Restructured the project structure back to the way it was, there's no reasonable way to split the modules

src/NadekoBot/_common/Attributes/UserPermAttribute.cs

@@ -0,0 +1,29 @@
+using Microsoft.Extensions.DependencyInjection;
+
+namespace Discord;
+
+[AttributeUsage(AttributeTargets.Method, AllowMultiple = true)]
+public class UserPermAttribute : RequireUserPermissionAttribute
+{
+    public UserPermAttribute(GuildPerm permission)
+        : base(permission)
+    {
+    }
+
+    public UserPermAttribute(ChannelPerm permission)
+        : base(permission)
+    {
+    }
+
+    public override Task<PreconditionResult> CheckPermissionsAsync(
+        ICommandContext context,
+        CommandInfo command,
+        IServiceProvider services)
+    {
+        var permService = services.GetRequiredService<IDiscordPermOverrideService>();
+        if (permService.TryGetOverrides(context.Guild?.Id ?? 0, command.Name.ToUpperInvariant(), out _))
+            return Task.FromResult(PreconditionResult.FromSuccess());
+
+        return base.CheckPermissionsAsync(context, command, services);
+    }
+}