1 files changed, 15 insertions, 0 deletions

diff --git a/src/WixToolset.Extensibility/ILibrarianExtension.cs b/src/WixToolset.Extensibility/ILibrarianExtension.cs
new file mode 100644
index 00000000..08d37607
--- /dev/null
+++ b/src/WixToolset.Extensibility/ILibrarianExtension.cs
@@ -0,0 +1,15 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Extensibility
+{
+    using WixToolset.Data;
+
+    public interface ILibrarianExtension
+    {
+        void PreCombine(ILibraryContext context);
+
+        string Resolve(SourceLineNumber sourceLineNumber, string table, string path);
+
+        void PostCombine(Library library);
+    }
+}