Worked on security hardening for Windows builds in the github-maccloud/runner-images repository, focusing on improving the integrity of build automation processes. Addressed a critical bug by updating the Azure CLI signature and Cosmos DB Emulator SHA256 hash within PowerShell-based build scripts, ensuring that only authentic tools are used during continuous integration. This approach strengthened artifact verification and reduced the risk of tampering in the CI pipeline. The work demonstrated a methodical application of DevOps and scripting skills, delivering a traceable and well-documented change that aligned with security baselines and operational clarity for Windows build environments over the course of the month.