Uno Platform 6.5 Delivers AI Agent Integration, Unicode Support, and Enhanced Studio Experience

Uno Platform has released version 6.5, delivering a comprehensive update that bridges the gap between traditional cross-platform development and the emerging AI-driven development landscape. The February release addresses over 450 community and customer issues while introducing several headline features that position Uno Platform at the forefront of modern application development.

AI Agent Integration: Antigravity and Runtime Inspection

The most transformative addition in this release is Uno Platform's integration with Google's Antigravity, an agent-first development environment built on VS Code. This integration represents a significant leap forward in how developers can leverage AI agents during the development process.

Through the Uno Platform App MCP server, AI agents working inside Antigravity can now interact with running Uno applications at runtime. This capability goes far beyond traditional static code analysis, allowing agents to:

• Inspect the visual tree of running applications
• Take screenshots of the current UI state
• Simulate user input and interactions
• Verify real interface behavior in real-time

The results of these agent-driven inspections are saved as reviewable artifacts, providing developers with concrete records of what the AI agent discovered and tested. This approach transforms AI from a code suggestion tool into an active participant in the development and testing workflow.

Studio Enhancements: Hot Design Evolution

Uno's Studio tooling has received substantial improvements, particularly around the Hot Design feature—Uno's live visual design tool. The team has focused on reducing friction and improving the developer experience based on community feedback.

Key Studio improvements include:

• Automatic Launch: Hot Design now launches automatically when a new project is run for the first time, eliminating manual setup steps
• Guided Onboarding: A new introductory experience walks users through the three available modes: Agent, Design, and Interactive
• Toolbar Redesign: The floating toolbar has been replaced with a fixed toolbar anchored to the top of the screen, addressing community feedback about UI clutter
• Scope Selector: A new navigation tool allows developers to jump directly to any UserControl or template visible on the current screen, simplifying the editing of deeply nested interface structures

These changes reflect Uno Platform's commitment to listening to its community and continuously refining the development experience.

Unicode Text Support: Global Accessibility

Version 6.5 introduces comprehensive Unicode support to the TextBox control, marking a significant step toward truly global application development. Non-Latin scripts, including Arabic, Mandarin, and Hindi, now render with correct caret positioning, text selection, and keyboard navigation.

This enhancement addresses a critical need for developers building applications for international markets. However, the team notes that Input Method Editors (IME) for languages like Chinese, Japanese, and Korean are not yet supported in this release, indicating room for future improvement.

The addition of Unicode support demonstrates Uno Platform's recognition that modern applications must serve diverse global audiences without compromising on text rendering quality or user experience.

WebAssembly and Cross-Platform Stability

WebView2 on WebAssembly has received significant improvements, with more reliable loading of locally bundled web assets. This enhancement is crucial for developers building web-based applications that need to integrate web content seamlessly.

Drag-and-drop functionality on WebAssembly using the Skia renderer has been expanded to support file drops from external applications, opening new possibilities for web-based file handling scenarios.

The release includes broader stability improvements across all supported targets, including WebAssembly, iOS, Android, macOS, Windows, and Linux. Specific controls that received fixes include TextBox, ListView, ProgressRing, PasswordBox, and MenuFlyout, among others.

Performance and Reliability Focus

Beyond the headline features, Uno Platform 6.5 includes numerous under-the-hood improvements:

• Skia rendering improvements for better visual fidelity
• Enhanced error diagnostics for easier debugging
• App startup and navigation reliability fixes
• Further WebView stability across platforms

These refinements demonstrate Uno Platform's commitment to not just adding features, but ensuring the entire development and runtime experience is robust and reliable.

The Bigger Picture: AI-Enhanced Cross-Platform Development

Uno Platform 6.5 represents a significant milestone in the evolution of cross-platform development tools. By integrating AI agent capabilities directly into the development workflow, Uno is positioning itself at the intersection of traditional .NET development and the emerging AI-driven development paradigm.

The runtime inspection capabilities enabled by the Antigravity integration could fundamentally change how developers approach UI testing and validation. Instead of relying solely on manual testing or automated test scripts, developers can now leverage AI agents to explore application behavior dynamically and provide actionable insights.

This approach aligns with broader industry trends toward AI-assisted development while maintaining Uno Platform's focus on the .NET ecosystem and cross-platform compatibility.

Looking Forward

The Uno Platform team has demonstrated its ability to respond to community needs while pushing the boundaries of what's possible in cross-platform development. The combination of AI integration, Unicode support, and Studio enhancements in version 6.5 sets a high bar for future releases.

For developers working in the .NET ecosystem who need to target multiple platforms, Uno Platform 6.5 offers compelling new capabilities that can streamline development workflows and improve application quality. The runtime AI inspection features, in particular, represent a novel approach to application testing and validation that could become increasingly important as applications grow in complexity.

Interested developers can explore the full details in the official Uno Platform blog post, which provides comprehensive release notes and implementation details.

The release of Uno Platform 6.5 signals that the future of cross-platform development is not just about targeting multiple platforms, but about leveraging AI to create more robust, globally accessible applications with improved developer experiences.