Android Studio Quail 4 is now a stable release, offering enhanced AI capabilities for app development. The IDE now bundles curated "Android skills" for AI models, ensuring accurate and up-to-date code assistance for Android-specific tasks. These skills guide large language models through complex workflows, leveraging Google's best practices. Twenty-three pre-loaded skills cover areas like build upgrades, profiling, and UI adaptation. Developers can also create custom skills for specialized team workflows or use them with external command-line tools. Android Studio Quail 4 also integrates Gemma 4, Google's powerful open model, for private, secure, and offline AI coding assistance. This integration requires significant RAM but allows for multi-file refactoring without code leaving the local machine or hitting token limits. User interface enhancements in Quail 4 improve AI interactions with hyperlinked code symbols and real-time notifications for parallel agent tasks. A unified Summary of Changes tab consolidates multi-step task outcomes for easier review. For more advanced AI usage, developers can upgrade their Gemini access through API keys, Google AI plans, or Gemini Enterprise. The Quail series has progressively introduced features like App Quality Insights integration, agentic multitasking, local model support, and simplified planning modes. Android Studio Quail 4 provides users with a more efficient and intelligent development experience, encouraging users to download and provide feedback.