So, it's just changing the problem up a level.

First, is a 500 because you are using the API in a way that is unexpected a customer found defect? If Claude can't find the answer, what is the expectation of support?

If an internal team makes a change that breaks your workflow (because it was an unexpected use case), is that a CFD?

Do teams slow down in new features because the API must be the stress test of a public api?

I'm fine with unsupported frontends but an external API will be very difficult to keep static.