Borrowing it
Nothing to install: this file belongs to actinon-com/brass-monkey. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/actinon-com/brass-monkey/main/CLAUDE.mdgit clone --depth 1 https://github.com/actinon-com/brass-monkeyWrote 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/actinon-com/brass-monkey/claude-md)<a href="https://agentmods.dev/instructions/actinon-com/brass-monkey/claude-md"><img src="https://agentmods.dev/badge/instructions/actinon-com/brass-monkey/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.
<a href="https://agentmods.dev/instructions/actinon-com/brass-monkey/claude-md"><img src="https://agentmods.dev/badge/instructions/actinon-com/brass-monkey/claude-md.svg" alt="Reviewed on agentmods" width="80" 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 | $0.01268 | $0.01268 |
| Opus 5.5 | $0.00507 | $0.00507 |
| Sonnet 5.5 | $0.00254 | $0.00254 |
| Haiku 4.5 | $0.00127 | $0.00127 |
Grade A, and why
brass-monkey 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 1mo 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.
How it starts
The opening of the file, as written. The whole thing — 99 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Brass-Monkey — Claude Code Working Context
This file mirrors the intent of
GEMINI.mdfor Claude Code. Where the two overlap, they must stay consistent. If you prefer a single source of truth, replace the "Shared Mandates" section below with an import ofGEMINI.md(verify the current import syntax against the Claude Code docs before relying on it).
Current Initiative: Claude Packaging (v1.6.x → Claude-installable)
Brass-Monkey already ships as a working stdio MCP server consumed by Gemini CLI
and Antigravity. The active goal is to make it installable and upgradeable on
Claude (Claude Code plugin + marketplace as the primary path; a Claude Desktop
bundle as a secondary path; raw claude mcp add as the universal fallback) while
keeping Gemini/Antigravity working unchanged.
The work is tracked as a checklist in docs/claude-packaging-plan.md. Treat
that file as the source of truth for progress: read it at the start of a session,
check off items as their "Done when" criteria are met, and commit the updated
file.
Non-negotiable rules for this initiative
- Verify formats against live docs — do not trust memory. Before
implementing the Claude Code plugin/marketplace phase or the Desktop bundle
phase, fetch and read the current official documentation and follow the live
schema:
- Claude Code docs map:
https://docs.anthropic.com/en/docs/claude-code/claude_code_docs_map.md - Claude docs:
https://docs.claude.comPlugin manifest structure, marketplace manifest structure, and the desktop bundle format/name (.dxtvs.mcpb) all change; confirm them before writing any manifest.
- Claude Code docs map:
- Branch protection.
mainis protected. All work happens on arelease-1.6.x(orrelease-1.7.0if treated as a feature bump) branch. Never commit directly tomain. Finalize via Pull Request; the Author (Matt) reviews and merges. - Additive, not forking. The stdio MCP server (
src/mcp-server.ts→dist/bundle/index.js) is the shared core. Each ecosystem gets its own thin manifest pointing at the same launch command. Do not fork server logic per platform. - One phase per session. Use plan mode to propose before editing, gate each
phase on
npm test+ a manual MCP Inspector check, commit, then compact/clear before the next phase.
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.
- 1mo ago First seen · 99 lines · 1,268 tokens per session scan A 41c65b46253e
brass-monkey CLAUDE.md is an instructions file published in the GitHub repository actinon-com/brass-monkey (2 stars, last pushed 2d ago), licensed MIT. It adds 1,268 tokens to every session, about $0.0051 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.
Other instructions, from other repositories
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Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
vscode model-prompts.instructions.md
Model-specific prompt authoring and registry guidelines.