I also found this early discussion helpfull

Solution

Introduce a special format for instance agnostic links (called Lemmy links) that will be opened in the current instance:

for posts: #1@lemmy.world
for users: @ruud@lemmy.world
for communities: [!asklemmy@lemmy.ml](/c/asklemmy@lemmy.ml)

for comments: ~1@lemmy.world

This will open page at https:///post/1, https://lemmy.world/u/ruud, https://lemmy.world/c/asklemmy@lemmy.ml, https://lemmy.world/comment/1 respectively. It will not break existing links functionality as direct HTTP links are still supported.

Bookmark the resource link (or mark this comment as saved on lemmy) for future reference