Worked on the DataDog/chaos-controller repository to implement a Python dependency lockfile, focusing on securing and reproducing builds for improved deployment reliability. The approach centered on Python packaging and dependency management, using Makefile and YAML to automate the integration within CI/CD pipelines. By pinning transitive dependencies, the work reduced deployment drift and streamlined vulnerability management, enabling faster security audits and more deterministic builds. No major bugs were addressed during this period, as the primary emphasis was on build governance and code hygiene. This foundation supports future lockfile-driven tooling and contributes to ongoing CI/CD hardening for the project’s infrastructure.