Git rerere Can Reuse Your Merge Conflict Fix So You Resolve It Once

Developers running multiple AI coding agents on separate branches often hit the same merge conflict repeatedly when combining their work. The article demonstrates how Git's rerere feature, short for reuse recorded resolution, solves this by remembering how a conflict was resolved. Once enabled, Git automatically reapplies a saved resolution whenever the identical conflict reappears during later merges or rebases. The walkthrough sets up a demo repository with two worktrees simulating agents editing the same login function. It then shows how to enable rerere, inspect what will be recorded with status and diff, and commit the resolution once for reuse.