What is agency-agents-app AGENTS.md?

A set of instructions for AGENTS.md, a file that tells coding agents how to work in a project. It defines startup checks, task rules, memory handling, budgets, reuse requirements, and quality practices.

Use it to guide AI-assisted development sessions, enforce reuse and refactoring checks, manage task state, document work, and support tools such as Claude, Cursor, Copilot, and Aider.

It gives the agent a shared operating procedure, helping it follow project constraints and avoid unnecessary new files or rewrites.

How msitarzewski/agency-agents-app configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to msitarzewski/agency-agents-app. 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/msitarzewski/agency-agents-app/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/msitarzewski/agency-agents-app

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/msitarzewski/agency-agents-app/agents-md/github.svg)](https://agentmods.dev/instructions/msitarzewski/agency-agents-app/agents-md)

Your own site

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

Per session 8,524 This file is loaded in full into every session.

When invoked 8,524 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	$0.08524	$0.08524
Opus 5.5	$0.03410	$0.03410
Sonnet 5.5	$0.01705	$0.01705
Haiku 4.5	$0.00852	$0.00852

Measured 2mo ago against content hash ff7e125d3d09, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

agency-agents-app 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.

Origin

Copies of this mod

3 near-identical copies found in the catalogue:

AGENT-ZERO AGENTS.md — 100% identical, 0 lines differ
Agency-AI-Agents AGENTS.md — 100% identical, 0 lines differ
phase AGENTS.md — 88% identical, 46 lines differ

AGENTS.md · 1,022 lines

How it starts

The opening of the file, as written. The whole thing — 1,022 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Version: 2.2 (2025-03-04) | Compatibility: Claude, Cursor, Copilot, Cline, Aider, all AGENTS.md-compatible tools Status: Canonical single-file guide for AI-assisted development

Compliance & Core Rules
Session Startup
- Compaction Protocol
Memory Bank
State Machine
Task Contract & Budgets
Quality & Documentation
Example Workflow
Troubleshooting

1. Compliance & Core Rules

Startup Compliance (Output Every Session)

COMPLIANCE CONFIRMED: Reuse over creation

⚠️  GIGO PREVENTION - User Responsibilities:
📋 Clear task objectives | 🔗 Historical context | 🎯 Success criteria
⚙️  Architectural constraints | 🎖️ You lead - clear input = excellent output

[Continue with Memory Bank loading...]

The Four Sacred Rules

Rule	Requirement	Validation
❌ No new files without reuse analysis	Search codebase, reference files that cannot be extended, provide exhaustive justification	Before creating: "Analyzed X, Y, Z. Cannot extend because [technical reason]"
❌ No rewrites when refactoring possible	Prefer incremental improvements, justify why refactoring won't work	"Refactoring X impossible because [specific limitation]"
❌ No generic advice	Cite `file:line`, show concrete integration points, include migration strategies	Every suggestion includes `file:line` citation
❌ No ignoring existing architecture	Load patterns before changes, extend existing services/components, consolidate duplicates	"Extends existing pattern at `file:line`"

Reuse Validation Checklist (Before Creating Files)

- [ ] Searched: [search terms] → found: [list files]
- [ ] Analyzed extension:
  - [ ] `existing/file1.ext` - Cannot extend: [specific technical reason]
  - [ ] `existing/file2.ext` - Cannot extend: [specific technical reason]
- [ ] Checked patterns: `systemPatterns.md#[section]`
- [ ] Justification: New file needed because [exhaustive reasoning]

Read the full file on GitHub · 1,022 lines

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 · 1,022 lines · 8,524 tokens per session scan A ff7e125d3d09

Subscribe to this mod's changes

agency-agents-app AGENTS.md is an instructions file published in the GitHub repository msitarzewski/agency-agents-app (913 stars, last pushed 5d ago), licensed MIT. It adds 8,524 tokens to every session, about $0.0341 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.

agency-agents-app AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
agency-agents-app AGENTS.mdmsitarzewski/agency-agents-app	Instructions file	913	5d ago	MIT	A	8,524	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

agency-agents-app: Instructions file for Codex