Over a two-month period, Black Box enhanced maintainability and clarity across several open-source repositories, including nspcc-dev/neofs-node, xmtp/xmtpd, and shykes/dagger. They refactored decode hooks in Go to strengthen type safety, modernized code by replacing interface{} with any, and improved documentation and comment accuracy to reduce developer confusion. In shykes/dagger, Black Box aligned in-code comments with actual function names, supporting easier onboarding and code reviews. Their work spanned Go and JavaScript, emphasizing backend development, benchmarking, and technical writing. These targeted improvements reduced risk, improved developer velocity, and established clearer guidelines for future contributors, demonstrating thoughtful, detail-oriented engineering.