diff --git a/src/gui_2.py b/src/gui_2.py
index 2ddbe5c7..5d815f5c 100644
--- a/src/gui_2.py
+++ b/src/gui_2.py
@@ -4150,6 +4150,22 @@ def render_discussion_entry(app: App, entry: dict, index: int) -> None:
   imgui.separator()
 
 def render_discussion_entry_read_mode(app: App, entry: dict, index: int) -> None:
+ """
+ Renders a discussion entry in read-only mode.
+ Parses the markdown content, isolates retrieved context sections (RAG chunks),
+ handles custom definition/AST links, and invokes the markdown syntax highlighter.
+
+ State Mutations:
+   app.text_viewer_title, app.text_viewer_content, app.text_viewer_type (populated on [Source] click)
+   app.show_windows["Text Viewer"] (set to True on [Source] click)
+
+ DAG Render Context:
+   Called by: render_discussion_entry()
+   Calls: markdown_helper.render(), mcp_client.read_file()
+
+ Threading & Safety:
+   Must run synchronously on the Main Thread.
+ """
  with imscope.id(f"read_{index}"):
   content = entry["content"]
   if not content.strip(): return