The way I've thought about this, we will not have "files inside tags", but we will have tags (foo, bar, baz) attached to a file as additional encrypted metadata.
We have existing client-side infrastructure[0] that can create auto-updating albums based on metadata, and this can be extended to enable sharing workflows.
We have existing client-side infrastructure[0] that can create auto-updating albums based on metadata, and this can be extended to enable sharing workflows.
[0]: https://ente.com/help/photos/features/albums-and-organizatio...