Worked on stabilizing the Agent Node Tool within the langgenius/dify repository by addressing a parsing issue related to non-auto variable type parameters. Focused on backend development using Python, the work involved refining error handling to ensure that variable selectors are parsed correctly and that invalid inputs trigger clear, actionable error messages. This targeted bug fix improved the reliability of agent workflows and reduced the risk of misconfiguration in automation pipelines. The solution was delivered through cross-team collaboration and careful alignment with project guidelines, resulting in more robust parameter handling and easier debugging for future development and maintenance efforts.