ok now it works

CringePlugins/Config/PackagesConfig.cs

@@ -0,0 +1,13 @@
+using System.Collections.Immutable;
+using CringePlugins.Resolver;
+using NuGet;
+using NuGet.Models;
+
+namespace CringePlugins.Config;
+
+public record PackagesConfig(ImmutableArray<PackageSource> Sources, ImmutableArray<PackageReference> Packages)
+{
+    public static PackagesConfig Default { get; } = new([
+        new(string.Empty, "https://api.nuget.org/v3/index.json")
+    ], []);
+}