Arran King worked on the elixir-lang/expert repository, focusing on backend development with Elixir to improve reliability and cross-shell compatibility in command execution. During this period, Arran addressed a persistent issue affecting PATH handling in Fish shell by removing unnecessary escape sequences from the PATH variable. This targeted bug fix enhanced the correctness of command execution, reducing failures related to PATH resolution in both local and CI environments. The work demonstrated careful attention to shell interoperability and commit clarity, resulting in a well-documented change that benefits Fish shell users and supports robust, maintainable backend workflows using Elixir and shell scripting.