During February 2026, Anirudh Chicheruku developed a targeted feature for the browser-use/browser-use repository, focusing on improving large language model safety and developer experience with sensitive data placeholders. He implemented Sensitive Data Placeholder Guidance, introducing a visible SENSITIVE DATA header, a bulleted list of placeholders, explicit usage instructions, and a concrete example to clarify correct handling. Using Python and backend development skills, Anirudh updated the _get_sensitive_data_description() function to ensure placeholders are wrapped in <secret> tags, addressing previous issues where literal names were emitted. This work reduced LLM handling errors and enhanced documentation, demonstrating thoughtful prompt engineering and code refinement.