Two files provided can be used to individualize the open and close actions for each character.

Simply create copies of these files for each character and replace charname with the name of the character you want to script actions for.

When the harvest bar is opened, actions is the charname_harvest_on.txt will activate.
When the harvest bar is closed, actions is the charname_harvest_off.txt will activate.

You can use these to equip harvest bonus items, buffs, and tool refresh etc.
Use the off file to re-equip items that may have been removed during harvesting.

Any action that can be performed by entering into the chat window should be performed.

The included files have some basic starting data, for example in

charname_harvest_on.txt

inventory equipvdl -1341370948 ;equips Cloak of the Harvester
inventory equipvdl -642327463 ; equips Earring of the Solstice
use_equipped_item 11 ; activate the Earring of the Solstice

To find equipvdl values, go to sites such as www.lootdb.com and enter the name of the item.

You should see a value on the screen such as

\aITEM -642327463 -1630209615:Earring of the Solstice

The first number you see is the itemvdl or equipvdl.

There are two versions of the Harvest Bar provided.  The default, which works for Fetish and Default and the Profit version.
To use the Profit version, just remove the .Profit from the end of the filename and copy it into your UI directory.