Working on https://fevela.me, https://nstart.me, https://njump.me, https://oracolo.me and other inspiring nostr projects. I love to build helpful things that people are pleased to use, mixing tech, design, usability and accessibility.
A random idea to have an robust cross-clients undo-post feature: relays can implement a X minutes (e.g. 5) delay in the actual pubblication of the events, so an user can safely require the deletion (NIP-9) without worrying that the event has been already broadcasted elsewhere. Of course you have to choose a trusted outbox relay, and only use clients that support the outbox model.
Bonus side effect: this promote a slow approach to posting.
@Mazin@cloud fodder