Thank you, @heyitsmebev and @alexjanousekGSA, wow! 🎉 This is awesome to see!

I'm really happy with the approach here: it's lightweight and non-obtrusive and wouldn't take much to add other feature flags in the future. 🙂 And you have tests! 🎉

There are two things that I did note that I think we should adjust though, and that's how we're reading in the feature flag environment variable initially and how we use it throughout the rest of the code. I have left an explanation with suggestions throughout the review, hopefully it's easy to follow! If it's not, please ask questions and I'll explain further or find time to pair.

There were a few other things I noted as well but not as critical as that piece. Again, very well done and thank you for incorporating a bit of the sandbox management in there as well! 🎉

Looks good. I think that if we are adding a new feature with new nav, there should be a new e2e test to cover that. This would be a great place to start doing that.

Thank you, @heyitsmebev and @alexjanousekGSA, for making all of the adjustments! 🎉

@alexjanousekGSA I also saw your note about when the environment variable is first read in to the app config as well. It may still be possible to simplify this but you're also right that any non-empty string value in Python evaluates to True when doing a boolean conversion. I see now that the statement that assigns the value to the app config variable is the result of evaluating the equality check of the strings, so I'm fine with it as is for now. 🙂