Kleber Souza enhanced the sched-ext/scx repository by improving the Ubuntu installation documentation, focusing on dependency management and onboarding efficiency. He updated the guide to include libbpf-dev as a development dependency, ensuring that necessary headers are available for building C schedulers on Ubuntu systems. Using Markdown and Shell scripting, Kleber removed outdated PPA instructions and deprecated the use of the -d flag, instead directing users toward the latest stable kernel releases. These changes streamlined the installation process, reduced potential errors, and minimized support overhead, reflecting a thoughtful approach to build systems and documentation quality within a short project timeframe.