monorepo: Instructions file for Codex

AGENTS.md

monorepo AGENTS.md is an instructions file for Codex, OpenCode from shepherdjerred/monorepo. It costs 2,184 tokens per session, scanned A, original, GPL-3.0.

Repository instructions for coding agents working in a monorepo, a single repository containing multiple projects or packages. They cover the repository layout, engineering rules, credential checks, and ArgoCD cleanup safety.

In plain words
What is it for?
Use them when an agent needs to inspect or change this monorepo, check local 1Password or Cloudflare credentials, or work with the ArgoCD root application.
Why use it?
They give agents local rules and warnings they might otherwise miss, especially around secrets and removing ArgoCD applications.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md.

This is shepherdjerred/monorepo's own configuration. It tells Codex and OpenCode how to work on monorepo itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything monorepo configures →

Reuse

Borrowing it

Nothing to install: this file belongs to shepherdjerred/monorepo. 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/shepherdjerred/monorepo/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/shepherdjerred/monorepo

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.

agentmods badge for monorepo AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/shepherdjerred/monorepo/agents-md/github.svg)](https://agentmods.dev/instructions/shepherdjerred/monorepo/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/shepherdjerred/monorepo/agents-md"><img src="https://agentmods.dev/badge/instructions/shepherdjerred/monorepo/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.

agentmods 80×15 button for monorepo AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/shepherdjerred/monorepo/agents-md"><img src="https://agentmods.dev/badge/instructions/shepherdjerred/monorepo/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 2,184 This file is loaded in full into every session.
When invoked 2,184 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.02184 $0.02184
Opus 5.5 $0.00874 $0.00874
Sonnet 5.5 $0.00437 $0.00437
Haiku 4.5 $0.00218 $0.00218

Measured 10d ago against content hash 0e9ff7e78ab0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

monorepo 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 10d 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 · 196 lines

The source is not reproduced here

Licensed GPL-3.0

The repository is licensed GPL-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.

  1. 10d ago Changed · +18 lines · +389 tokens per session 0e9ff7e78ab0
  2. 12d ago Changed · -4 tokens per session 27e4a4c954c3
  3. 17d ago Changed · +4 lines · +74 tokens per session 7c976986f6ec
  4. 21d ago Changed · +4 lines · +47 tokens per session e719b3a57e82
  5. 22d ago Changed · +6 lines · +80 tokens per session 3eacceb0f289
  6. 24d ago Changed · +7 lines · +89 tokens per session af21cc6e00d0
  7. 1mo ago Changed · +3 tokens per session d6e1cd539e3e
  8. 1mo ago Changed · +2 lines · +32 tokens per session 4f19a63ca493
  9. 1mo ago Changed · -20 lines · -317 tokens per session 8826a2170cba
  10. 1mo ago First seen · 175 lines · 1,791 tokens per session scan A 39737975a7b2

Subscribe to this mod's changes

monorepo AGENTS.md is an instructions file published in the GitHub repository shepherdjerred/monorepo (104 stars, last pushed today), licensed GPL-3.0. It adds 2,184 tokens to every session, about $0.0087 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.

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