Implementations details can be found on discovery-channel GitHub's [0]

As far as I can tell Cabal uses discovery-swarm [1] for connection management.

[0] https://github.com/maxogden/discovery-channel

[1] https://github.com/mafintosh/discovery-swarm

Oh yeah, I understand that bit - but how does it connect to the DHT in the first place. I couldnt see any information on where it connects when you arent yet peered (i.e. how does it bootstrap).

There are a collection of hyperswarm bootstrap node IPs that can get the discovery process started for new peers.

Many thanks - is this in the codebase or handled via some config? I couldnt see it from my (limited) searching.