Rationalize a repo's accumulated git worktrees and local branches down to a canonical line plus protected branches, harmonizing the strongest content from every variant onto a staging branch before any destructive cleanup. Use when a project has piled up local branches or linked worktrees ("213 branches, 47 worktrees", agent-swarm aftermath, "rationalize my branches", "kill all worktrees save what's worth saving", "merge what's worth merging and delete the rest", or "branch archaeology").