Stacked & Multi-base PRs

Stacked (dependent) PRs

A child PR builds on a parent PR's branch. Update the stack bottom-up:

1. Update the parent branch/PR first.
2. Rebase the child onto the updated parent — not onto the default branch, and never "merge main into the leaf" as the only step.
3. Push each level; keep each PR's base pointing at the one below it.

Multi-base (release + default)

Some orgs require the same change on the default branch AND a release/production branch: