Worked on the edgexfoundry/edgex-go repository to deliver the official changelog for the 4.0.2 release, providing comprehensive documentation of new features, bug fixes, code refactoring, and build changes. Focused on ensuring the release notes were clear, traceable, and aligned with project standards to support both customer onboarding and post-release support. Utilized Markdown for documentation and applied version control best practices to maintain a single authoritative changelog entry. The work demonstrated disciplined release engineering by capturing the full scope of changes in a structured, accessible format, contributing to the overall reliability and transparency of the release process.