Worked on enhancing documentation build stability for the spack/spack and spack/spack-packages repositories by updating Sphinx theme compatibility and modernizing dependencies. Focused on supporting newer versions of py-sphinx-rtd-theme, refining dependency ranges for Python, py-sphinx, and py-docutils, and introducing py-sphinxcontrib-jquery to ensure seamless theme integration. Leveraged skills in dependency management, package management, and Python packaging to reduce build failures and improve compatibility with the evolving Python and Sphinx ecosystems. These updates streamlined the documentation pipeline, enabling faster onboarding and reducing maintenance overhead for downstream users who rely on up-to-date documentation tooling and continuous integration workflows.