fix crash in SpecWriter

Author: senko

core/agents/spec_writer.py

@@ -76,6 +76,8 @@ async def initialize_spec(self) -> AgentResponse:
         if len(user_description) < ANALYZE_THRESHOLD and complexity != Complexity.SIMPLE:
             initial_spec = await self.analyze_spec(user_description)
             reviewed_spec = await self.review_spec(desc=user_description, spec=initial_spec)
+        else:
+            initial_spec = reviewed_spec = user_description
 
         self.next_state.specification = self.current_state.specification.clone()
         self.next_state.specification.original_description = user_description