Create or update a GitHub pull request from a specification by applying repository PR template structure and body-file markdown handling.
Use this skill when the user provides a spec/plan and asks to create or update a PR.
main).# Check existing PR for branch
gh pr list --head <branch> --json number,url,title --jq '.[0]'
# Create
gh pr create --base <base> --head <branch> --title "<title>" --body-file <path>
# Update
gh pr edit <number-or-url> --title "<title>" --body-file <path>
--body-file.