Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/rahulkeerthi/expo-toolkitnpx agentmods add skills/rahulkeerthi/expo-toolkit/automating-screenshotsWrote 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/rahulkeerthi/expo-toolkit/automating-screenshots)<a href="https://agentmods.dev/skills/rahulkeerthi/expo-toolkit/automating-screenshots"><img src="https://agentmods.dev/badge/skills/rahulkeerthi/expo-toolkit/automating-screenshots/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/rahulkeerthi/expo-toolkit/automating-screenshots"><img src="https://agentmods.dev/badge/skills/rahulkeerthi/expo-toolkit/automating-screenshots.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 | $0.00039 | $0.03941 |
| Opus 5.5 | $0.00016 | $0.01576 |
| Sonnet 5.5 | $0.00008 | $0.00788 |
| Haiku 4.5 | $0.00004 | $0.00394 |
Grade B, and why
automating-screenshots 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 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.
Asks for rootmediumPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
sudo gem install fastlane -NV How it starts
The opening of the file, as written. The whole thing — 731 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Fastlane Screenshot Automation Reference
Plugin Tools
Before setting up screenshot automation, check your environment:
# List available simulators/emulators and check fastlane
cd /path/to/expo-toolkit && npm run list-devices
# Or with flags
node tools/list-devices.js --ios # iOS only
node tools/list-devices.js --android # Android only
node tools/list-devices.js --json # JSON output
This shows:
- Available iOS simulators with App Store screenshot sizes highlighted
- Available Android emulators
- Fastlane installation status
Tools Overview
Fastlane is a suite of tools for automating mobile app development workflows:
| Tool | Platform | Purpose |
|---|---|---|
snapshot |
iOS | Automated screenshots |
screengrab |
Android | Automated screenshots |
frameit |
Both | Add device frames to screenshots |
deliver |
iOS | Upload to App Store Connect |
supply |
Android | Upload to Play Console |
match |
iOS | Code signing management |
pilot |
iOS | TestFlight management |
Installation
Via Homebrew (Recommended)
brew install fastlane
Via RubyGems
sudo gem install fastlane -NV
Verify Installation
fastlane --version
Project Setup
Initialise Fastlane
# In your project root
fastlane init
This creates:
fastlane/Fastfile- Lane definitionsfastlane/Appfile- App configuration
Directory Structure
your-project/
├── ios/
│ └── fastlane/
│ ├── Fastfile
│ ├── Appfile
│ ├── Snapfile
│ └── screenshots/
├── android/
│ └── fastlane/
│ ├── Fastfile
│ ├── Appfile
│ ├── Screengrabfile
│ └── screenshots/
└── ...
iOS Screenshot Automation (Snapshot)
Initialise Snapshot
cd ios
fastlane snapshot init
Creates:
fastlane/Snapfile- Snapshot configurationfastlane/SnapshotHelper.swift- UI test helper
Snapfile Configuration
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 · 731 lines · 39 tokens per session scan B 5d9cb7472628
automating-screenshots is a skill published in the GitHub repository rahulkeerthi/expo-toolkit (5 stars, last pushed 5mo ago), licensed MIT. It adds 39 tokens to every session and 3,941 once invoked, about $0.0002 per session on Opus 5.5. 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.
automating-screenshots compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| automating-screenshotsrahulkeerthi/expo-toolkit | Skill | 5 | 5mo ago | MIT | B | 39 | Claude Code |
| flutter-setup-localizationflutter/agent-plugins | Skill | 3.2k | 2d ago | BSD-3-Clause | A | 52 | Claude Code |
| asc-localize-metadatarorkai/app-store-connect-cli-skills | Skill | 1.1k | yesterday | MIT | A | 60 | Claude Code |
| asc-metadata-syncrorkai/app-store-connect-cli-skills | Skill | 1.1k | yesterday | MIT | A | 47 | Claude Code |
| asc-in-app-eventsrorkai/app-store-connect-cli-skills | Skill | 1.1k | yesterday | MIT | A | 49 | Claude Code |
| maui-localization-themingdotnet/maui-labs | Skill | 235 | yesterday | MIT | A | 73 | Claude Code, Codex |
| android-resourcesHoangNguyen0403/agent-skills-standard | Skill | 583 | yesterday | MIT | A | 59 | Claude Code, Codex |