Package Selection and Assemblies

Package map

Package	Assembly	Primary concern
`PrintingTools`	`PrintingTools`	Avalonia startup integration
`PrintingTools.Core`	`PrintingTools.Core`	Sessions, options, tickets, pagination, preview, diagnostics
`PrintingTools.UI`	`PrintingTools.UI`	Avalonia page setup and preview controls
`PrintingTools.Windows`	`PrintingTools.Windows`	Win32 adapter and rendering helpers
`PrintingTools.MacOS`	`PrintingTools.MacOS`	AppKit adapter, preview host, native bridge interop
`PrintingTools.Linux`	`PrintingTools.Linux`	CUPS and GTK-backed Linux adapter

Scenario	Package set
Standard Avalonia desktop app	`PrintingTools`
Desktop app with packaged preview UI	`PrintingTools` + `PrintingTools.UI`
Headless export or integration tests	`PrintingTools.Core` + one platform package
Platform-specific troubleshooting	The platform package alone, plus `PrintingTools.Core` transitively