Lich, like PsiNet before it, includes a chat function that operates in the Thoughts window. LichNet does a bit more than just chat, however, and can be used for all kinds of goodies.
To see a list of LichNet commands, use the command
With LichNet you can ;chat to the general channel. You can ';chat to <player>' to chat directly to another user (like the ' speaking syntax of GSIV, ;chat:: also functions as a chat to command), ;ignore someone, ;tune to a channel and even ;lnet create your own channel.
LichNet goes beyond chatting, however, and can be used to query and display all kinds of relevant information about a player. Some of the most useful functions are:
;locate <name> - show someone's current room ;spells <name> - show someone's active spells and time remaining ;skills <name> - show someone's skills ;info <name> - show someone's stats ;health <name> - show someone's health, spirit, stamina and injuries ;bounty <name> - show someone's current adventurer's guild task
Using these commands, other players have the ability to find dead characters and fog to you faster. Your questions about character builds can be answered quickly and in game by showing your information to another player.
But, before anyone can see your information, you must set LichNet to make your information visible. To do this, use the command
;lnet allow all all
This will allow ALL players to see ALL of your information.
Many scripts require information gathered from your LichNet data to function properly. It is generally a good idea to allow all information to be viewable.