What is mu AGENTS.md?

Project instructions for micro/mu, covering its access model, development process, services, and the records exchanged between services and their clients. A service is a program that provides a function to another program or user.

Use them when developing or modifying the micro/mu project, especially around services, clients, and their stored records.

They give an agent the project-specific terms and boundaries needed to work on the code correctly.

How micro/mu configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to micro/mu. 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/micro/mu/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/micro/mu

Made for: Codex, OpenCode.

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/micro/mu/agents-md/github.svg)](https://agentmods.dev/instructions/micro/mu/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/micro/mu/agents-md"><img src="https://agentmods.dev/badge/instructions/micro/mu/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/micro/mu/agents-md"><img src="https://agentmods.dev/badge/instructions/micro/mu/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 9,655 This file is loaded in full into every session.

When invoked 9,655 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.

Model	Per session	Once invoked
Fable 5.1	$0.09655	$0.09655
Opus 5.5	$0.03862	$0.03862
Sonnet 5.5	$0.01931	$0.01931
Haiku 4.5	$0.00966	$0.00966

Measured today against content hash ed4b5a781771, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mu 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 today.

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.

AGENTS.md · 724 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

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.

today Changed · -1 lines · +20 tokens per session ed4b5a781771
11d ago Changed · +8 lines · +87 tokens per session abedc4610ae7
13d ago Changed · +2 lines · +33 tokens per session 6170d1e68330
14d ago Changed · +2 lines · +136 tokens per session 695b90435248
15d ago Changed · +62 tokens per session d14d5b22cd98
16d ago Changed · +10 lines · +124 tokens per session f5a05729769b
18d ago Changed · +24 lines · +325 tokens per session 031907350c91
19d ago Changed · +25 lines · +303 tokens per session 46198d9de034
21d ago Changed · +1 lines · +50 tokens per session f4b00b8d374f
23d ago First seen · 653 lines · 8,515 tokens per session scan A e00c8d73bcb2

Subscribe to this mod's changes

mu AGENTS.md is an instructions file published in the GitHub repository micro/mu (438 stars, last pushed yesterday), licensed AGPL-3.0. It adds 9,655 tokens to every session, about $0.0386 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 2026-08-30.

agent assistant micro

mu AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
mu AGENTS.mdmicro/mu	Instructions file	438	yesterday	AGPL-3.0	A	9,655	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

mu: Instructions file for Codex