ai-expo-starter-template: Instructions file for Codex

AGENTS.md

ai-expo-starter-template AGENTS.md is an instructions file for Codex, OpenCode from maccman/ai-expo-starter-template. It costs 2,116 tokens per session, scanned A, original, MIT.

A set of instructions for working on an Expo and React Native starter app, including its development cycle, technologies, and project notes.

In plain words
What is it for?
Use it when editing the starter app, installing dependencies, fixing TypeScript issues, and running its combined type-check, test, formatting, and lint checks.
Why use it?
It tells coding agents how this app is organised and which checks to run after making changes.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md.

This is maccman/ai-expo-starter-template's own configuration. It tells Codex and OpenCode how to work on ai-expo-starter-template 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 ai-expo-starter-template configures →

Reuse

Borrowing it

Nothing to install: this file belongs to maccman/ai-expo-starter-template. 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/maccman/ai-expo-starter-template/master/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/maccman/ai-expo-starter-template

Made for: Codex, OpenCode.

Wrote this? Show the measurements

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Per session 2,116 This file is loaded in full into every session.
When invoked 2,116 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.02116 $0.02116
Opus 5 $0.01058 $0.01058
Sonnet 5 $0.00423 $0.00423
Haiku 4.5 $0.00212 $0.00212

Measured 9d ago against content hash 92880e2bab74, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

ai-expo-starter-template 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 9d 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 · 310 lines

How it starts

The opening of the file, as written. The whole thing — 310 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent Rules

Generated from .cursor/rules

always.mdc


description: globs: alwaysApply: true


Development cycle

  1. Run pnpm install (you have full internet access)
  2. Make your code edits and changes
  3. Finally run pnpm ai:check (this will run typecheck, test, fix, and lint)

Notes

  • If there are any Typescript linting errors, run pnpm fix before attempting to fix the errors yourself.
  • Never try to start a dev server - prompt the user to do this.

app-description.mdc


alwaysApply: true

Project Context

TODO. This is where you describe your project. It's important you update it. For now, suffice to say this project is a Expo and React Native starter template.

Key Features

  • Expo and React Native starter template
  • Glassmorphism UI

app-technologies.mdc


alwaysApply: true

Technologies used

Frontend

  • iOS/Android - Expo (React Native + TypeScript)
  • Navigation - React Navigation
  • Maps - react-native-maps (Google provider)
  • Native modules - Google Maps SDK, Google Places SDK, fast image caching

Backend

  • BFF (Backend for Frontend) - Edge proxy for Places API
  • Database - Postgres (users, friendships, user_places, scores, imports)
  • APIs - Google Maps SDK for iOS + Places API

Development

  • Testing - Vitest
  • Code Quality - ESLint + Prettier
  • Package Management - pnpm

Code Conventions

When writing or modifying code in this project, please adhere to the following conventions:

  1. TypeScript Best Practices: Follow standard, idiomatic TypeScript coding practices for structure, naming, and types, unless otherwise overridden.
  2. Minimal Comments: Avoid adding comments unless they explain complex logic or non-obvious decisions. Well-written, self-explanatory code is preferred. Do not add comments that merely restate what the code does.
  3. Tests as Documentation: Rely on comprehensive tests (which will be added later if not present) to document the behavior and usage of the code, rather than extensive comments within the code itself.
  4. File naming conventions: Use kebab-case when naming directories, TypeScript, and other files.
  5. Type checking: after major modifications run pnpm typecheck and fix any errors.
  6. Open-source conventions Pretend you are writing code for a open-source project. Write best-in-class code.

Read the full file on GitHub · 310 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. 9d ago First seen · 310 lines · 2,116 tokens per session scan A 92880e2bab74

Subscribe to this mod's changes

ai-expo-starter-template AGENTS.md is an instructions file published in the GitHub repository maccman/ai-expo-starter-template (4 stars, last pushed 11mo ago), licensed MIT. It adds 2,116 tokens to every session, about $0.0106 per session on Opus 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.

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