Borrowing it
Nothing to install: this file belongs to Teczer/fast-expo-app. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/Teczer/fast-expo-app/main/AGENTS.mdgit clone --depth 1 https://github.com/Teczer/fast-expo-appWrote 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.
[](https://agentmods.dev/instructions/teczer/fast-expo-app/agents-md)<a href="https://agentmods.dev/instructions/teczer/fast-expo-app/agents-md"><img src="https://agentmods.dev/badge/instructions/teczer/fast-expo-app/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.
<a href="https://agentmods.dev/instructions/teczer/fast-expo-app/agents-md"><img src="https://agentmods.dev/badge/instructions/teczer/fast-expo-app/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.07730 | $0.07730 |
| Opus 5.5 | $0.03092 | $0.03092 |
| Sonnet 5.5 | $0.01546 | $0.01546 |
| Haiku 4.5 | $0.00773 | $0.00773 |
Grade C, and why
fast-expo-app AGENTS.md scanned grade C 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.
Recursive force deletehighDestructive command
rm -rf with a variable or a broad path is one typo away from removing the wrong tree.
"clean": "rm -rf node_modules/.cache .expo && bun expo start --clear" How it starts
The opening of the file, as written. The whole thing — 1,131 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md - Fast Expo App Monorepo
Table of Contents
- Project Overview
- Monorepo Architecture
- Project Structure
- Tech Stack
- Getting Started
- Development Workflows
- Turborepo & Workspaces
- CLI Package
- Template (Boilerplate)
- Website Package
- Optional Modules
- Coding Conventions
- Scripts Reference
- Best Practices
Project Overview
Fast Expo App is a complete monorepo containing:
- A CLI tool (
fast-expo-app) for scaffolding React Native projects - A production-ready boilerplate with modern best practices
- A landing website to showcase the project
What's Included (v4.0.0)
Core Stack (Always Included)
✅ Expo SDK 57 with New Architecture always enabled
✅ React Native 0.86 with Fabric renderer
✅ TypeScript 6.0 with strict mode
✅ Expo Router for file-based routing with typed routes
✅ MMKV v4.3 for ultra-fast storage (Nitro Modules, ~30x faster)
✅ expo-haptics for native haptic feedback
✅ react-native-worklets for high-performance animations
Styling Options (Choose One)
✅ NativeWind v4.2 - Tailwind CSS v3.4 for React Native with dark mode
✅ Unistyles v3.3 - Type-safe styling with 3-theme system (light/dark/premium)
✅ Uniwind v1.10 - Tailwind CSS v4 with live theme switching (light/dark/premium)
Optional Modules
✅ TanStack Query v5 - Data fetching with MMKV persistence
✅ Zustand - State management with MMKV storage
✅ Expo Dev Client - Enhanced debugging
✅ Jest - Unit testing
Pre-configured
✅ Theme System - Persistent themes with MMKV
✅ ESLint + Prettier - Code quality tools
✅ Absolute Imports - @/ prefix for clean imports
✅ Turborepo - Monorepo management
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 · 1,131 lines · 7,730 tokens per session scan C 99d26e7dac65
fast-expo-app AGENTS.md is an instructions file published in the GitHub repository Teczer/fast-expo-app (105 stars, last pushed 2mo ago), licensed MIT. It adds 7,730 tokens to every session, about $0.0309 per session on Opus 5.5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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