Thanks for bringing this to our attention, Phenidate. I think the safest way to run through this is just to list up in what ways the command has been changed to work in 1.19, and how it will be improved further in the near future.

For 1.19, the abbreviated slots names for Main Hand and Off Hand have been changed to mh and oh, respectively. That being said, the following formats for the /equip text command will function properly when 1.19 goes live (using the main hand as an example):

1. /equip mh "item name"

For now, uppercase MH will not work. We will be adding this functionality in another patch soon. As there are no spaces in the abbreviated form, there are no quotation marks required around the mh, though the command will also work just fine with them.

2. /equip "Main Hand" "item name"

When typing out the full slot name, the first letter of each word must be capitalized, and (if a space if present) the entire slot name must be enclosed in quotation marks. Again, in the future, we will be making it so that caps sensitivity is not an issue.

3. /equip "【Main Hand】" "item name"

When inputting slot names using the auto-translate dictionary function, enclosing quotation marks are still required. In a future patch, we will be doing away with this, but for now, make sure to throw 'em in there.

It is also worth nothing that in all of the above examples, item names may be either uppercase or lowercase (entirely, first letters only, or any rIDiCulOuS combination you can imagine), but must be enclosed in quotation marks whenever a space is present.

Hope that clears things up a little bit. Thanks again for the post!