diff --git a/compiler/NubLang.LSP/DiagnosticsPublisher.cs b/compiler/NubLang.LSP/DiagnosticsPublisher.cs
new file mode 100644
index 0000000..bfe7416
--- /dev/null
+++ b/compiler/NubLang.LSP/DiagnosticsPublisher.cs
@@ -0,0 +1,24 @@
+using OmniSharp.Extensions.LanguageServer.Protocol.Document;
+using OmniSharp.Extensions.LanguageServer.Protocol.Models;
+using OmniSharp.Extensions.LanguageServer.Protocol.Server;
+
+namespace NubLang.LSP;
+
+public class DiagnosticsPublisher
+{
+    private readonly ILanguageServerFacade _server;
+
+    public DiagnosticsPublisher(ILanguageServerFacade server)
+    {
+        _server = server;
+    }
+
+    public void Publish(Uri uri, IEnumerable<Diagnostic> diagnostics)
+    {
+        _server.TextDocument.PublishDiagnostics(new PublishDiagnosticsParams
+        {
+            Uri = uri,
+            Diagnostics = new Container<Diagnostic>(diagnostics)
+        });
+    }
+}
\ No newline at end of file
diff --git a/compiler/NubLang.LSP/HoverHandler.cs b/compiler/NubLang.LSP/HoverHandler.cs
new file mode 100644
index 0000000..3907db3
--- /dev/null
+++ b/compiler/NubLang.LSP/HoverHandler.cs
@@ -0,0 +1,18 @@
+using OmniSharp.Extensions.LanguageServer.Protocol.Client.Capabilities;
+using OmniSharp.Extensions.LanguageServer.Protocol.Document;
+using OmniSharp.Extensions.LanguageServer.Protocol.Models;
+
+namespace NubLang.LSP;
+
+internal class HoverHandler : HoverHandlerBase
+{
+    protected override HoverRegistrationOptions CreateRegistrationOptions(HoverCapability capability, ClientCapabilities clientCapabilities)
+    {
+        throw new NotImplementedException();
+    }
+
+    public override Task<Hover?> Handle(HoverParams request, CancellationToken cancellationToken)
+    {
+        throw new NotImplementedException();
+    }
+}
\ No newline at end of file
diff --git a/compiler/NubLang.LSP/TextDocumentSyncHandler.cs b/compiler/NubLang.LSP/TextDocumentSyncHandler.cs
new file mode 100644
index 0000000..6c8c97b
--- /dev/null
+++ b/compiler/NubLang.LSP/TextDocumentSyncHandler.cs
@@ -0,0 +1,71 @@
+using MediatR;
+using OmniSharp.Extensions.LanguageServer.Protocol;
+using OmniSharp.Extensions.LanguageServer.Protocol.Client.Capabilities;
+using OmniSharp.Extensions.LanguageServer.Protocol.Document;
+using OmniSharp.Extensions.LanguageServer.Protocol.Models;
+using OmniSharp.Extensions.LanguageServer.Protocol.Server;
+
+namespace NubLang.LSP;
+
+internal class TextDocumentSyncHandler : TextDocumentSyncHandlerBase
+{
+    private readonly DiagnosticsPublisher _diagnostics;
+
+    public TextDocumentSyncHandler(DiagnosticsPublisher diagnostics)
+    {
+        _diagnostics = diagnostics;
+    }
+    
+    public override TextDocumentAttributes GetTextDocumentAttributes(DocumentUri uri)
+    {
+        return new TextDocumentAttributes(uri, "nub-lang");
+    }
+
+    public override Task<Unit> Handle(DidOpenTextDocumentParams request, CancellationToken cancellationToken)
+    {
+        return Unit.Task;
+    }
+
+    public override Task<Unit> Handle(DidChangeTextDocumentParams request, CancellationToken cancellationToken)
+    {
+        _diagnostics.Publish(new Uri("https://example.com"), [new Diagnostic
+        {
+            Severity = DiagnosticSeverity.Error,
+        }]);
+        return Unit.Task;
+    }
+
+    public override Task<Unit> Handle(DidSaveTextDocumentParams request, CancellationToken cancellationToken)
+    {
+        return Unit.Task;
+    }
+
+    public override Task<Unit> Handle(DidCloseTextDocumentParams request, CancellationToken cancellationToken)
+    {
+        return Unit.Task;
+    }
+
+    protected override TextDocumentSyncRegistrationOptions CreateRegistrationOptions(TextSynchronizationCapability capability, ClientCapabilities clientCapabilities)
+    {
+        return new TextDocumentSyncRegistrationOptions();
+    }
+}
+
+public class DiagnosticsPublisher
+{
+    private readonly ILanguageServerFacade _server;
+
+    public DiagnosticsPublisher(ILanguageServerFacade server)
+    {
+        _server = server;
+    }
+
+    public void Publish(Uri uri, IEnumerable<Diagnostic> diagnostics)
+    {
+        _server.TextDocument.PublishDiagnostics(new PublishDiagnosticsParams
+        {
+            Uri = uri,
+            Diagnostics = new Container<Diagnostic>(diagnostics)
+        });
+    }
+}
\ No newline at end of file
diff --git a/compiler/NubLang.LSP/WorkspaceManager.cs b/compiler/NubLang.LSP/WorkspaceManager.cs
new file mode 100644
index 0000000..007ec2d
--- /dev/null
+++ b/compiler/NubLang.LSP/WorkspaceManager.cs
@@ -0,0 +1,6 @@
+namespace NubLang.LSP;
+
+public class WorkspaceManager
+{
+    
+}
\ No newline at end of file