A skill that creates or refreshes a repository’s root AGENTS.md file, which stores instructions for coding agents working on that project.

Copying global agent instructions into a project, adding repository-specific guidance, and updating the file when the canonical instructions change.

It keeps shared working rules and project-specific guidance in one local file, so agents can follow the same instructions in the repository.

agent-copy — Skill for Claude Code and Codex by shane9coy

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add shane9coy/Agent-Skill-Architecture-Guide --skill agent-copy

Clone the repo

git clone --depth 1 https://github.com/shane9coy/Agent-Skill-Architecture-Guide

Made for: Claude Code, Codex.

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/skills/shane9coy/agent-skill-architecture-guide/agent-copy/github.svg)](https://agentmods.dev/skills/shane9coy/agent-skill-architecture-guide/agent-copy)

Your own site

<a href="https://agentmods.dev/skills/shane9coy/agent-skill-architecture-guide/agent-copy"><img src="https://agentmods.dev/badge/skills/shane9coy/agent-skill-architecture-guide/agent-copy/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/skills/shane9coy/agent-skill-architecture-guide/agent-copy"><img src="https://agentmods.dev/badge/skills/shane9coy/agent-skill-architecture-guide/agent-copy.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 58 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,156 The whole file, excluding the scripts and references it only reads on demand.

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	$0.00058	$0.01156
Opus 5.5	$0.00023	$0.00462
Sonnet 5.5	$0.00012	$0.00231
Haiku 4.5	$0.00006	$0.00116

Measured 2mo ago against content hash 0bce45d691f9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

agent-copy 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.

skills/agent-copy/SKILL.md · 145 lines

How it starts

The opening of the file, as written. The whole thing — 145 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent Copy

This skill creates or refreshes a repo-root AGENTS.md file by copying the user's canonical global agent instructions, then appending a repo-specific guide for the current project.

Architecture:

canonical global instructions -> repo-local AGENTS.md -> repo-specific tail

Use one agent-copy skill for this workflow. Do not create separate runtime-specific variants such as agent-copy-codex, agent-copy-claude, or agent-copy-cursor; change the source path instead.

Default source:

$HOME/.codex/AGENTS.md

Default target:

./AGENTS.md

Codex is the default because this repo demonstrates a Codex-first setup. If the user's canonical instructions live somewhere else, use that source path instead. Examples include a Claude project instruction file, an OpenCode context file, or another agent-compatible global instruction file.

Only AGENTS.md files should be created, copied, or updated unless the user explicitly asks for another instruction file.

Core Rule

The repo-root ./AGENTS.md file must:

Start with an exact copy of the selected canonical global instruction source.
Append a repo-specific tail section titled ## Repo-Specific Guide.
Include only repo facts from filesystem inspection or the user's answers.
Mark unknowns as TBD - ask the user before implementing this area.

Do not paraphrase, summarize, or partially copy the canonical source file.

Workflow

1. Confirm The Canonical Source File

Check for the default source:

test -f "$HOME/.codex/AGENTS.md" && echo "$HOME/.codex/AGENTS.md"

If the file does not exist and the user wants Codex as the canonical source, tell the user to install the repo's root AGENTS.md template into their Codex root first:

mkdir -p "$HOME/.codex"
cp AGENTS.md "$HOME/.codex/AGENTS.md"

If the user is not using Codex, ask for the exact path to their equivalent canonical instruction file before copying anything.

2. Ground In The Repo

Run before editing:

Read the full file on GitHub · 145 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 · 145 lines · 58 tokens per session scan A 0bce45d691f9

Subscribe to this mod's changes

agent-copy is a skill published in the GitHub repository shane9coy/Agent-Skill-Architecture-Guide (20 stars, last pushed 5mo ago), licensed MIT. It adds 58 tokens to every session and 1,156 once invoked, about $0.0002 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.

Building agents agent-ai agent-architecture agent-skills ai-agent claude-skills mcp

agent-copy next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
agent-copyshane9coy/Agent-Skill-Architecture-Guide	Skill	20	5mo ago	MIT	A	58	Claude Code, Codex
exploratory-data-analysisK-Dense-AI/scientific-agent-skills	Skill	57k	4d ago	MIT	A	83	Claude Code
webhook-managementhoangsonww/Claude-Code-Agent-Monitor	Skill	1.2k	today	MIT	A	56	Claude Code, Codex
gesellschaftsrechtliche-satzungen-agbKlotzkette/claude-fuer-deutsches-recht	Skill	1.8k	today	Apache-2.0	A	69	Claude Code
accessibility-patternsvibeeval/vibecosystem	Skill	547	yesterday	MIT	A	24	Claude Code, Codex
render-3d-product-showcasegooseworks-ai/goose-skills	Skill	1.3k	6d ago	MIT	A	159	Claude Code, Codex
render-airdrop-carouselgooseworks-ai/goose-skills	Skill	1.3k	6d ago	MIT	A	207	Claude Code, Codex