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docs/archive/RUNTIME_PACKAGING.md

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+# Runtime Packaging
+
+## Windows
+
+- Windows installers do not bundle the .NET shared runtime.
+- `LanMountainDesktop.Launcher.exe` is the package-root bootstrapper and remains Native AOT/self-contained.
+- `LanMountainDesktop.AirAppRuntime.exe` is a package-root framework-dependent JIT process. Launcher pre-starts it, and Host can start it as a direct-run fallback.
+- `LanMountainDesktop.exe` and `LanMountainDesktop.AirAppHost.exe` are framework-dependent, RID-specific apps under `app-<version>/`.
+- Inno Setup downloads and silently installs the matching .NET 10 Desktop Runtime before continuing:
+  - x64 installer: `https://aka.ms/dotnet/10.0/windowsdesktop-runtime-win-x64.exe`
+  - x86 installer: `https://aka.ms/dotnet/10.0/windowsdesktop-runtime-win-x86.exe`
+- Launcher runtime probing validates the architecture-matched `Microsoft.NETCore.App 10.*` shared framework before starting framework-dependent processes.
+
+If the launcher returns `dotnet_runtime_missing`, verify the runtime architecture:
+
+```powershell
+dotnet --list-runtimes
+Test-Path "C:\Program Files\dotnet\shared\Microsoft.NETCore.App"
+Test-Path "C:\Program Files (x86)\dotnet\shared\Microsoft.NETCore.App"
+```