What is mufify AGENTS.md?

Repository instructions for mufify, an offline music player for Android built with React Native and Expo.

Guiding development of local FLAC playback, playlists, shuffle modes, listening statistics, themes, and Turkish or English support.

They define the app's offline-only promise and the required setup, tools, and development loop so changes do not accidentally add network access.

How Yefee8/mufify configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to Yefee8/mufify. 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/Yefee8/mufify/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/Yefee8/mufify

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/yefee8/mufify/agents-md/github.svg)](https://agentmods.dev/instructions/yefee8/mufify/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/yefee8/mufify/agents-md"><img src="https://agentmods.dev/badge/instructions/yefee8/mufify/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/yefee8/mufify/agents-md"><img src="https://agentmods.dev/badge/instructions/yefee8/mufify/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 3,747 This file is loaded in full into every session.

When invoked 3,747 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	$0.03747	$0.03747
Opus 5.5	$0.01499	$0.01499
Sonnet 5.5	$0.00749	$0.00749
Haiku 4.5	$0.00375	$0.00375

Measured 2mo ago against content hash e2b024f7819e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mufify 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.

AGENTS.md · 316 lines

How it starts

The opening of the file, as written. The whole thing — 316 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Instructions for AI coding agents working in this repository. Human contributors should read this too — it's the house style.

Note: create-expo-app generates its own AGENTS.md and CLAUDE.md. Merge this file into the generated one rather than keeping two competing sets of rules.

Project

An offline-only local music player for Android, built with React Native and Expo. Plays FLAC and other lossless formats from the device. Local playlists, multiple shuffle algorithms, on-device listening statistics, dark/light themes, Turkish and English.

No network. No accounts. No telemetry. No analytics SDK. If a change introduces a network call, it is wrong. This is the app's core promise and the reason it exists.

Setup

Requirements: Node 22+, JDK 17 or 21, Android Studio with SDK Platform 36+, macOS or Linux. (Expo SDK 57 compiles against 36; this said 35 until app.sh checked it and was wrong.)

Environment (macOS)

None of this is set by default. Put it in ~/.zshrc — every "it works on my machine" failure in this project so far has been one of these three lines missing.

# Android Studio's bundled JBR is a perfectly good JDK. No separate install needed.
export JAVA_HOME="/Applications/Android Studio.app/Contents/jbr/Contents/Home"
export ANDROID_HOME="$HOME/Library/Android/sdk"
export PATH="$JAVA_HOME/bin:$ANDROID_HOME/platform-tools:$ANDROID_HOME/emulator:$PATH"

Verify before blaming the code:

java -version        # 17 or 21
adb devices          # your device, "device" not "unauthorized" or "offline"
npx expo-doctor

Daily loop

npm install
npx expo start --dev-client   # this is the normal one — JS/TS changes hot reload
npm run lint
npm run typecheck
npm test
npm run db:generate           # drizzle-kit: generate migration after schema change

npx expo run:android is only for native changes: adding or removing a native dependency, editing app.json, or changing a config plugin. It is a ten-minute build. Reaching for it after a TypeScript edit is the most common way to waste an afternoon here.

Read the full file on GitHub · 316 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.

2mo ago First seen · 316 lines · 3,747 tokens per session scan A e2b024f7819e

Subscribe to this mod's changes

mufify AGENTS.md is an instructions file published in the GitHub repository Yefee8/mufify (17 stars, last pushed 2d ago), licensed MIT. It adds 3,747 tokens to every session, about $0.0150 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.

Mobile flac flac-files flac-mp3 flac-player i18n i18next

mufify AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
mufify AGENTS.mdYefee8/mufify	Instructions file	17	2d ago	MIT	A	3,747	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	5,649	GitHub Copilot
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	today	MIT	A	4,680	Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	3,093	GitHub Copilot
vscode ai-customization.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	1,907	GitHub Copilot

mufify: Instructions file for Codex