fix: preserve exploration demonstration source and recording scope

artemis/agents/checker/checker.py

@@ -985,10 +985,12 @@ async def run_final_check(
         HumanMessage(content=content),
     ]
     if getattr(ctx, "exploration_id", None):
+        from artemis.exploration.demonstrations import DEMONSTRATION_SOURCE_RULE
         from artemis.exploration.runtime import conversation_message, history_tool
 
         # Questions, answers and demonstrations are separate from device steps.
         # The verifier needs their actual order and the user's revised criteria.
+        messages.append(SystemMessage(content=DEMONSTRATION_SOURCE_RULE))
         messages.append(conversation_message(ctx))
         tools.append(history_tool(ctx))
     with CheckerStreamCapture(ctx) as capture: