[patrickthebold]

Maybe I misunderstood your claim, but there is: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Tr...

Which seems to be what you need to send 'headers' after a chunked response.

[88913527]

You understood correctly; I was mis-informed. Today I learned about the "Trailer" header. I'm curious how HTTP clients handle that. A client like window.fetch will resolve with a headers object-- does it include the trailers or not? I'd have to test it out.