Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add fanfan-de/anybox --skill expo-examplesgit clone --depth 1 https://github.com/fanfan-de/anyboxWrote 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/skills/fanfan-de/anybox/expo-examples)<a href="https://agentmods.dev/skills/fanfan-de/anybox/expo-examples"><img src="https://agentmods.dev/badge/skills/fanfan-de/anybox/expo-examples/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/skills/fanfan-de/anybox/expo-examples"><img src="https://agentmods.dev/badge/skills/fanfan-de/anybox/expo-examples.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 | $0.00095 | $0.01493 |
| Opus 5 | $0.00048 | $0.00746 |
| Sonnet 5 | $0.00019 | $0.00299 |
| Haiku 4.5 | $0.00010 | $0.00149 |
Grade A, and why
expo-examples scanned grade A 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 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -s https://raw.githubusercontent.com/expo/examples/master/with-stripe/utils/stripe-server.ts This is a copy
89% identical to expo-examples — 17 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 98 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Expo Examples
expo/examples is Expo's official library of ~70 integration examples — directories named with-<library> (e.g. with-stripe, with-maps), each built around one library or service. These are not full apps: they're managed projects (no ios//android/ dirs — native setup is via config plugins), and the typical one is a single screen of ~100–200 lines. Mine them for the canonical integration pattern — the dependency set, app.json config plugins, and minimal wiring Expo maintains against the current SDK — and adapt that into the user's app. Don't expect to lift an application architecture from them.
Reach for an example before hand-rolling an integration. (Kinds — full-stack, showcases, starters — are noted in ./references/catalog.md.)
Two modes
- Inspiration / adapt (most common) — the user already has a project. Find the matching example, read its key files, and apply the pattern to their code.
- Scaffold — greenfield. Start a fresh project directly from the example.
Workflow
1. Find the right example
Map the user's need to an example name (e.g. payments → with-stripe, auth → with-clerk). ./references/catalog.md is a categorized snapshot for fast triage — but it drifts, so confirm against the live list:
# Live example names:
gh api repos/expo/examples/contents --jq '.[] | select(.type=="dir" and (.name|startswith(".")|not)) | .name'
# Aliases (renamed) + deprecated (dead/moved) examples — check before recommending:
gh api repos/expo/examples/contents/meta.json --jq '.content' | base64 -d
meta.json is the source of truth for what's renamed or dead (deprecated examples are removed from the repo tree but still listed here, each with a message). If an example is in its deprecated map, don't recommend it — follow the message to the modern path. If it's in aliases, use the destination.
2a. Inspiration mode — study without touching the user's project
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 9d ago First seen · 98 lines · 95 tokens per session scan A 3758d0db0053
expo-examples is a skill published in the GitHub repository fanfan-de/anybox (57 stars, last pushed 1mo ago), licensed MIT. It adds 95 tokens to every session and 1,493 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). It is 89% identical to expo-examples, differing in 17 lines, and is treated as a copy.
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