What is gitjoin AGENTS.md?

Project instructions for gitjoin, a tool that makes a virtual monorepo. A monorepo is one repository that contains multiple related projects or packages.

Use them when editing gitjoin code, especially to follow its Go style, keep APIs small, avoid unnecessary global state, and run its check script.

They give contributors consistent rules for writing code and checking changes in the project.

How bep/gitjoin configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to bep/gitjoin. 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/bep/gitjoin/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/bep/gitjoin

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/bep/gitjoin/agents-md/github.svg)](https://agentmods.dev/instructions/bep/gitjoin/agents-md)

Your own site

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

Per session 114 This file is loaded in full into every session.

When invoked 114 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	$0.00114	$0.00114
Opus 5.5	$0.00046	$0.00046
Sonnet 5.5	$0.00023	$0.00023
Haiku 4.5	$0.00011	$0.00011

Measured 2mo ago against content hash 018a43bd3f0a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

gitjoin 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 · 9 lines

What it actually says

Brevity is good, don't be clever.
When doing copy-edits, try to stay as close to the style of the origin as possible.
Assume that the maintainers and readers of the code you write are Go experts:
- Don't use comments to explain the obvious.
- Use self-explanatory variable and function names.
- Use short variable names when the context is clear.
Never export symbols that's not needed outside of the package.
Avoid global state at (almost) all cost.
Confirm by running check.sh.

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 · 9 lines · 114 tokens per session scan A 018a43bd3f0a

Subscribe to this mod's changes

gitjoin AGENTS.md is an instructions file published in the GitHub repository bep/gitjoin (4 stars, last pushed 14d ago), licensed Apache-2.0. It adds 114 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.

Git and workflow github monorepo

gitjoin AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
gitjoin AGENTS.mdbep/gitjoin	Instructions file	4	14d ago	Apache-2.0	A	114	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
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

gitjoin: Instructions file for Codex