> How do I know what a hash refers to?
I believe the reason for this stems from a curiosity of the user of whether they _might_ find that thread interesting or whether there are new interested feeds to follow?
Although my idea increases complexity slightly (_introducing a new concept_) I don't think it's particular hard to understand, reason about or implement (_complicated_). One could even even make the implementation quite simple in fact.
Either way, the idea of a service (_cantralised_) or participating clients/registries (_distributed_) providing reverse hash lookups doesn't sound too bad really.
What do you propose to solve the above problem? 🤔