AppleScript for lazy developer on a Mac: opens multiple terminal tabs, run a set of commands on each tab

lazy_script.scpt

-- This script...
-- It assumes when you ssh into the vagrant box you automatically cd into
-- the project's directory (by having a `cd /vagrant` within your
-- `~/.bashrc` for example)

using terms from application "Terminal"
	tell application "Terminal"
		activate
		
		-- open the terminal's window, set its dimensions		
		set tab1 to do script
		set currentWindow to front window
		set position of currentWindow to {1740, 60}
		set number of rows of tab1 to 40
		set number of columns of tab1 to 190
		
		-- start the vagrant box, wait until it's up to continue
		do script "dev-avdice" in tab1
		do script "vagrant up" in tab1
		repeat
			delay 0.5
			if busy of tab1 is false then exit repeat
		end repeat
		
		-- tab 1: ssh in vagrant
		do script "vagrant ssh" in tab1
		delay 0.5
		
		-- tab 2: ssh in vagrant and run spork
		tell application "System Events" to keystroke "t" using command down & return
		set tab2 to tab 2 of currentWindow
		do script "dev-avdice" in tab2
		do script "vagrant ssh" in tab2
		do script "bundle exec spork" in tab2
		delay 0.5
		
		-- tab 3: ssh in vagrant and run rails console
		tell application "System Events" to keystroke "t" using command down & return
		set tab3 to tab 3 of currentWindow
		do script "dev-avdice" in tab3
		do script "vagrant ssh" in tab3
		do script "bundle exec rails console" in tab3
		delay 0.5
		
		-- tab 4: ssh in vagrant and run spork
		tell application "System Events" to keystroke "t" using command down & return
		set tab4 to tab 4 of currentWindow
		do script "dev-avdice" in tab4
		do script "vagrant ssh" in tab4
		do script "bundle exec rails server" in tab4
	end tell
end using terms from

Added missing part to set window's size

modify the .profile of the box it's more simple