There are some special files that fossil uses to store information about a repository.
- _FOSSIL_: this file identifies a directory as a fossil repository.
- manifest: this is a list of all managed files in the repository.
- manifest.uuid: this is a unique identifier. In addition, coopy will place this file in the same directory:
- repository.coopy: this is a database containing information about the repository. In fossil terms, this is the "real" repository, and the rest is just a "view" or "source tree". So as not to confuse people who have not used a version control system before, the coopy program does not emphasize this distinction. The fossil or ssfossil program can be used to create multiple views of the same fossil repository.