> Alan BRASLAU <mailto:alan.braslau@cea.fr>
> 2. August 2015 09:11
> On Sat, 1 Aug 2015 17:35:38 -0600
>
> Hello Idris,
>
> I would think that your only hope in this case would be through the use
> of \startparagraph \stopparagraph, for otherwise TeX does not know
> where a paragraph is to end (only where one begins, through an explicit
> \par or through an implicit blank line).
>
> My guess, untested, would be \setupparagraph[after=\thinrule]

The paragraph environment has no before/after keys and even if it would 
the after key would be normally applied after the paragraph has needed.

Wolfgang