atom CLAUDE.md

A pointer file telling Claude and other AI tools to read the repository's AGENTS.md file for project instructions. It is duplicated under several common instruction-file names so different coding tools find the same guidance.

In plain words
What is it for?
Use it at the start of an AI-assisted coding session to locate and follow the project's main agent instructions.
Why use it?
It keeps one shared instruction source instead of repeating rules in multiple files that could become inconsistent.

Instructions file

Install

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.

agentmods
npx agentmods add instructions/machbuilds/atom/claude-md
Clone the repo
git clone --depth 1 https://github.com/machbuilds/atom
Per session 97 This file is loaded in full into every session.
When invoked 97 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
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 $0.00097 $0.00097
Opus 5 $0.00048 $0.00048
Sonnet 5 $0.00019 $0.00019
Haiku 4.5 $0.00010 $0.00010

Measured 2d ago against content hash c92ddc1e3504, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

atom 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 2d 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 · 11 lines

What it actually says

CLAUDE.md → AGENTS.md

Project instructions live in AGENTS.md. Read that file.

This forwarder exists so Claude Code's default CLAUDE.md auto-load works without duplicating content. Same pattern for GEMINI.md, .cursorrules, and .github/copilot-instructions.md.

If you are an AI tool reading this file: open AGENTS.md in this repo and follow the instructions there.

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. 2d ago First seen · 11 lines · 97 tokens per session scan A c92ddc1e3504

Subscribe to this mod's changes

atom CLAUDE.md is an instructions file published in the GitHub repository machbuilds/atom (2 stars, last pushed 2mo ago), licensed MIT. It adds 97 tokens to every session, about $0.0005 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.