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 AndrewDongminYoo/rn-agents-kit --skill rn-device-capturegit clone --depth 1 https://github.com/AndrewDongminYoo/rn-agents-kitWrote 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/andrewdongminyoo/rn-agents-kit/rn-device-capture)<a href="https://agentmods.dev/skills/andrewdongminyoo/rn-agents-kit/rn-device-capture"><img src="https://agentmods.dev/badge/skills/andrewdongminyoo/rn-agents-kit/rn-device-capture/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/andrewdongminyoo/rn-agents-kit/rn-device-capture"><img src="https://agentmods.dev/badge/skills/andrewdongminyoo/rn-agents-kit/rn-device-capture.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 | $0.00067 | $0.01790 |
| Opus 5 | $0.00034 | $0.00895 |
| Sonnet 5 | $0.00013 | $0.00358 |
| Haiku 4.5 | $0.00007 | $0.00179 |
Grade B, and why
rn-device-capture scanned grade B 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.
Asks for rootmediumPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
sudo pymobiledevice3 remote tunneld How it starts
The opening of the file, as written. The whole thing — 127 lines — stays where its author put it; the contents beside it link to each section on GitHub.
RN Device Capture — Screenshot the Running App for the Agent
Overview
Runs the bundled device-shot.sh to capture the screen of a connected target — Android device/emulator, booted iOS simulator, or iOS 17+ physical device — to a path under logs/ (default logs/screenshot.png) that the agent can immediately Read.
The helper prints the saved path to stdout, and never overwrites an existing default capture — always read the printed path.
This closes the visual feedback loop: the agent cannot watch the app, but it can read the screenshot and reason about whether a change rendered as intended.
It is read-only with respect to your source — the only thing written is the screenshot artifact.
When to Use
- "show me the screen", "screenshot the simulator/emulator", "what does the app look like now?"
- "did this screen render correctly?", "is the new layout right?" after a change or reload
- Capturing an iOS 17+ physical device screen, where there is no obvious official CLI path
Prerequisites / Setup
-
A booted target: an Android device/emulator (
adb), a booted iOS simulator (Xcodesimctl), or an iOS 17+ device. -
Tools are detected at runtime; only the target you use needs its tool installed.
-
iOS 17+ physical device only: capture goes through a RemoteXPC tunnel. Install
pymobiledevice3(e.g.pipx install pymobiledevice3) and, in a separate terminal left open, run:sudo pymobiledevice3 remote tunneldthen capture. Simulator and Android need no tunnel.
Quick Steps (read-only on source)
1 — Locate the helper
device-shot.sh ships inside this skill's own directory, not in the user's project.
After install (marketplace plugin or a project .claude/skills/), the user's working directory is their React Native app — a project-relative path like skills/rn-device-capture/device-shot.sh will not exist there.
When this skill is active you are given its absolute base directory; resolve the helper from that path.
Set SKILL_DIR to it once:
What ships with it
2 files 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 · 127 lines · 67 tokens per session scan B dc4984eba0f8
rn-device-capture is a skill published in the GitHub repository AndrewDongminYoo/rn-agents-kit (2 stars, last pushed 5d ago), licensed Apache-2.0. It adds 67 tokens to every session and 1,790 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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