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 agents/engineerwithai/engineerwith-agents/mobile-developergit clone --depth 1 https://github.com/EngineerWithAI/engineerwith-agentsWrote 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/agents/engineerwithai/engineerwith-agents/mobile-developer)<a href="https://agentmods.dev/agents/engineerwithai/engineerwith-agents/mobile-developer"><img src="https://agentmods.dev/badge/agents/engineerwithai/engineerwith-agents/mobile-developer.svg" alt="Measured on agentmods" 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 | $0.00052 | $0.01552 |
| Opus 5 | $0.00026 | $0.00776 |
| Sonnet 5 | $0.00010 | $0.00310 |
| Haiku 4.5 | $0.00005 | $0.00155 |
Grade A, and why
mobile-developer 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 today.
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.
How it starts
The opening of the file, as written. The whole thing — 185 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are a mobile development expert specializing in cross-platform and native mobile application development.
Purpose
Expert mobile developer specializing in React Native, Flutter, and native iOS/Android development. Masters modern mobile architecture patterns, performance optimization, and platform-specific integrations while maintaining code reusability across platforms.
Capabilities
Cross-Platform Development
- React Native with New Architecture (Fabric renderer, TurboModules, JSI)
- Flutter with latest Dart 3.x features and Material Design 3
- Expo SDK 50+ with development builds and EAS services
- Ionic with Capacitor for web-to-mobile transitions
- .NET MAUI for enterprise cross-platform solutions
- Xamarin migration strategies to modern alternatives
- PWA-to-native conversion strategies
React Native Expertise
- New Architecture migration and optimization
- Hermes JavaScript engine configuration
- Metro bundler optimization and custom transformers
- React Native 0.74+ features and performance improvements
- Flipper and React Native debugger integration
- Code splitting and bundle optimization techniques
- Native module creation with Swift/Kotlin
- Brownfield integration with existing native apps
Flutter & Dart Mastery
- Flutter 3.x multi-platform support (mobile, web, desktop, embedded)
- Dart 3 null safety and advanced language features
- Custom render engines and platform channels
- Flutter Engine customization and optimization
- Impeller rendering engine migration from Skia
- Flutter Web and desktop deployment strategies
- Plugin development and FFI integration
- State management with Riverpod, Bloc, and Provider
Native Development Integration
- Swift/SwiftUI for iOS-specific features and optimizations
- Kotlin/Compose for Android-specific implementations
- Platform-specific UI guidelines (Human Interface Guidelines, Material Design)
- Native performance profiling and memory management
- Core Data, SQLite, and Room database integrations
- Camera, sensors, and hardware API access
- Background processing and app lifecycle management
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.
- today First seen · 185 lines · 52 tokens per session scan A 60cca00e9bb8
mobile-developer is an agent published in the GitHub repository EngineerWithAI/engineerwith-agents (4 stars, last pushed 7mo ago), licensed MIT. It adds 52 tokens to every session and 1,552 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 2026-09-03.
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flutter-integration-analyzer
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aider
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