What is core AGENTS.md?

A project instruction file for ReactUnity that explains how to prepare release notes with Tegami, a package versioning and publishing tool.

Use it when documenting fixes, preparing package version changes, or creating pending changelog files for a release.

It prevents release information from being written in the wrong files or without the required package and heading details.

How ReactUnity/core configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to ReactUnity/core. 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/ReactUnity/core/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/ReactUnity/core

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/reactunity/core/agents-md/github.svg)](https://agentmods.dev/instructions/reactunity/core/agents-md)

Your own site

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

Per session 245 This file is loaded in full into every session.

When invoked 245 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 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	$0.00245	$0.00245
Opus 5.5	$0.00098	$0.00098
Sonnet 5.5	$0.00049	$0.00049
Haiku 4.5	$0.00024	$0.00024

Measured 2mo ago against content hash bccc87e27271, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

core 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 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

stoop AGENTS.md — 95% identical, 4 lines differ

AGENTS.md · 40 lines

What it actually says

@CLAUDE.md

Release workflow

This repository uses Tegami for versioning and publishing.

Write changelog files

Create pending changelog files under .tegami/ as YYYY-MM-DD-{hash}.md.

See the changelog format docs for details.

Example

---
packages:
  "npm:@acme/ui": patch
---

### Fix button hover state

The hover color now matches the design system.

Package references

Use package names, ids, or groups in frontmatter. For example:

"@acme/ui" — package name
"npm:@acme/ui" — package id
"group:acme" — every package in a group

Rules:

Include YAML frontmatter with packages
Include at least one #, ##, or ### heading in the body
Write user-facing release notes under each heading
Do not edit the publish lock file (.tegami\publish-lock.yaml) or package CHANGELOG.md files directly

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 · 40 lines · 245 tokens per session scan A bccc87e27271

Subscribe to this mod's changes

core AGENTS.md is an instructions file published in the GitHub repository ReactUnity/core (904 stars, last pushed 4d ago), licensed MIT. It adds 245 tokens to every session, about $0.0010 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.

Git and workflow Productivity React react-renderer ugui ui unity unity3d

core AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
core AGENTS.mdReactUnity/core	Instructions file	904	4d ago	MIT	A	245	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	today	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

core: Instructions file for Codex