git-machete

Git-machete keeps track of which branch depends on which and automates the rebasing. You define your branch tree, and it handles the cascading rebases that would otherwise take 15 minutes of manual work.

Fully free under MIT. Install via pip or Homebrew. No paid tier, no hosted version. It adds commands to Git: `git machete discover` auto-detects your branch structure, `git machete traverse` walks through branches and rebases them in order, and `git machete status` shows the tree visually.

The catch: this is a power-user tool. If you work on one branch at a time and merge to main, you don't need it. The value only kicks in with stacked PRs or complex branch hierarchies. And the learning curve is real; you need to understand Git's rebase model well enough to know what git-machete is doing on your behalf. The has_pricing_page flag is misleading; the PyPI link isn't a pricing page, the tool is free.