Accept context as positional parameters and also from the standard input

[schneiderfelipe]

This allows the following:

$ echo "(a nice one)." | cligpt Tell me a joke
Why did the tomato turn red?

Because it saw the salad dressing!

What ChatGPT sees is

Tell me a joke (a nice one).

That is, positional arguments come before the standard input, and everything is single-space joined.