Mercury

(Granted, v0.0.3, beta, YMMV, and all that.) This is wonderful. Once I carefully watched the video on Loom for how to use this, I could reply to a Tweet with a Tweet-thread easily (not directly supported in Twitter itself), go back and reword my Tweets, re-order them, etc. And if I make a mistake, I can delete the Tweet and re-do the thread! I'm looking forward to seeing what block references can do: I couldn't make that out clearly from the proof-of-concept video. Thanks so much!