diff --git a/include/ghostty/vt.h b/include/ghostty/vt.h
index 42cd73e37..dd5eda989 100644
--- a/include/ghostty/vt.h
+++ b/include/ghostty/vt.h
@@ -29,6 +29,7 @@
  *
  * The API is organized into the following groups:
  * - @ref terminal "Terminal" - Complete terminal emulator state and rendering
+ * - @ref formatter "Formatter" - Format terminal content as plain text, VT sequences, or HTML
  * - @ref key "Key Encoding" - Encode key events into terminal sequences
  * - @ref osc "OSC Parser" - Parse OSC (Operating System Command) sequences
  * - @ref sgr "SGR Parser" - Parse SGR (Select Graphic Rendition) sequences