feat(platform): Campaign LA LA0 — extract ApplicationPathSet to AcDream.Platform
The launcher (LA3/LA4) needs the XDG/Windows path contract (ApplicationPathSet/IApplicationPathEnvironment) without pulling in any gameplay assembly. Move it out of AcDream.Runtime into a new BCL-only AcDream.Platform project so the launcher-side Launcher.Core project can reference it directly per the campaign plan (docs/plans/2026-08-14-launcher-campaign.md, LA0). Namespace renamed AcDream.Runtime.Platform -> AcDream.Platform; code is otherwise byte-identical (no logic changes). AcDream.Runtime now carries a ProjectReference to AcDream.Platform and re-exports it transitively, so App and Headless keep resolving the type without a direct reference and K0's Headless single-ProjectReference guard (HeadlessAssemblyReferencesOnlyTheRuntimeProject) stands unchanged. The sibling Runtime dependency-boundary guard (RuntimeProjectDeclaresOnlyApprovedProjectDependencies) does assert Runtime's own project-reference set, so it needed a deliberate, documented addition of AcDream.Platform to its expected list. Moved tests/AcDream.Runtime.Tests/Platform/ApplicationPathSetTests.cs to a new tests/AcDream.Platform.Tests/ project (namespace AcDream.Platform.Tests) referencing only AcDream.Platform. Registered both new projects in AcDream.slnx. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Erik
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14 changed files with 49 additions and 10 deletions
22
tests/AcDream.Platform.Tests/AcDream.Platform.Tests.csproj
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22
tests/AcDream.Platform.Tests/AcDream.Platform.Tests.csproj
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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFramework>net10.0</TargetFramework>
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<ImplicitUsings>enable</ImplicitUsings>
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<Nullable>enable</Nullable>
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<IsPackable>false</IsPackable>
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<LangVersion>latest</LangVersion>
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<TreatWarningsAsErrors>true</TreatWarningsAsErrors>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="coverlet.collector" Version="6.0.4" />
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<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
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<PackageReference Include="xunit" Version="2.9.3" />
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<PackageReference Include="xunit.runner.visualstudio" Version="3.1.4" />
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</ItemGroup>
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<ItemGroup>
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<Using Include="Xunit" />
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</ItemGroup>
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<ItemGroup>
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<ProjectReference Include="..\..\src\AcDream.Platform\AcDream.Platform.csproj" />
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</ItemGroup>
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</Project>
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162
tests/AcDream.Platform.Tests/ApplicationPathSetTests.cs
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tests/AcDream.Platform.Tests/ApplicationPathSetTests.cs
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using AcDream.Platform;
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namespace AcDream.Platform.Tests;
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public sealed class ApplicationPathSetTests
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{
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[Fact]
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public void LinuxUsesXdgRootsAndPublishesFeaturePaths()
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{
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string root = Path.GetFullPath(
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Path.Combine(Path.GetTempPath(), "acdream-runtime-xdg"));
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var platform = new FixtureEnvironment(isWindows: false)
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{
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CurrentDirectoryValue = Path.Combine(root, "work"),
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UserProfile = Path.Combine(root, "home"),
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Variables =
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{
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["XDG_CONFIG_HOME"] = Path.Combine(root, "cfg"),
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["XDG_DATA_HOME"] = Path.Combine(root, "data"),
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["XDG_CACHE_HOME"] = Path.Combine(root, "cache"),
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},
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};
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ApplicationPathSet paths = ApplicationPathSet.Resolve(
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platform: platform);
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Assert.Equal(
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Path.Combine(root, "cfg", "acdream"),
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paths.ConfigDirectory);
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Assert.Equal(
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Path.Combine(root, "data", "acdream"),
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paths.DataDirectory);
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Assert.Equal(
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Path.Combine(root, "cache", "acdream"),
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paths.CacheDirectory);
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Assert.Equal(
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Path.Combine(paths.ConfigDirectory, "settings.json"),
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paths.SettingsFile);
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Assert.Equal(
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Path.Combine(paths.ConfigDirectory, "keybinds.json"),
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paths.KeyBindingsFile);
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Assert.Equal(
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Path.Combine(paths.DataDirectory, "plugins"),
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paths.PluginsDirectory);
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Assert.Equal(
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Path.Combine(paths.CacheDirectory, "diagnostics"),
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paths.DiagnosticsDirectory);
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Assert.Null(paths.LegacyConfigDirectory);
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}
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[Fact]
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public void LinuxFallsBackToHomeAndNormalizesOverrides()
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{
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string root = Path.GetFullPath(
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Path.Combine(Path.GetTempPath(), "acdream runtime paths"));
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var platform = new FixtureEnvironment(isWindows: false)
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{
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CurrentDirectoryValue = Path.Combine(root, "work"),
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UserProfile = Path.Combine(root, "home"),
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};
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ApplicationPathSet paths = ApplicationPathSet.Resolve(
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"relative config",
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"dåta",
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"cache",
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platform);
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Assert.Equal(
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Path.GetFullPath(
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"relative config",
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platform.CurrentDirectoryValue),
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paths.ConfigDirectory);
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Assert.Equal(
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Path.GetFullPath("dåta", platform.CurrentDirectoryValue),
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paths.DataDirectory);
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Assert.Equal(
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Path.GetFullPath("cache", platform.CurrentDirectoryValue),
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paths.CacheDirectory);
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}
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[Fact]
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public void WindowsUsesRoamingConfigAndLocalData()
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{
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string root = Path.GetFullPath(
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Path.Combine(Path.GetTempPath(), "acdream-runtime-windows"));
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var platform = new FixtureEnvironment(isWindows: true)
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{
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CurrentDirectoryValue = Path.Combine(root, "work"),
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ApplicationData = Path.Combine(root, "AppData", "Roaming"),
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LocalApplicationData =
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Path.Combine(root, "AppData", "Local"),
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};
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ApplicationPathSet paths = ApplicationPathSet.Resolve(
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platform: platform);
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Assert.Equal(
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Path.Combine(
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platform.ApplicationData,
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"acdream"),
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paths.ConfigDirectory);
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Assert.Equal(
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Path.Combine(
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platform.LocalApplicationData,
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"acdream"),
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paths.DataDirectory);
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Assert.Equal(
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Path.Combine(
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platform.LocalApplicationData,
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"acdream",
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"cache"),
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paths.CacheDirectory);
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Assert.Equal(
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Path.Combine(
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platform.LocalApplicationData,
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"acdream"),
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paths.LegacyConfigDirectory);
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}
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private sealed class FixtureEnvironment(bool isWindows)
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: IApplicationPathEnvironment
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{
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public bool IsWindows { get; } = isWindows;
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public string CurrentDirectoryValue { get; init; } =
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Environment.CurrentDirectory;
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public string CurrentDirectory => CurrentDirectoryValue;
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public string UserProfile { get; init; } =
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Environment.GetFolderPath(
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Environment.SpecialFolder.UserProfile);
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public string ApplicationData { get; init; } =
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Environment.GetFolderPath(
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Environment.SpecialFolder.ApplicationData);
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public string LocalApplicationData { get; init; } =
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Environment.GetFolderPath(
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Environment.SpecialFolder.LocalApplicationData);
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public Dictionary<string, string> Variables { get; } =
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new(StringComparer.Ordinal);
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public string? GetEnvironmentVariable(string name) =>
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Variables.TryGetValue(name, out string? value)
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? value
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: null;
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public string GetFolderPath(
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Environment.SpecialFolder folder) =>
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folder switch
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{
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Environment.SpecialFolder.UserProfile => UserProfile,
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Environment.SpecialFolder.ApplicationData =>
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ApplicationData,
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Environment.SpecialFolder.LocalApplicationData =>
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LocalApplicationData,
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_ => string.Empty,
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};
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}
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}
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