Precise code navigation for Python, and code navigation in pull requests

GitHub has introduced two enhancements to its code navigation features, now available on both the platform's main site and in the new code search technology preview. The first enhancement extends code navigation capabilities to the "files changed" tab of pull requests, thereby enabling users to assess the impact of changes by viewing all affected callers. The second enhancement improves code navigation for Python by introducing stack graphs, which provide precise results by encoding detailed information about Python's name binding rules without requiring additional configuration. This updated framework currently applies to Python, but GitHub plans to extend stack graph support to other languages in the future, leveraging their open-source stack-graphs library built on the Tree-sitter ecosystem. Additional resources, including a deep dive post and a presentation, are available for those interested in understanding how stack graphs facilitate precise code navigation.