What is nunchuck AGENTS.md?

Repository instructions for Nunchuck, including special index and summary files that help agents find information quickly.

Use it to locate documentation through the index files, follow the project’s information lookup rules, and apply its rules when creating or changing skills.

It gives agents a documented way to navigate the repository and protects the instruction file from accidental edits.

How JordanGunn/nunchuck configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to JordanGunn/nunchuck. 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/JordanGunn/nunchuck/master/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/JordanGunn/nunchuck

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/jordangunn/nunchuck/agents-md/github.svg)](https://agentmods.dev/instructions/jordangunn/nunchuck/agents-md)

Your own site

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

Per session 137 This file is loaded in full into every session.

When invoked 137 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 original 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	$0.00137	$0.00137
Opus 5.5	$0.00055	$0.00055
Sonnet 5.5	$0.00027	$0.00027
Haiku 4.5	$0.00014	$0.00014

Measured 2mo ago against content hash ac853814885b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

nunchuck 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.

AGENTS.md · 20 lines

What it actually says

AGENTS INSTRUCTIONS

Special files

The following files are specially included for agent consumption:

.INDEX.md: Directory indices throughout the repository. Use for fast information discovery and content lookup.
.SUMMARY.md: High-level summaries of directories. Use for quick overview.

Information Lookup

Use the index files to navigate documentation:

Documentation entrypoint

Rules

Do not modify this file unless explicitly asked.
When creating or modifying skills, treat https://github.com/JordanGunn/asi as the authoritative governance and skill design documentation source; follow its llms.txt entry points (progressive disclosure).

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.

2mo ago First seen · 20 lines · 137 tokens per session scan A ac853814885b

Subscribe to this mod's changes

nunchuck AGENTS.md is an instructions file published in the GitHub repository JordanGunn/nunchuck (9 stars, last pushed 9mo ago), licensed MIT. It adds 137 tokens to every session, about $0.0005 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.

agent-skills deprecated skills

nunchuck AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
nunchuck AGENTS.mdJordanGunn/nunchuck	Instructions file	9	9mo ago	MIT	A	137	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	yesterday	MIT	A	7,461	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
vscode ai-customization.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	1,907	GitHub Copilot

nunchuck: Instructions file for Codex