Worked on the openclaw/openclaw repository to deliver a timezone-aware heartbeat feature, enabling users to configure active hours for heartbeats based on custom timezones. This involved updating Markdown documentation, including the changelog and heartbeat guides, to clearly outline new parameters and provide usage examples. Addressed a tooling issue by refining Git configuration, specifically updating .gitattributes and adjusting formatting scripts to handle symlinked Markdown files correctly, which improved repository hygiene and prevented newline-related regressions. Leveraged DevOps practices and documentation skills to enhance both feature functionality and development workflows, resulting in more efficient heartbeat management and stable tooling for contributors.