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/shopify/rubydex/claude-mdgit clone --depth 1 https://github.com/Shopify/rubydexWrote 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.
[](https://agentmods.dev/instructions/shopify/rubydex/claude-md)<a href="https://agentmods.dev/instructions/shopify/rubydex/claude-md"><img src="https://agentmods.dev/badge/instructions/shopify/rubydex/claude-md.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00021 | $0.00021 |
| Opus 5 | $0.00010 | $0.00010 |
| Sonnet 5 | $0.00004 | $0.00004 |
| Haiku 4.5 | $0.00002 | $0.00002 |
Grade A, and why
rubydex 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 4d 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.
The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
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.
- 4d ago First seen · 4 lines · 21 tokens per session scan A 20d9e8145d06
rubydex CLAUDE.md is an instructions file published in the GitHub repository Shopify/rubydex (328 stars, last pushed today), with no licence file. It adds 21 tokens to every session, about $0.0001 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 2026-08-30.
Other instructions, from other repositories
hw-mcp CLAUDE.md
Instructions for Hertwill/hw-mcp, covering project, constraints, technology stack, executive recommendation and recommended stack.
VectorCart copilot-instructions.md
Copilot instructions for Rounit-1st/VectorCart, covering vectorcart shopping assistant — llm instructions, role, 1. understand the customer, 2. convert the request into search inputs and visual search query.
ruby_llm CLAUDE.md
Claude Code instructions for crmne/ruby_llm, a project described as: One delightful Ruby framework for every major AI provider. Build AI agents, chatbots, RAG apps, and multimodal workflows in beautiful, expressive code.
voicetree CLAUDE.md
Claude Code instructions for voicetreelab/voicetree: ⛔ This is a NORMAL, WRITABLE checkout of THIS machine's own branch $VTDEVBRANCH (machine-local, set in /.env — e.g. dev-mac / dev-remote; never a literal in-repo; safe default dev-new). Edit & commit directly here (worktrees optional: vt-worktree ). vt-sync to pull…
marketplace-mcp AGENTS.md
AGENTS.md instructions for YegorMy/marketplace-mcp, covering agent notes, rules and verification.
ai-dossier AGENTS.md
AGENTS.md instructions for imboard-ai/ai-dossier, covering agents.md, critical: never checkout branches in this directory, before debugging infrastructure, before planning an issue and project quick reference.