Charles focused on improving dependency management and tooling stability for the evidence-dev/evidence repository during February 2025. He upgraded development dependencies, including moving Vitest to version 2.1.9, to enhance compatibility and test reliability. By cleaning the lockfile and removing deprecated entries, Charles ensured reproducible builds and a smoother development workflow. His work addressed potential issues with flaky tests and install inconsistencies, aligning the CI and build processes for greater stability. Utilizing JavaScript, TypeScript, and npm, Charles concentrated on maintaining accurate dependency states, demonstrating a methodical approach to engineering that prioritized long-term project health over rapid feature delivery.