This could be either for obscuring the data within a wiki, for further compressing the wiki itself, or both. From the original issue:
Compression via jszip before save to reduce size on disk. You could get inspiration about the decompression from https://github.com/alcor/itty-bitty
But a good compression and decompression lib seems to be this:
Where the inflator is 3kb and total is 8kb.
If this can be a plugin, great, but an external tool seems more feasable (maybe with a plugin for making it more automatic/easier to use). This functionality will absolutely not be included in any core Feather Wiki version, though.
Deleting a branch is permanent. It CANNOT be undone. Continue?