Comment by jptlnk

What's 'this', do you mean the command pattern being described? If so, yes - I've used it to great effect, if the code around it is designed properly. It's even amenable to evals if you can write the LLM call as a function that operates on some state:

  (document, input) -> command  
  (document, command) -> document'  
  # assert something about document' relative to document