NIP here! https://gitlab.com/chad.curtis/lief/-/blob/main/NIP.md?ref_type=heads And nostr:npub1scvyzz02ayma34hesz62pdrd5nhsmxp74hjq8msmfs9khh3r3drsnw68d8 also built a dedicated client, Lief, to demonstrate the Letters separately from Ditto if any other clients want to add this! https://lief.to/