I 've been using emacs + auctex for years and they work fine with ConTeXt:
I modified the \etc\environment file as:
OSFONTDIR="/usr/share/fonts;/home/fvleung/.fonts"
PATH="/home/fvleung/ConTeXt/tex/texmf-linux-64/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games"
I added the following in the .emacs file:
;; ConTeXt mkiv
(eval-after-load 'tex
'(add-to-list
 'TeX-command-list
 '("ConTeXt mkiv" "context --nonstopmode %t"
   TeX-run-command nil (context-mode) :help "Run ConTeXt mkiv")))

Gour <gour@atmarama.com> 於 2019年2月15日 週五 上午6:05寫道：
On Wed, 24 Oct 2018 15:30:37 +0200
"Jan U. Hasecke" <juh+ntg-context@mailbox.org> wrote:

> I hope there are some Emacs users out there. ;-)

I also wonder about the current quality of ConTeXt support within Emacs?

In the past Patrick did some work on it, but, probably, atm he is busy with
Speedata Publisher...


Sincerely,
Gour

--
Therefore, without being attached to the fruits of activities,
one should act as a matter of duty, for by working without
attachment one attains the Supreme.


___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : http://contextgarden.net
___________________________________________________________________________________