The tailor tool moves patches and changesets between different repositories, preserving as much information as possible. The repositories can be managed by different version control systems. Currently, ArX, Bazaar, Bazaar-NG, Codeville, CVS, Darcs, Git, Mercurial, Monotone, Subversion, and Tla are supported.

While tailor is useful for one-time operation, when switching to a different version control system, it can also synchronise repositories on an ongoing basis. Changesets are either pulled one-way from a master repository, or migrated back and forth for full two-way synchronisation.