Uses PyGithub to interact with the GitHub REST API.
- Reads GITHUB_TOKEN from env; parses owner/repo from SSH or HTTPS URL
- create_branch() creates a branch off the configured base branch
- commit() accepts dict[str, str] {path: content} or list[str] of
local paths; uses Contents API (create_file / update_file)
- create_pr() and get_pr_status() delegate to PyGithub pull-request API
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
