This adds the /r command which replies to the last person that whispered to you.
For example, if in chat it says,
Blueishberry whispers to you: Hello!
Then, you could use
/r Hello to you as well!
and it would send that message to Blueishberry.
External resources
Project members
Blueishberry
Member
Technical information
License
MIT
Client side
unsupported
Server side
required
Project ID