Nion AGENTS.md

A set of AGENTS.md instructions for the Nion repository, covering the project overview, workspace layout, commands, and Rust conventions. AGENTS.md is a file that tells coding agents how to work in a project.

In plain words
What is it for?
Use it when modifying Echoer009/Nion, especially when navigating the workspace, running commands, or writing Rust.
Why use it?
It provides repository-specific context and working rules that a general coding agent would not know.

Instructions file for CodexOpenCode

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.

agentmods
npx agentmods add instructions/echoer009/nion/agents-md
Clone the repo
git clone --depth 1 https://github.com/Echoer009/Nion

Made for: Codex, OpenCode.

Per session 2,432 This file is loaded in full into every session.
When invoked 2,432 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
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 $0.02432 $0.02432
Opus 5 $0.01216 $0.01216
Sonnet 5 $0.00486 $0.00486
Haiku 4.5 $0.00243 $0.00243

Measured 2d ago against content hash 0736e096903a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

Nion 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 2d 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 · 177 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. 2d ago First seen · 177 lines · 2,432 tokens per session scan A 0736e096903a

Subscribe to this mod's changes

Nion AGENTS.md is an instructions file published in the GitHub repository Echoer009/Nion (18 stars, last pushed 1mo ago), licensed GPL-3.0. It adds 2,432 tokens to every session, about $0.0122 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.