When a log line contains {main_model, weak_model, editor_model} does the existence of main_model mean that mean the person was using Aider in Architect/Editor m

When a log line contains {main_model, weak_model, editor_model} does the existence of main_model mean that mean the person was using Aider in Architect/Editor mode? Do you usually use that mode and, if so, with which architect? Thank you!