Mobile Dev by spencermarx
Expert agent for React Native mobile application development across iOS and Android
- Type
- Subagent
- Repository
- spencermarx/open-code-review
- GitHub stars
- 369
- License
- Apache-2.0
- Repo last updated
- Jul 28, 2026
- Version
- 1.0.0
- Author
- Claude Code
What Mobile Dev by spencermarx is
Mobile Dev by spencermarx is a subagent published in the spencermarx/open-code-review repository on GitHub, which has about 369 stars. The repository describes itself as: “AI-powered multi-agent code review. Simulates a customizable team of Engineers performing code review with built-in discourse.”
A subagent is a specialist assistant that Claude can hand part of a task to. It is a markdown file whose frontmatter sets a name, a description that tells Claude when to delegate, and optionally the tools and model it may use; the body becomes the subagent's own system prompt.
Because a subagent works in its own context, it keeps the main conversation focused: Claude can send a narrow job, such as a review or a specialised analysis, to Mobile Dev and get back a compact result.
How to install Mobile Dev by spencermarx
Claude Code
- Download spec-mobile-react-native.md from the repository.
- Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control.
- Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.
Claude Cowork
- Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent.
- Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.
New to extending Cowork? Our plugins guide and Customize guide explain how skills, plugins, and connectors fit together.
Inside the source file
An excerpt from .claude/agents/specialized/mobile/spec-mobile-react-native.md, shared under the repository's Apache-2.0 license. Read the full file on GitHub.
You are a React Native Mobile Developer creating cross-platform mobile applications.
Key responsibilities:
- Develop React Native components and screens
- Implement navigation and state management
- Handle platform-specific code and styling
- Integrate native modules when needed
- Optimize performance and memory usage
Best practices:
- Use functional components with hooks
- Implement proper navigation (React Navigation)
- Handle platform differences appropriately
- Optimize images and assets
- Test on both iOS and Android
- Use proper styling patterns
Component patterns:
import React, { useState, useEffect } from 'react';
import {
View,
Text,
StyleSheet,
Platform,
TouchableOpacity
} from 'react-native';
const MyComponent = ({ navigation }) => {
const [data, setData] = useState(null);
useEffect(() => {
// Component logic
}, []);
return (
<View style={styles.container}>
…Platform-specific considerations:
- iOS: Safe areas, navigation patterns, permissions
- Android: Back button handling, material design
- Performance: FlatList for long lists, image optimization
- State: Context API or Redux for complex apps
Before you install
- Read the whole file first. Skills, commands, and subagents are instructions Claude will follow, so make sure they match what you want.
- Check which tools, scripts, or MCP servers it uses. Local servers and scripts run with your permissions.
- Try it in a test project or a copy of your files before pointing it at real work.
- Pin the version you tested, and review changes before updating.
- Watch for instructions that fetch web content or run shell commands; those are where prompt injection risks start. See our prompt injection guide.
FAQ
What is Mobile Dev by spencermarx?
Mobile Dev by spencermarx is a subagent for Claude Code and Claude Cowork from the spencermarx/open-code-review repository on GitHub. Expert agent for React Native mobile application development across iOS and Android
How do I install Mobile Dev by spencermarx in Claude Code?
Download spec-mobile-react-native.md from the repository. Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control. Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.
Can I use Mobile Dev by spencermarx in Claude Cowork?
Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent. Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.
Is Mobile Dev by spencermarx safe to install?
It is a third-party community resource, not reviewed by Anthropic or this site. Read the source file first, check which tools and connectors it uses, and install only from sources you trust.
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