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 agentmods add skills/callstack/agent-device/android-emulatornpx skills add callstack/agent-device --skill android-emulatorgit clone --depth 1 https://github.com/callstack/agent-deviceWhat 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 | $0.00065 | $0.00346 |
| Opus 5 | $0.00032 | $0.00173 |
| Sonnet 5 | $0.00013 | $0.00069 |
| Haiku 4.5 | $0.00006 | $0.00035 |
Grade A, and why
android-emulator 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 2d 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.
What it actually says
Android Emulator
Require the agent-device CLI to be installed separately before driving an emulator:
npm install -g agent-device@latest
Treat installation and upgrades as user-owned setup steps. Do not run that command autonomously or substitute a mutable npx -y agent-device@latest invocation.
For a normal app-driving task, start immediately. Do not probe first with --help, --version, devices, appstate, snapshot, or screenshot. Target Android explicitly when opening an app or package id:
agent-device open <app-or-package-id> --platform android --foreground
Follow the initial interactive snapshot and corrective error hints. If the shell reports that agent-device is unavailable, stop and ask the user to install it or expose their existing installation on PATH.
Only when the task is specialized or a command shape is unclear, read the relevant version-matched help topic:
agent-device help validate # engineering validation and build freshness
agent-device help debugging # screenshots, logs, traces, video, and failures
agent-device help react-native # React Native and Expo runtime guidance
agent-device help react-devtools # component tree, props/state/hooks, and renders
agent-device help scripting # durable replay and CI workflows
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.
- 2d ago First seen · 33 lines · 65 tokens per session scan A eab18adf3b0b
android-emulator is a skill published in the GitHub repository callstack/agent-device (4,300 stars, last pushed yesterday), licensed MIT. It adds 65 tokens to every session and 346 once invoked, about $0.0003 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 2026-08-30.
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