aionrs: Instructions file for Codex

AGENTS.md

aionrs AGENTS.md is an instructions file for Codex, OpenCode from iOfficeAI/aionrs. It costs 2,560 tokens per session, scanned B, original, Apache-2.0.

A guide for a Rust command-line AI agent that connects to several language-model providers and supports tools, MCP servers, skills, hooks, and long-term memory. Rust is the programming language used by the project.

In plain words
What is it for?
It helps with provider connections, configuration, tool execution, streaming JSON communication, memory, hooks, and crate-level tests.
Why use it?
It explains how the workspace's crates are divided and prevents dependencies from being arranged in circular or incorrect directions.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions subagents; mentions Claude Code; mentions AGENTS.md.

This is iOfficeAI/aionrs's own configuration. It tells Codex and OpenCode how to work on aionrs itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything aionrs configures →

Reuse

Borrowing it

Nothing to install: this file belongs to iOfficeAI/aionrs. 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/iOfficeAI/aionrs/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/iOfficeAI/aionrs

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.

agentmods badge for aionrs AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/iofficeai/aionrs/agents-md/github.svg)](https://agentmods.dev/instructions/iofficeai/aionrs/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/iofficeai/aionrs/agents-md"><img src="https://agentmods.dev/badge/instructions/iofficeai/aionrs/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.

agentmods 80×15 button for aionrs AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/iofficeai/aionrs/agents-md"><img src="https://agentmods.dev/badge/instructions/iofficeai/aionrs/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 2,560 This file is loaded in full into every session.
When invoked 2,560 The same file — it is already loaded in full.
Security scan B 1 finding. 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.02560 $0.02560
Opus 5.5 $0.01024 $0.01024
Sonnet 5.5 $0.00512 $0.00512
Haiku 4.5 $0.00256 $0.00256

Measured 2mo ago against content hash 8e462d00f55b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

aionrs AGENTS.md scanned grade B with 1 finding 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.

Strips warnings and disclaimersmediumAnti-refusal

Omitting safety caveats hides risk from the user and is a common jailbreak preamble.

- `cargo clippy` must pass without warnings
AGENTS.md · 231 lines

How it starts

The opening of the file, as written. The whole thing — 231 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Rules and conventions for AI assistants and contributors working on aionrs.

Overview

aionrs is a multi-provider AI agent CLI written in Rust. It connects to LLM providers (Anthropic, OpenAI, AWS Bedrock, Google Vertex AI), orchestrates built-in tools (Read, Write, Edit, ExecCommand, Grep, Glob, ViewImage, Spawn), supports MCP servers, skills, hooks, and long-term memory. It also exposes a JSON stream protocol for host integration (e.g. Electron-based AionUI).

Tech stack: Rust 2021 edition, stable toolchain, Cargo workspace under crates/.

Crate Map

Dependencies flow downward — never introduce circular or upward references.

Layer Crate Responsibility
Bottom aion-types Shared provider-neutral data types (LLM, message, tool) — zero internal deps
Bottom aion-compact Context compression algorithms (folding, sanitization, tokenization)
Mid aion-config Configuration, ProviderCompat, auth, hooks, logging (create_file_layer), cross-platform shell helpers
Mid aion-protocol JSON stream protocol (events, commands, approval manager) for host integration
Mid aion-providers LLM provider implementations (Anthropic, OpenAI, Bedrock, Vertex)
Mid aion-tools Local tools (Read, Write, Edit, ExecCommand, Grep, Glob, ViewImage, ToolSearch)
Mid aion-mcp MCP (Model Context Protocol) client
Mid aion-skills Skills system (prompt snippets, hooks, permissions, shell expansion)
Mid aion-memory Long-term cross-session memory (user prefs, feedback, project context)
Top aion-agent Agent engine, session management, orchestration, and agent-level tools such as Spawn
Top aion-cli CLI binary entry point

When adding new functionality, place it in the lowest crate where it semantically belongs. Don't create a new crate just for one shared function. Run cargo metadata to verify dependency changes fit the graph.

Read the full file on GitHub · 231 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.

  1. 2mo ago First seen · 231 lines · 2,560 tokens per session scan B 8e462d00f55b

Subscribe to this mod's changes

aionrs AGENTS.md is an instructions file published in the GitHub repository iOfficeAI/aionrs (131 stars, last pushed 4d ago), licensed Apache-2.0. It adds 2,560 tokens to every session, about $0.0102 per session on Opus 5.5. A static security scan graded it B with 1 finding (strips warnings and disclaimers). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Related

aionrs AGENTS.md compared with instructions from other repositories

aionrs AGENTS.md next to 6 instructions from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
aionrs AGENTS.mdiOfficeAI/aionrsInstructions file1314d agoApache-2.0B2,560Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA9,719GitHub Copilot
next.js AGENTS.mdvercel/next.jsInstructions file143kyesterdayMITA7,461Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchainInstructions file149kyesterdayMITA4,680Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA5,516GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA3,093GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harnessInstructions file274k2d agoMITA4,313Codex, OpenCode