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/valpere/chorus/claude-mdgit clone --depth 1 https://github.com/valpere/chorusWrote 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/valpere/chorus/claude-md)<a href="https://agentmods.dev/instructions/valpere/chorus/claude-md"><img src="https://agentmods.dev/badge/instructions/valpere/chorus/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 5.1 | $0.00252 | $0.00252 |
| Opus 5 | $0.00126 | $0.00126 |
| Sonnet 5 | $0.00050 | $0.00050 |
| Haiku 4.5 | $0.00025 | $0.00025 |
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 5d 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.
What it actually says
@AGENTS.md
Claude Code
The chorus plugin is installed from the repo root:
claude plugin install https://github.com/valpere/chorus
Workflow pattern commands live in plugins/chorus/commands/. Run them via:
node plugins/chorus/scripts/companion.mjs check-all
node plugins/chorus/scripts/companion.mjs council "<task>"
node plugins/chorus/scripts/companion.mjs review
node plugins/chorus/scripts/companion.mjs debug "<symptom>"
node plugins/chorus/scripts/companion.mjs second-opinion [--agent <name>] "<approach>"
Maintainer
Claude Code is the primary host and maintainer for this project.
When adding a new agent or modifying the delegation mesh, follow:
docs/add-agent-checklist.md— step-by-step guide for adding a new agent.github/instructions/skill-files.instructions.md— canonical CLI flags and SKILL.md format rules for all agents.github/instructions/companion-scripts.instructions.md— companion script conventions (stdio, stripFlags, check-all coverage)
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.
- 5d ago First seen · 27 lines · 252 tokens per session scan A c3dbc18631d8
chorus CLAUDE.md is an instructions file published in the GitHub repository valpere/chorus (10 stars, last pushed 3mo ago), licensed MIT. It adds 252 tokens to every session, about $0.0013 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
Project-AMBER AGENTS.md
AGENTS.md instructions for JJHbrams/Project-AMBER, covering agent orchestration, roles and non-negotiable rules.
TokenPilot CLAUDE.md
Claude Code instructions for eowlsdh/TokenPilot, a project described as: Local-first macOS menu bar utility for AI coding-tool usage metadata.
Skills AGENTS.md
AGENTS.md instructions for AceDataCloud/Skills, covering acedatacloud agent skills, available skills, ai music & audio, ai image generation and ai video generation.
Skills copilot-instructions.md
Copilot instructions for AceDataCloud/Skills, covering copilot instructions for skills, sync from docs, project structure and important.
semble-hooks CLAUDE.md
Instructions for benediktkraus/semble-hooks, covering semble hooks — claude.md, was ist das, projekt-typ, tech-stack and architektur-referenz.
Project-AMBER project-guides.instructions.md
Project coding guidelines, todo monitoring rules, and context for AI agents working on Project Engram.