diff --git a/web/src/engine/predictive-text/worker-thread/src/main/model-compositor.ts b/web/src/engine/predictive-text/worker-thread/src/main/model-compositor.ts
index 1a514cad649..fce8fefee18 100644
--- a/web/src/engine/predictive-text/worker-thread/src/main/model-compositor.ts
+++ b/web/src/engine/predictive-text/worker-thread/src/main/model-compositor.ts
@@ -1,3 +1,13 @@
+/*
+ * Keyman is copyright (C) SIL Global. MIT License.
+ *
+ * Created by jahorton (date of creation lost)
+ *
+ * This file provides the main interface between the worker and the lexical
+ * model or models in active use, providing methods for text-prediction,
+ * application of suggestions, and reversion of previously-applied suggestions.
+ */
+
 import * as models from '@keymanapp/models-templates';
 import { LexicalModelTypes } from '@keymanapp/common-types';