Do you work on staging or live? Can you fix it without breaking my store?

We reproduce on a clone first, never debug on a live store. The fix is built and tested on a staging copy or a local mirror of your exact stack (same PHP, same Magento version), lands on a git branch as a reviewable diff, and only then deploys to production in your maintenance window after we take a snapshot. That snapshot is the rollback: if anything is off, we revert in minutes. If you only have live access, our first step is to stand up a safe clone.