styleseed, covering styleseed repository guide, before changing the engine, generated files, verification and pull requests and releases.
wonder-blocks CLAUDE.md
Instructions for Khan/wonder-blocks, covering wonder blocks design system, technology stack, coding conventions, file & export naming and typescript.
wonder-blocks frontend-rules.instructions.md
Wonder Blocks design system conventions, component patterns, and coding standards.