Borrowing it
Nothing to install: this file belongs to BreetyGreen/Myco. 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/BreetyGreen/Myco/master/AGENTS.mdgit clone --depth 1 https://github.com/BreetyGreen/MycoWrote 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/breetygreen/myco/agents-md)<a href="https://agentmods.dev/instructions/breetygreen/myco/agents-md"><img src="https://agentmods.dev/badge/instructions/breetygreen/myco/agents-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/breetygreen/myco/agents-md"><img src="https://agentmods.dev/badge/instructions/breetygreen/myco/agents-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 | $0.01924 | $0.01924 |
| Opus 5.5 | $0.00770 | $0.00770 |
| Sonnet 5.5 | $0.00385 | $0.00385 |
| Haiku 4.5 | $0.00192 | $0.00192 |
Grade A, and why
Myco AGENTS.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 2mo 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 — 148 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md — orientation for AI agents & contributors
This file is read automatically by Codex CLI (and often symlinked to
CLAUDE.md). It's the fastest way for an AI agent — or a human — to get oriented after a freshgit clone, on a brand-new machine, and continue the work. Keep it short and factual.
What this project is
Myco — "the mycelial layer for your AI agents." A self-contained macOS
menu-bar app that connects the AI coding agents on your Mac so they can share
skills, hand off conversations, and unify history. The repo
directory is still named multi-agent-skill-sharing/ for historical reasons;
the product is Myco.
Three capabilities, all read-only toward the agents (Myco never writes back into any agent's storage):
- Share skills — fan one
SKILL.mdout to each agent's repo skill dir. - Relay conversations — package one chat as paste-ready text to continue in another agent, in a legitimately new session (no forged IDs, no DB writes).
- Unify history — read every agent's local transcripts into one neutral, searchable, offline timeline.
Architecture (two layers)
| Layer | Where | What |
|---|---|---|
| App — macOS | app/Sources/Myco/ |
SwiftUI + AppKit menu-bar app (NSStatusItem + NSPopover). Builds with Command Line Tools only — no Xcode. |
| App — Windows | app-windows/ |
WPF tray app (WinForms NotifyIcon + WPF panel, zero NuGet deps). Builds with the .NET 8 SDK (dotnet build). |
| Engine (the brains) | engine/ |
Pure Python-stdlib CLIs both apps call via Process. No third-party deps. |
The native apps are thin shells; all real work (detection, distribution, chat
parsing, handoff) lives in the Python engine. The installed macOS .app
bundles the engine into Contents/Resources/engine/ and uses macOS's own
python3; the Windows zip ships the engine next to Myco.exe plus an
embedded python.org Python — both fully self-contained. On Windows, agent
detection also runs in the engine (agent_status.py --json) rather than being
reimplemented in C#.
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.
- 2mo ago First seen · 148 lines · 1,924 tokens per session scan A 428d2b5f08ee
Myco AGENTS.md is an instructions file published in the GitHub repository BreetyGreen/Myco (2 stars, last pushed 3mo ago), licensed MIT. It adds 1,924 tokens to every session, about $0.0077 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
vscode buildNext.instructions.md
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).
deno copilot-instructions.md
Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.