diff --git a/doc/architecture-ide.md b/doc/architecture-ide.md
index 1af30ac..3faea56 100644
--- a/doc/architecture-ide.md
+++ b/doc/architecture-ide.md
@@ -125,7 +125,7 @@ win o acme/6c460de7 prompt
 
 `OllieHere` prints the `session/agent` path. `win` starts the command line in Acme. The remainder is the command and its arguments; `win` runs it and exits when the command exits. The first command displays the agent chat stream in the embedded terminal. The second runs the prompt REPL there. These are ordinary terminal commands, not special Acme UI components.
 
-## Kate
+### Kate
 
 The Kate plugin implements the same pattern natively. It obtains the active document and selection through KTextEditor, ensures a project agent, and writes directly to the agent’s `prompt` file through `libollie9p`.