Microsoft PowerToys 0.103.3099 dev preview adds Adaptive Cards charts, Fluent theming

Microsoft has published PowerToys development preview v0.103.3099.0, a pre-release build advancing the open-source Windows utility collection toward its next stable version. The update concentrates on Command Palette enhancements, File Explorer thumbnail reliability, and cleanup of legacy components. Command Palette extensions can now supply Adaptive Cards that render native line charts and compact sparklines, while those cards automatically respect Fluent light, dark, accent-color, and high-contrast themes. The release also finalizes removal of the discontinued Video Conference Mute utility by stripping its MSIX startup checks, installer artifacts, and ADMX policy templates.

Additional changes include isolated concurrent SVG requests and preserved UTF-8 STL filename handling in File Explorer, improved update compatibility with publisher-based application allowlists through signed Windows Runtime metadata, and localization fixes for Keyboard Manager's new editor. Mouse Without Borders pairing failures in signed builds are resolved, and Settings now preserves Color Picker format selections and device ordering during collection reordering. The build restores optional diagnostic event reporting without altering user preferences and adds test infrastructure for driver-backed PowerDisplay UI scenarios.

What changes in PowerToys 0.103.3099

• Command Palette / Adaptive Cards: Extension-supplied cards now support native line charts and compact sparklines with accessible, theme-aware rendering, expanding the visual capabilities of third-party palette extensions beyond static content.
• Command Palette / Theming: Adaptive Cards styling now follows Fluent light, dark, accent-color, and high-contrast settings, ensuring visual consistency with system-wide Windows personalization choices.
• Command Palette / Provider isolation: Fallback identity, global-result preferences, and ranking are now maintained separately per provider, preventing configuration collisions between different extension sources while preserving existing user rankings.
• File Explorer / Thumbnail robustness: Stalled thumbnail renderers are handled more gracefully, concurrent SVG requests are isolated to prevent cross-request interference, and supported SVG formatting plus UTF-8 STL names are preserved during processing.
• Installer / Enterprise compatibility: Update compatibility with publisher-based application allowlists is improved by signing and validating Windows Runtime metadata in both the installer and Command Palette package, addressing deployment friction in managed environments.

Why it matters

PowerToys remains one of Microsoft's highest-visibility open-source Windows projects, and its Command Palette extensibility model offers a reference for cross-platform launcher architectures like ULauncher and Albert on Linux. The Fluent-themed Adaptive Cards implementation and chart-rendering capabilities may influence expectations for adaptive UI components in open-source desktop environments. For developers tracking Microsoft's open-source engineering practices, the continued refinement of telemetry transparency and the clean retirement of Video Conference Mute demonstrate maintainable deprecation patterns applicable to long-running FOSS utilities.