diff --git a/src/kimi_cli/soul/kimisoul.py b/src/kimi_cli/soul/kimisoul.py
index e2501bf38..c3f280c73 100644
--- a/src/kimi_cli/soul/kimisoul.py
+++ b/src/kimi_cli/soul/kimisoul.py
@@ -480,7 +480,14 @@ async def run(self, user_input: str | list[ContentPart]):
             set_session_id(self._runtime.session.id)
 
             # --- UserPromptSubmit hook ---
-            text_input_for_hook = user_input if isinstance(user_input, str) else ""
+            if isinstance(user_input, str):
+                text_input_for_hook = user_input
+            else:
+                _parts: list[str] = []
+                for _part in user_input:
+                    if getattr(_part, "type", None) == "text":
+                        _parts.append(getattr(_part, "text", ""))
+                text_input_for_hook = "".join(_parts)
             from kimi_cli.hooks import events
 
             hook_results = await self._hook_engine.trigger(