Preliminaries:

• Shopkeepers version: Latest (2.18.0)
• Spigot version: 3763-Spigot-7d7b241-5a5e43e

• I have checked that my issue/question does not get answered by:
  • The documentation.
  • The FAQ.
  • The Known Issues.
• I have checked all open and closed issues, but none seems to fit my issue/question.

The question: In creating a Player shop. I need the output item to be a command that is run for the %player_name% Is that possible?

Nope. This is on the todo list, tracked by #505

Edit: Can you make a few examples of the kinds of commands you would like to run?