Worked on the virattt/ai-hedge-fund repository to enhance the command line interface by introducing support for ticker argument aliases, allowing users to specify stock tickers using either --tickers or --ticker. This feature was implemented in Python with a focus on CLI development and robust testing practices. The approach included expanding test coverage to validate both aliases and ensure consistent argument parsing, which helps prevent future regressions. By addressing user friction points and aligning with common workflows, the changes improved onboarding and daily usage for end users, ultimately making the CLI more flexible and reliable for ticker specification tasks.