What is CoreAI AGENTS.md?

Project instructions for CoreAI, including its runtime-first goal, required conventions, and verification steps when the Unity editor has locked the project.

Understanding CoreAI’s priorities, following its enforced conventions, and checking changes safely in a Unity project.

They help agents work within the project’s rules and avoid changes that conflict with the editor’s file lock.

How NeoXider/CoreAI configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to NeoXider/CoreAI. 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/NeoXider/CoreAI/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/NeoXider/CoreAI

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/neoxider/coreai/agents-md/github.svg)](https://agentmods.dev/instructions/neoxider/coreai/agents-md)

Your own site

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

Per session 1,516 This file is loaded in full into every session.

When invoked 1,516 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 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.

Model	Per session	Once invoked
Fable 5.1	$0.01516	$0.01516
Opus 5.5	$0.00606	$0.00606
Sonnet 5.5	$0.00303	$0.00303
Haiku 4.5	$0.00152	$0.00152

Measured 22d ago against content hash 1dc72d9106eb, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

CoreAI 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 22d 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 · 84 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

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.

22d ago Changed · +4 lines · +93 tokens per session 1dc72d9106eb
1mo ago Changed · +16 lines · +303 tokens per session b2731cf768ac
1mo ago Changed · +18 lines · +387 tokens per session de7fdcbbb2a0
2mo ago Changed · +6 lines · +126 tokens per session e3393180c4ea
2mo ago Changed · +6 tokens per session 2101a394380e
2mo ago First seen · 40 lines · 601 tokens per session scan A 7a8c0d4371d9

Subscribe to this mod's changes

CoreAI AGENTS.md is an instructions file published in the GitHub repository NeoXider/CoreAI (8 stars, last pushed 9d ago), with no licence file. It adds 1,516 tokens to every session, about $0.0061 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.

LLM ai-agents function-calling game-ai game-development unity3d

CoreAI AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
CoreAI AGENTS.mdNeoXider/CoreAI	Instructions file	8	9d ago	none	A	1,516	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

CoreAI: Instructions file for Codex