Let's check in with nip42, AUTH and use Amethyst and theforest.nostr1.com relay as an example.

"nip42 defines a way for clients to authenticate to relays by signing an ephemeral event.

This NIP defines a new message, AUTH, which relays can send when they support authentication and clients can send to relays when they want to authenticate."

I use theforest.nostr1 relay as my top relay to read and write from. I think if you look, many of you use this relay too. 

You may have noticed this note by 
nostr:nprofile1qqsd6ejdteqpvse63ntf7qz6u9yqspp4z7ymt8094urzwm0x2ceaxxgpr3mhxue69uhhg6r9vd5hgctyv4kzumn0wd68yvfwvdhk6tcpzfmhxue69uhkummnw3eryvfwvdhk6tcprpmhxue69uhkv6tvw3jhytnwdaehgu3wwa5kuef007jkkc 

nostr:nevent1qqs93xdw936muekdly8jswelanhcne7jw09dv5zgxq6mhzc5hy6xx0sprdmhxue69uhhg6r9vehhyetnwshxummnw3erztnrdakj7q3qm4ny6hjqzepn4rxknuq94c2gpqzr29ufkkw7ttcxyak7v43n6vvsxpqqqqqqz9ezgqz

By using a client that supports nip42, it will Authenticate the npub to the relay if previously whitelisted to write. Amethyst supports nip42. This will allow you to continue to read and write from theforest.nostr1.com

Now here is where the fun part is. Nip42, AUTH, whitelisting and read/write rules allows for the relay to isolate the notes just to that relay. Only other npubs that are AUTH can see the notes. You are basically able to isolate notes to one relay and those allowed to see them.

To do so in Amethyst:
-remove theforest relay from outbox
-remove mutiny relay from outbox
-remove nostr.band from outbox
-add theforest.nostr1.com as a general relay with read and write enabled

Then when posting:
-tap the relay symbol at the center top of the screen
-deselect all relays
-toggle theforest.nostr1 relay on
-tap save
-tap post

Now that note is only sent to the forest relay and not to other relays. So it is possible to have an isolated relay of writers and readers if a single relay is used. This is awesome for teams and groups.

( The moment someone is commenting without isolating their relays the note gets sent to other relays.)

I found you can write to citrine and theforest and the note remains isolated.

You can have noswhere as search in general and mutiny in general

Now get your AUTH on! 

 Interesting experiments ongoing at wss://theforest.nostr1.com , Nostr's newest AUTH relay. 👀 

Anyone I'm following can try it out. No entrance fee.

nostr:nevent1qvzqqqqqqypzpmd5wqn399avtfslyalne52du4xx066ue5sw7rva72d7rp59hvqyqqs0fzm47s5h2k8p3h8my9hg9v3rky7l488qsfcshk8lzgy5m967tmqpyjvdj 

 what other clients aside from amethyst work with auth? very interesting! 

 I'm writing from Nostrudel, but only Amethyst does isolated-writing. 

 is isolated-writing where only authorized npubs can write and read, not just write? 

 No, I mean, where you can select which relay to write to in the note. 

 ahh i see. i think coracle also makes that pretty easy. nostrudek good though too cuz you can just bootstrap with the relay and not add anymore. 

 I'm write directly to theforest over the relay.tools client. Just need a browser extension, to login.

https://theforest.nostr1.com/ 

 AUTH is GAY 

 Okay, setup Amethyst like you described, and with Citrine. I'll try it out in a minute. 

 Worked. 👍🏻 

 Also, feel free to use TheForest as your "private relay", in Amethyst, for drafts and application data. Don't want that leaking onto the big, public relays.