Use of bool instead of Literal["yes", "no"]?

[deanwampler]

I'm working through the tutorial. In Using Generative slots to Provide Compositionality Across Module Boundaries, I noticed I could replace the use of Literal["yes", "no"] with bool in both the function definitions that return this type and the conditionals at the bottom of the example that use them, e.g., replacing:

if contains_actionable_risks(m, summary=summary) == "yes":

with this:

if contains_actionable_risks(m, summary=summary):

This is more concise, more consistent with "normal" Python code conventions, and it adds extra type safety. Is there any particular reason for preferring the Literal approach?

Related question: coercing a model to output true or false is pretty easy. Can Mellea (or whatever library it uses...) handle more complex type coercions, like structures?