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

src/NadekoBot/Modules/Help/HelpService.cs

@@ -0,0 +1,34 @@
+using NadekoBot.Common;
+using NadekoBot.Common.ModuleBehaviors;
+
+namespace NadekoBot.Modules.Help.Services;
+
+public class HelpService(BotConfigService bss, IReplacementService repSvc) : IExecNoCommand, INService
+{
+    public async Task ExecOnNoCommandAsync(IGuild? guild, IUserMessage msg)
+    {
+        var settings = bss.Data;
+        if (guild is null)
+        {
+            if (string.IsNullOrWhiteSpace(settings.DmHelpText) || settings.DmHelpText == "-")
+                return;
+
+            // only send dm help text if it contains one of the keywords, if they're specified
+            // if they're not, then reply to every DM
+            if (settings.DmHelpTextKeywords is not null &&
+                !settings.DmHelpTextKeywords.Any(k => msg.Content.Contains(k)))
+            {
+                return;
+            }
+
+            var repCtx = new ReplacementContext(guild: guild, channel: msg.Channel, users: msg.Author)
+                .WithOverride("%prefix%", () => bss.Data.Prefix)
+                .WithOverride("%bot.prefix%", () => bss.Data.Prefix);
+
+            var text = SmartText.CreateFrom(settings.DmHelpText);
+            text = await repSvc.ReplaceAsync(text, repCtx);
+
+            await msg.Channel.SendAsync(text);
+        }
+    }
+}