Jacek contributed to the snyk/cli and snyk/cli-extension-os-flows repositories by building features that enhance CLI observability and policy-driven vulnerability management. He enabled OS extension support for monitor command reachability, routing commands through the extension and updating dependencies to improve operational diagnostics. In the cli-extension-os-flows project, Jacek implemented vulnerability transformation with ignore handling, introducing new data models and staged processing to support policy-based ignore rules. His work involved backend development, API design, and code refactoring using Go and TypeScript, demonstrating a thoughtful approach to scalable governance and maintainability while laying the groundwork for future policy application across projects.