Looks interesting. Thanks! Not sure how I feel about the key being handed to the fetcher (might be great, might be annoyingly verbose). Will have to see what it looks like in practice. (We are going to use feTS [0] or openapi-fetch [1], which are very particular about how the path is assembled)

[0] https://the-guild.dev/openapi/fets/client/quick-start [1] https://openapi-ts.pages.dev/openapi-fetch/