Rereading the discussion, I think I mis-tweaked the language (and missed that the first line in the paragraph also needs tweaking) in #400.
Note that by posting an empty body, the client is not making any conformable request.
I think this would be a better conclusion, fixing the whole paragraph.
summary: Participate in an exchange. Posting an empty body to start
the exchange will result in a Verifiable Presentation, a Verifiable
Presentation Request, or a 4xx error.
https://github.com/w3c-ccg/vc-api/blob/5d12fbef8c86c9c355ea81fefd0fcde63ee0fd36/exchanges.yml#L134-L136
Rereading the discussion, I think I mis-tweaked the language (and missed that the first line in the paragraph also needs tweaking) in #400.
Note that by posting an empty body, the client is not making any conformable request.
I think this would be a better conclusion, fixing the whole paragraph.
Tagging @wes-smith @msporny @dlongley