What is arch-compiler AGENTS.md?

A repository guide for an architecture compiler: a tool that turns a YAML specification into repeatable architecture decision documents. It explains the project structure, which skills to use, and which folders agents must not change.

Use it before compiling an architecture, implementing an approved design, or inspecting the project’s read-only tools, schemas, and patterns.

It gives coding agents the rules and boundaries needed to use the repository safely and choose the right workflow.

How inetgas/arch-compiler configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to inetgas/arch-compiler. 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/inetgas/arch-compiler/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/inetgas/arch-compiler

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/inetgas/arch-compiler/agents-md/github.svg)](https://agentmods.dev/instructions/inetgas/arch-compiler/agents-md)

Your own site

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

Per session 1,204 This file is loaded in full into every session.

When invoked 1,204 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	$0.01204	$0.01204
Opus 5.5	$0.00482	$0.00482
Sonnet 5.5	$0.00241	$0.00241
Haiku 4.5	$0.00120	$0.00120

Measured 2mo ago against content hash 237b974e80b4, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

arch-compiler 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 · 117 lines

How it starts

The opening of the file, as written. The whole thing — 117 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent Guide — Architecture Compiler

Read this before using any skill in this repo.

Repo Contract

arch-compiler/
├── README.md
├── AGENTS.md
├── README-AGENTS.md
├── tools/        <-- read-only for agents
├── schemas/      <-- read-only for agents
├── config/       <-- read-only for agents
├── scripts/      <-- read-only for agents
├── patterns/     <-- read-only for agents
└── skills/
    ├── using-arch-compiler/
    │   └── SKILL.md
    ├── compiling-architecture/
    │   └── SKILL.md
    └── implementing-architecture/
        └── SKILL.md

The important split is:

AGENTS.md = canonical global agent rules
skills/using-arch-compiler/SKILL.md = entrypoint/router skill
skills/compiling-architecture/SKILL.md = compile and finalise architecture
skills/implementing-architecture/SKILL.md = implement an already-approved architecture

What This Repo Does

Given a YAML spec, the compiler selects applicable architecture patterns and produces deterministic architecture decision artifacts. Same input produces the same output every time. No LLM inference happens inside the compiler.

Which Skill To Use

Situation	Skill
User wants help choosing the correct architecture workflow	`skills/using-arch-compiler/SKILL.md`
User wants to compile a spec, select patterns, or finalise an architecture	`skills/compiling-architecture/SKILL.md`
User wants to implement a system from an approved `docs/architecture/` folder	`skills/implementing-architecture/SKILL.md`

If you are unsure, start with skills/using-arch-compiler/SKILL.md.

Read-Only Boundaries

Agents may read any file in this repo.

Unless the human explicitly asks for compiler-maintenance work in this repo:

treat tools/ as read-only
treat schemas/ as read-only
treat config/ as read-only
treat patterns/ as read-only

Agents may:

run the compiler
run audit tools
run tests

Agents may not, unless explicitly directed by the human:

edit an existing pattern in patterns/
edit schemas/canonical-schema.yaml
edit schemas/pattern-schema.yaml
edit config/defaults.yaml
place a newly authored pattern directly into patterns/ just because the human asked to "author" it

Read the full file on GitHub · 117 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 · 117 lines · 1,204 tokens per session scan A 237b974e80b4

Subscribe to this mod's changes

arch-compiler AGENTS.md is an instructions file published in the GitHub repository inetgas/arch-compiler (10 stars, last pushed 5mo ago), licensed MIT. It adds 1,204 tokens to every session, about $0.0048 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 ai-governance architectural-decision-records architecture architecture-as-code architecture-harness

arch-compiler AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
arch-compiler AGENTS.mdinetgas/arch-compiler	Instructions file	10	5mo ago	MIT	A	1,204	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

arch-compiler: Instructions file for Codex