CODE EXAMPLE FOR SHELL

Send iMessage From Command Line With Bash/Osascript (Osascript = Command Line Version Of Applescript)

osascript -e 'tell application "Messages" to send "Message Content" to buddy "Contact Name/Number"'
example:
osascript -e 'tell application "Messages" to send "Hello Fuckface!" to buddy "Andrew"'
osascript -e 'tell application "Messages" to send "Hello Fuckface!" to buddy "5558675309"'