diff --git a/mROA.CodegenTools/InsertTemplatePart.cs b/mROA.CodegenTools/InsertTemplatePart.cs
index fd9ac4d..26ead20 100644
--- a/mROA.CodegenTools/InsertTemplatePart.cs
+++ b/mROA.CodegenTools/InsertTemplatePart.cs
@@ -3,7 +3,7 @@ using System.Collections.Generic;
 
 namespace mROA.CodegenTools
 {
-    public class InsertTemplatePart : ITemplatePart, ITagged
+    public class InsertTemplatePart : ITagged
     {
         private object _insertedValue;
         private string _tag;
diff --git a/mROA.CodegenTools/ProgrammableTextPart.cs b/mROA.CodegenTools/ProgrammableTextPart.cs
new file mode 100644
index 0000000..132bbcf
--- /dev/null
+++ b/mROA.CodegenTools/ProgrammableTextPart.cs
@@ -0,0 +1,24 @@
+using System;
+
+namespace mROA.CodegenTools
+{
+    public class ProgrammableTextPart : ITemplatePart
+    {
+        public TemplateDocument Context { get; set; }
+        public int TargetLength => 0;
+
+        private Func<object, string> _bakeFunc;
+
+        public ProgrammableTextPart(Func<object, string> bakeFunc, TemplateDocument context)
+        {
+            _bakeFunc = bakeFunc;
+            Context = context;
+        }
+
+
+        public string Bake()
+        {
+            return _bakeFunc(Context.AdditionalContext);
+        }
+    }
+}
\ No newline at end of file
diff --git a/mROA.CodegenTools/TemplateDocument.cs b/mROA.CodegenTools/TemplateDocument.cs
index 85b006f..0f73749 100644
--- a/mROA.CodegenTools/TemplateDocument.cs
+++ b/mROA.CodegenTools/TemplateDocument.cs
@@ -7,6 +7,7 @@ namespace mROA.CodegenTools
     public class TemplateDocument
     {
         public List<ITemplatePart> Parts { get; }
+        public object AdditionalContext { get; set; }
         public ITagged this[string tag] => Parts.OfType<ITagged>().FirstOrDefault(i => i.Tag == tag);
         public void Insert(string tag, object value)
         {