Worked on improving virtual environment activation reliability for Windows users of the Fish shell by addressing path normalization issues in both the astral-sh/uv and python/cpython repositories. Applied cygpath to standardize the VIRTUAL_ENV variable, ensuring consistent path styles and reducing activation errors across Cygwin, MinGW, and MSYS2 environments. Focused on cross-platform development and environment management, using Rust and shell scripting to implement and validate the fixes. The changes enhanced onboarding and stability for Windows-based workflows, with clear traceability and local validation steps included in the pull requests to maintain code quality and facilitate future maintenance across both projects.