Alexey Tochin focused on improving build stability and dependency management for the simonmichael/stackage repository during February 2025. He addressed a compatibility issue by constraining the inf-backprop package to work with a specific version of the isomorphism-class library, reducing the risk of build failures as new library versions are released. His work centered on build system configuration, leveraging skills in YAML to update and validate dependency constraints. Although the scope was limited to a single targeted bug fix rather than feature development, Alexey’s contribution enhanced CI reliability and ensured smoother integration of future updates within the project’s dependency ecosystem.