Developed a structured fetch output feature for the lightpanda-io/browser repository, introducing a --json option that outputs HTTP metadata using a JsonEnvelope-based schema. This work focused on backend development and API design in Zig, enabling consistent JSON serialization of key response elements such as URL, status code, headers, and rendered content. By unifying the output format, the implementation improved automation reliability in pipelines and reduced debugging complexity, regardless of the use of the --dump flag. The approach emphasized maintainability and observability, with code changes reviewed and prepared for merge, reflecting a methodical and standards-driven engineering process in data serialization.