Over a two-month period, contributed to both the renovatebot/renovate and cachix/devenv repositories by delivering targeted feature enhancements focused on reliability and configuration flexibility. In renovatebot/renovate, refactored Kustomize module tests using TypeScript to remove dependencies on fixtures and snapshots, which improved test clarity, maintainability, and CI stability. For cachix/devenv, implemented a configurable WireMock root directory setup in Nix, introducing direct root directory configuration and enforcing mutual exclusion with existing mappings to prevent conflicts. Emphasized clear documentation and configuration management throughout, resulting in more predictable environment setups and streamlined onboarding for both local development and continuous integration workflows.