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.
npx skills add shane9coy/Agent-Skill-Architecture-Guide --skill agent-copygit clone --depth 1 https://github.com/shane9coy/Agent-Skill-Architecture-GuideWrote 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.
[](https://agentmods.dev/skills/shane9coy/agent-skill-architecture-guide/agent-copy)<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.
<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>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 | $0.00029 | $0.00578 |
| Sonnet 5 | $0.00012 | $0.00231 |
| Haiku 4.5 | $0.00006 | $0.00116 |
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 9d 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.
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:
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.
- 9d ago First seen · 145 lines · 58 tokens per session scan A 0bce45d691f9
agent-copy is a skill published in the GitHub repository shane9coy/Agent-Skill-Architecture-Guide (17 stars, last pushed 2mo ago), licensed MIT. It adds 58 tokens to every session and 1,156 once invoked, about $0.0003 per session on Opus 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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