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chorus: Instructions file for Claude Code

CLAUDE.md

chorus CLAUDE.md is an instructions file for Claude Code from fusion2004/chorus. It costs 2,558 tokens per session, scanned A, original, no licence file.

Repository-specific instructions for Claude Code, covering the project, commands, architecture, and Sapphire auto-discovery.

In plain words
What is it for?
Working on fusion2004/chorus, using the right commands, and understanding its architecture and Sapphire discovery.
Why use it?
They help the coding agent understand the codebase and follow its existing way of finding Sapphire components.

Instructions file for Claude Code

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

This is fusion2004/chorus's own configuration. It tells Claude Code how to work on chorus 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 chorus configures →

not rated 5repo changed 26d ago A scan 2,558 tokens no licence
View source ↗ fusion2004/chorus
Reuse

Borrowing it

Nothing to install: this file belongs to fusion2004/chorus. 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/fusion2004/chorus/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/fusion2004/chorus

Made for: Claude Code.

Wrote 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.

agentmods badge for chorus CLAUDE.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/fusion2004/chorus/claude-md/github.svg)](https://agentmods.dev/instructions/fusion2004/chorus/claude-md)
Your own site
<a href="https://agentmods.dev/instructions/fusion2004/chorus/claude-md"><img src="https://agentmods.dev/badge/instructions/fusion2004/chorus/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for chorus CLAUDE.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/fusion2004/chorus/claude-md"><img src="https://agentmods.dev/badge/instructions/fusion2004/chorus/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 2,558 This file is loaded in full into every session.
When invoked 2,558 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 unknown 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 $0.02558 $0.02558
Opus 5.5 $0.01023 $0.01023
Sonnet 5.5 $0.00512 $0.00512
Haiku 4.5 $0.00256 $0.00256

Measured 26d ago against content hash fee52e6f4687, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

chorus 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 26d 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 · 112 lines

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.

Read it on GitHub

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. 26d ago Changed · -1 tokens per session fee52e6f4687
  2. 2mo ago First seen · 112 lines · 2,559 tokens per session scan A 30c24eea6e61

Subscribe to this mod's changes

chorus CLAUDE.md is an instructions file published in the GitHub repository fusion2004/chorus (5 stars, last pushed 12d ago), with no licence file. It adds 2,558 tokens to every session, about $0.0102 per session on Opus 5.5. 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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