https://mods.curse.com/addons/wow/keystone-query?comment=1

Kaminaris: Hi, how can i link my keys to guild or party or there is no such functionality?
Me: There isn't; the problem is WoW doesn't allow addons to send formatted chat messages. I could add a command for it, but it would just send plain text instead of an item link
Kaminaris: That would be awesome, I always need to say my guildmates list of my keys when we decide to do some mythic+. That would greatly help.

Plan:

• Replace :key:/:keystone: in a message with a plaintext representation of the keystone, i.e. Dungeon name +level (affixes) (loot ilvl)
• Make a dataobject click event paste the keystone into the current chat. I think this can be formatted?