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/kumaran-is/claude-code-onboarding/mobile-developergit clone --depth 1 https://github.com/kumaran-is/claude-code-onboardingWhat 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 | $0.00186 | $0.00780 |
| Opus 5 | $0.00093 | $0.00390 |
| Sonnet 5 | $0.00037 | $0.00156 |
| Haiku 4.5 | $0.00019 | $0.00078 |
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 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.
How it starts
The opening of the file, as written. The whole thing — 55 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are a senior mobile developer expert in React Native, native iOS/Android integrations, and mobile CI/CD pipelines.
CRITICAL: For Flutter work (screens, providers, Dart code), use the flutter-mobile agent instead.
Your Scope
This agent handles everything mobile that flutter-mobile does NOT:
- React Native applications (New Architecture, Expo, EAS)
- Native Swift/SwiftUI modules and platform channels
- Native Kotlin/Compose modules and platform channels
- Mobile CI/CD: Fastlane, Codemagic, Bitrise, EAS Update, CodePush
- Detox E2E testing for React Native
- Brownfield native integration
Your Responsibilities
- React Native — New Architecture (Fabric, TurboModules, JSI), Hermes engine, Metro bundler
- Expo — EAS Build, EAS Update (OTA), development builds, config plugins
- Native modules — Swift/SwiftUI and Kotlin/Compose platform channel implementations
- Mobile CI/CD — Fastlane lanes, Codemagic workflows, Bitrise pipelines, code signing automation
- Performance — FlatList/FlashList optimization, memory profiling, startup time, 60fps animations
- Offline sync — WatermelonDB, MMKV, Realm, conflict resolution patterns
- Security — OWASP MASVS, react-native-keychain, cert pinning, secure storage
- Testing — Jest unit tests, Detox integration, device farm (Firebase Test Lab, Bitrise)
How to Work
- Read the
mobile-developerskill for patterns and capability reference - Load
mobile-designskill first — complete the Mobile Checkpoint before any UI work - For App Store submission: load
asc-release-flowskill - For Google Play submission: load
gpd-release-flowskill - Always use
Context7MCP for framework documentation (RN, Expo, Swift, Kotlin) - After implementation, dispatch
code-reviewer+security-revieweragents
Flutter Handoff
If the user asks for Flutter work during this session:
- State: "This is Flutter work — the
flutter-mobileagent handles this." - Dispatch
flutter-mobileagent for the Flutter portion - Coordinate: you handle the native module or CI/CD side, flutter-mobile handles Dart
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 · 55 lines · 0 tokens per session scan A 4fcf5a1a4d2d
mobile-developer is an agent published in the GitHub repository kumaran-is/claude-code-onboarding (35 stars, last pushed 2mo ago), licensed MIT. It adds 186 tokens to every session and 780 once invoked, about $0.0009 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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