Farcaster lego's explained

Composer action -> launch Mini App -> get back new post
Mini App - do whatever within warpcast and maybe new post or just close
Cast Action -> Launch Frame (or get info in text message)
Frame - do whatever with gameboy style 4 buttons, one display and an input field
Bot - reply to some casts with whatever text or embed (image, frame, link, video ....) you want
App - an application using Farcaster Data like the Social Graph (following, user data) and posts
Direct Messages - direct message someone on Warpcast (not Farcaster generic yet)

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

and this is only for Friends of Dan, right?

Whatever your decentralized, borderless, neutral, censorship-resistant open blockchain question is, the answer is YES… to Crypto!

Fake news. It also includes friends of @randomerror.eth

Pi-chi.eth (she/her) Artist /animeoutcasts
Purple Promoter| Hosting: /moxietools /kyoto /momiji  /anime-manga /farcasterunion

https://portrait.so/pichi

Plot Twist: we're all alts of Dan

Farcaster doesn't exist. 

We are all subroutines he wrote to cast and/or pose problems that have "build your own client" as a solution.