Farcaster Devs

Is there a way for a client to tag a cast with a flag that prevents other clients from indexing the cast?

Eg. say I'm building Hypercast, and I only want Hypercast to show certain casts. Right now, if a user makes a cast, and it gets sent to hubs, all clients will show this cast by default. Is there an alternative?

You could use the parent url or parenthash to tag it

That’s how channels work

Or some part of the cast text as encoding 

Farcaster Product Studio @ https://dTech.vision 💜 in love with tech 🤓decentralization, fitness and oldschool rap 😎

Just a hack to make indexing easier for you

It doesn’t make the cast not show up on other clients

Can you point me to docs? Trying to understand if this would be a hack or not (ie. having an invisible channel for a client)