The author applied the Autoresearch concept to an old research project, using a large language model (LLM) agent to iteratively improve a machine learning model. The agent was able to find and fix a bug, perform hyperparameter tuning, and explore new ideas, resulting in a significant improvement in the model's performance. The experiment was run in a sandboxed environment to prevent the agent from causing harm. The author notes that the LLM agent was able to automate some tedious tasks, but its effectiveness decreased when exploring more complex ideas.