diff --git a/src/NexusMods.DataModel/JsonConverters/OptionalConverter.cs b/src/NexusMods.DataModel/JsonConverters/OptionalConverter.cs
new file mode 100644
index 0000000000..c71270a05e
--- /dev/null
+++ b/src/NexusMods.DataModel/JsonConverters/OptionalConverter.cs
@@ -0,0 +1,69 @@
+using System.Reflection;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using DynamicData.Kernel;
+using JetBrains.Annotations;
+
+namespace NexusMods.DataModel.JsonConverters;
+
+///
+/// Converter factory for
+///
+[UsedImplicitly]
+public class OptionalConverterFactory : JsonConverterFactory
+{
+ ///
+ public override bool CanConvert(Type typeToConvert)
+ {
+ if (!typeToConvert.IsGenericType) return false;
+ return typeToConvert.GetGenericTypeDefinition() == typeof(Optional<>);
+ }
+
+ ///
+ public override JsonConverter CreateConverter(Type typeToConvert, JsonSerializerOptions options)
+ {
+ var typeArguments = typeToConvert.GetGenericArguments();
+ var valueType = typeArguments[0];
+
+ var converter = (JsonConverter)Activator.CreateInstance(
+ type: typeof(OptionalConverter<>).MakeGenericType(valueType),
+ bindingAttr: BindingFlags.Instance | BindingFlags.Public,
+ binder: null,
+ args: [options],
+ culture: null
+ )!;
+
+ return converter;
+ }
+
+ private class OptionalConverter : JsonConverter>
+ where TValue : notnull
+ {
+ private readonly JsonConverter _valueConverter;
+
+ [UsedImplicitly]
+ public OptionalConverter(JsonSerializerOptions options)
+ {
+ _valueConverter = (JsonConverter)options.GetConverter(typeof(TValue));
+ }
+
+ public override Optional Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+ {
+ if (reader.TokenType == JsonTokenType.Null) return Optional.None;
+ var value = _valueConverter.Read(ref reader, typeToConvert, options);
+ return Optional.Create(value);
+ }
+
+ public override void Write(Utf8JsonWriter writer, Optional value, JsonSerializerOptions options)
+ {
+ if (!value.HasValue)
+ {
+ writer.WriteNullValue();
+ }
+ else
+ {
+ _valueConverter.Write(writer, value.Value, options);
+ }
+ }
+ }
+}
diff --git a/src/NexusMods.DataModel/Services.cs b/src/NexusMods.DataModel/Services.cs
index f0aa4190ff..5d31e89a54 100644
--- a/src/NexusMods.DataModel/Services.cs
+++ b/src/NexusMods.DataModel/Services.cs
@@ -86,7 +86,9 @@ public static IServiceCollection AddDataModel(this IServiceCollection coll)
coll.AddSingleton();
coll.AddSingleton();
coll.AddSingleton();
-
+ coll.AddSingleton();
+ coll.AddSingleton();
+
// Game Registry
coll.AddSingleton();
coll.AddHostedService(s => (GameRegistry)s.GetRequiredService());