- **vfile.mhash** field: this was added sometime after the lib took a break and needs to be populated/handled by the lib code. (It seems to be only updated when merging?)

- **files_of_checkin** virtual table. This is needed for certain queries, e.g. fossil's `/finfo` page uses it.

- **Port over checkout/repo fingerprint**: this allows detection of when a checkout's repo has been replaced by one with different RIDs. See fossil's `vfile.c:vfile_rid_renumbering_event()`. Calculation and confirmation of the fingerprint [was added on 2021-04-16](8c9cf48702cf3d4f) but still TODO is an attempt at automatic recovery.

- **Cross-linking of tickets**: the library can read and write them but they cannot yet be crosslinked. Currently, depending on a context-dependent flag, it may error out if it tries to crosslink one or it may silently skip over it.

- **Rebuild**: this is implemented with the exception of still-incomplete ticket crosslinking. Once those crosslinking bits are in place, "rebuild" of them with "just work."

- **Double-check crosslinking of other types** and make sure that we are not missing newly-added features.

- **Stash** support. First requires merge support. (Or does it just require update support? We have that part.)

- **Unversioned files** should be trivial to do.

- Maybe pending-moderation support (tickets, ticket comments, wiki edits), depending on how centrally-managed such data need to be (i.e. whether it can be delegated to an app layer).