diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0fda3b7..ebe3cd5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- Added unit tests for `GitHubModSource.ListPlugins` to increase coverage for deterministic behavior.
 - **JSON Source Generation (AOT Support)**: Centralized registry in `AppJsonContext.cs` for all serialized models (`AuthResponse`, `DebugLogPayload`, `RalphTaskStatus`, `AssetModMetadata`, etc.) to ensure stability in trimmed builds.
 - `global.json`: Pinned .NET SDK to 9.0.313 for build reproducibility and to bypass broken preview SDKs.
 - `DESIGN.md` documenting the **Terminal Core** design system (colors, typography, layout grid, component specs, forbidden patterns).
diff --git a/build/scripts/linux/build-avalonia-packages.sh b/build/scripts/linux/build-avalonia-packages.sh
index 6a35814..8a3b868 100644
--- a/build/scripts/linux/build-avalonia-packages.sh
+++ b/build/scripts/linux/build-avalonia-packages.sh
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
+REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/../../.." && pwd)"
 PROJECT_PATH="$REPO_ROOT/src/GregModmanager.Avalonia/GregModmanager.Avalonia.csproj"
 OUTPUT_ROOT="${1:-$REPO_ROOT/artifacts/avalonia-linux}"
 VERSION="${2:-1.1.0}"
diff --git a/src/GregModmanager.Avalonia/App.axaml.cs b/src/GregModmanager.Avalonia/App.axaml.cs
index 08ae8af..617c088 100644
--- a/src/GregModmanager.Avalonia/App.axaml.cs
+++ b/src/GregModmanager.Avalonia/App.axaml.cs
@@ -21,13 +21,12 @@ public override void OnFrameworkInitializationCompleted()
         
         var telemetry = Services.GetRequiredService<TelemetryService>();
         _ = telemetry.ReportCrashesAsync();
-        _ = telemetry.TrackEventAsync("startup", new 
-        {
-            steamActive = GregModmanager.Steam.SteamApiNativeLoader.IsLoaded,
-            culture = System.Globalization.CultureInfo.CurrentCulture.Name,
-            osDescription = System.Runtime.InteropServices.RuntimeInformation.OSDescription,
-            dotNetVersion = System.Runtime.InteropServices.RuntimeInformation.FrameworkDescription
-        });
+        _ = telemetry.TrackEventAsync("startup", new GregModmanager.Models.StartupEvent(
+            GregModmanager.Steam.SteamApiNativeLoader.IsLoaded,
+            System.Globalization.CultureInfo.CurrentCulture.Name,
+            System.Runtime.InteropServices.RuntimeInformation.OSDescription,
+            System.Runtime.InteropServices.RuntimeInformation.FrameworkDescription
+        ));
 
         if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
         {
diff --git a/src/GregModmanager.Core/Models/AppJsonContext.cs b/src/GregModmanager.Core/Models/AppJsonContext.cs
index d7fe96d..6bd64ad 100644
--- a/src/GregModmanager.Core/Models/AppJsonContext.cs
+++ b/src/GregModmanager.Core/Models/AppJsonContext.cs
@@ -34,6 +34,7 @@ namespace GregModmanager.Models;
 [JsonSerializable(typeof(int))]
 [JsonSerializable(typeof(RalphTaskStatus))]
 [JsonSerializable(typeof(AssetModMetadata))]
+[JsonSerializable(typeof(StartupEvent))]
 public partial class AppJsonContext : JsonSerializerContext
 {
 }
diff --git a/src/GregModmanager.Core/Models/StartupEvent.cs b/src/GregModmanager.Core/Models/StartupEvent.cs
new file mode 100644
index 0000000..e73c1cc
--- /dev/null
+++ b/src/GregModmanager.Core/Models/StartupEvent.cs
@@ -0,0 +1,8 @@
+namespace GregModmanager.Models;
+
+public sealed record StartupEvent(
+    bool SteamActive,
+    string Culture,
+    string OsDescription,
+    string DotNetVersion
+);
diff --git a/src/GregModmanager.Core/Services/TelemetryService.cs b/src/GregModmanager.Core/Services/TelemetryService.cs
index 8531b66..cb6d478 100644
--- a/src/GregModmanager.Core/Services/TelemetryService.cs
+++ b/src/GregModmanager.Core/Services/TelemetryService.cs
@@ -99,7 +99,8 @@ public async Task TrackEventAsync(string eventName, object payload, Dictionary<s
         var message = payload switch
         {
             SyncCollectionEvent sync => JsonSerializer.Serialize(sync, AppJsonContext.Default.SyncCollectionEvent),
-            _ => JsonSerializer.Serialize(payload, payload.GetType(), AppJsonContext.Default.Options)
+            StartupEvent start => JsonSerializer.Serialize(start, AppJsonContext.Default.StartupEvent),
+            _ => "{}"
         };
 
         await PushToLokiAsync(eventName, message, labels);
diff --git a/tests/GregModmanager.Tests/GitHubModSourceTests.cs b/tests/GregModmanager.Tests/GitHubModSourceTests.cs
new file mode 100644
index 0000000..15d1305
--- /dev/null
+++ b/tests/GregModmanager.Tests/GitHubModSourceTests.cs
@@ -0,0 +1,35 @@
+using System.Linq;
+using Xunit;
+using GregModmanager.Services;
+
+namespace GregModmanager.Tests;
+
+public class GitHubModSourceTests
+{
+    [Fact]
+    public void ListPlugins_ReturnsExpectedHardcodedPlugins()
+    {
+        // Arrange
+        var source = new GitHubModSource();
+
+        // Act
+        var plugins = source.ListPlugins();
+
+        // Assert
+        Assert.NotNull(plugins);
+        Assert.Equal(4, plugins.Count);
+
+        // Verify the generated PluginIds
+        Assert.Equal("gregCore", plugins[0].PluginId);
+        Assert.Equal("gregMod.IPAM", plugins[1].PluginId);
+        Assert.Equal("gregMod.ResetSwitch", plugins[2].PluginId);
+        Assert.Equal("SteamPlugin", plugins[3].PluginId); // Mapped from "-DataCenter-ModLoader"
+
+        // Verify common properties for all returned plugins
+        foreach (var plugin in plugins)
+        {
+            Assert.Equal("Latest (GitHub)", plugin.Version);
+            Assert.Equal("github", plugin.Channel);
+        }
+    }
+}