Android Security Skill

A comprehensive security knowledge base for AI-assisted Android application development, based exclusively on official Android documentation from Android Open Source Project (AOSP) and Android Developers. Compatible with Claude Code, Android Studio, and other AI development tools.

Overview

This skill provides authoritative Android security best practices, code examples, and guidelines to help developers build secure Android applications with AI assistance.

Target Audience

This skill is designed for third-party Android application developers building apps for the Google Play Store and other distribution channels. The content focuses on:

• App-level security - Securing your application code, data, and user interactions
• Android SDK APIs - Using public Android framework APIs available to all developers
• Best practices - Following Google's recommended security patterns for production apps

Not primarily intended for:

• Platform/AOSP developers working on the Android operating system itself
• System app developers requiring platform signing certificates
• Low-level framework modifications or custom ROM development

Some advanced topics (clearly marked as such) cover system-level APIs for completeness, but the core focus is on practical security for third-party app development.

Skill Structure

android-security-skill/
├── SKILL.md                              # Main entry point with overview
├── README.md                             # This file
└── reference/
    ├── communication-security.md         # Network and IPC security
    ├── data-storage.md                   # Secure data storage
    ├── authentication.md                 # Auth and credentials
    ├── permissions.md                    # Permission best practices
    ├── cryptography.md                   # Crypto implementations
    ├── components.md                     # Android components security
    └── ai.md                             # AI/LLM security risks

Topics Covered

• Communication Security
• Data Storage
• Authentication & Credentials
• Permissions
• Cryptography
• Android Components
• AI Security Risks

Quick Start

For Android Studio

Note: Only skills located within the project's codebase are supported.

1. Download or clone this skill to your local machine

2. Import into your Android Studio project by copying the skill directory to your project root in one of these locations:

   your-project/
   ├── .skills/
   │   └── android-security-skill/
   │       └── SKILL.md
   

   Or:

   your-project/
   ├── .agent/skills/
   │   └── android-security-skill/
   │       └── SKILL.md
   

3. Use the skill:

   Automatic Activation The agent automatically activates relevant skills based on your task. Simply prompt the agent with a related request:

   • "How do I securely store API keys in Android?"
   • "Review this code for security vulnerabilities"
   • "Help me implement biometric authentication"

   Manual Invocation Type @android-security-skill directly in the chat window to invoke the skill manually.

For Claude Code

1. Copy this skill directory to one of these locations:

   • Personal: ~/.claude/skills/android-security-skill/
   • Project: .claude/skills/android-security-skill/

2. Use the skill by asking Claude about Android security:

   • "How do I securely store API keys in Android?"
   • "What are the best practices for Android network security?"
   • "Help me implement biometric authentication"
   • "Review this code for security vulnerabilities"

3. Invoke directly with /android-security-skill followed by your question

General Usage Tips

• Reference specific files for focused help: "Based on data-storage.md, how should I..."
• Request code reviews: "Review this code against Android security best practices"
• Ask for implementation guidance: "Help me implement [feature] securely"
• Verify approaches: "Is this implementation secure according to Android guidelines?"

Key Features

✅ Based on Official Documentation

• Android Open Source Project (AOSP)
• Android Developers (developer.android.com)
• Current as of April 2026

✅ Comprehensive Coverage

• App security best practices
• System security guidelines
• Code examples in Kotlin
• Security checklists

✅ Progressive Disclosure

• Quick reference in SKILL.md
• Detailed guidance in reference files
• Load only what you need

✅ Practical Code Examples

• Real-world implementations
• Security patterns
• Anti-patterns to avoid

Official Documentation Sources

Android Developers

• Security Best Practices
• Security Checklist
• Android Keystore
• Network Security Config
• Cryptography
• AI Risks and Mitigations

Android Open Source Project

• Security Best Practices
• App Security
• System Security
• Security Overview
• Security Bulletins

Version

Last Updated: April 2026

Based on:

• Android Security Best Practices (Updated March 30, 2026)
• Android Security Checklist (Updated March 6, 2026)
• Android AI Risks and Mitigations (Updated December 16, 2025)
• Android Open Source Project Security Documentation (2026)

License

MIT License - see LICENSE file for details.

This skill is based on official Android documentation, which is licensed under the Apache License 2.0.

Feedback

If you find outdated information or need additional Android security topics covered, please ensure requests are based on official Android documentation.