What is mutsu AGENTS.md?

Repository instructions for mutsu, covering its structure, build and test commands, and coding conventions.

Navigating the repository, building the project, running tests, organising modules, and following its naming and style conventions.

They give an agent the project-specific rules needed to make compatible changes and validate them correctly.

How tokuhirom/mutsu configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to tokuhirom/mutsu. 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/tokuhirom/mutsu/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/tokuhirom/mutsu

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/tokuhirom/mutsu/agents-md/github.svg)](https://agentmods.dev/instructions/tokuhirom/mutsu/agents-md)

Your own site

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

Per session 11,560 This file is loaded in full into every session.

When invoked 11,560 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	$0.11560	$0.11560
Opus 5.5	$0.04624	$0.04624
Sonnet 5.5	$0.02312	$0.02312
Haiku 4.5	$0.01156	$0.01156

Measured 12d ago against content hash 9711a08a4b87, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mutsu 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 12d 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.

AGENTS.md · 560 lines

The source is not reproduced here

Licensed Artistic-2.0

The repository is licensed Artistic-2.0, 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.

12d ago Changed · +23 tokens per session 9711a08a4b87
13d ago Changed · +3 lines · +44 tokens per session e7e6c15d9d54
15d ago Changed · -3 tokens per session f189d1aae7c2
16d ago Changed · +6 lines · +142 tokens per session b5f638a65f35
17d ago Changed · +3 lines · +57 tokens per session 37145f1f46ed
18d ago Changed · +8 lines · +163 tokens per session 096c91bba726
22d ago Changed · -9 tokens per session 72b7986c1b6b
25d ago Changed · +11 lines · +309 tokens per session 7b0bd5bcd82b
26d ago Changed · +6 lines · +156 tokens per session 2d1ac29bde45
29d ago First seen · 523 lines · 10,678 tokens per session scan A 2a4d322518ef

Subscribe to this mod's changes

mutsu AGENTS.md is an instructions file published in the GitHub repository tokuhirom/mutsu (30 stars, last pushed today), licensed Artistic-2.0. It adds 11,560 tokens to every session, about $0.0462 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.

mutsu AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
mutsu AGENTS.mdtokuhirom/mutsu	Instructions file	30	today	Artistic-2.0	A	11,560	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

mutsu: Instructions file for Codex