Git rebase is one of the most powerful tools in modern development—yet it’s often misused, and almost always misconfigured. By default, it’s built for rewriting history, not for protecting it. Every interactive rebase, squash, or cleanup can accidentally surface sensitive data buried deep in a commit tree. Without strict guardrails, private information can quietly travel through branches, pull requests, and mirrors until it lives forever in a public repository.
Privacy by default flips that dynamic. It makes sure that sensitive commits never leave the local machine, that rebases strip out anything that shouldn’t be shared, and that developers can rewrite history safely without risking private code, credentials, or customer data. It replaces manual policing with enforced rules, running every time the tool touches a commit.
The key to real privacy-by-default in Git rebase is automation. No mental checklist can compete with built-in scanning, commit filtering, and enforced policies that block dangerous pushes before they happen. Hooks and custom filters can do some of this, but they are brittle, team-specific, and easy to bypass. A real solution is opinionated. It integrates at the point of change, processes the commit metadata and the patch itself, and applies privacy rules without asking the developer to remember them.