Worked on the yuwata/systemd repository to enhance the clarity of systemd-nspawn documentation, specifically addressing the handling of credentials. Focused on aligning the manual with current system behavior by removing outdated references to the --import-credential option, ensuring users receive accurate guidance. The update was implemented as a documentation-only feature, utilizing XML for structured documentation and drawing on system administration expertise to verify technical accuracy. No bugs were addressed during this period, and the contribution centered on improving user understanding of credential management in systemd-nspawn. The work demonstrated attention to detail and a methodical approach to maintaining technical documentation standards.