Worked on enhancing the circleci/circleci-docs repository by improving documentation for the CircleCI CLI, with a focus on clarifying command descriptions and providing a practical example for environment variable substitution. Applied technical writing and documentation skills to update adoc files, ensuring that users can better understand the purpose and usage of various CLI subcommands. Delivered a targeted feature that demonstrates how to use the env subst command within CircleCI configurations, aiming to reduce user confusion and support requests. The work emphasized clear, actionable guidance, resulting in more accessible documentation for developers integrating environment variables into their CircleCI workflows.