🚀 go-pugleaf

Gilda,

I'm assuming the following -

For your "combined" heading A123 - DESC, that:
 - HeadingRunIn is for the "A123" code part
 - Heading1 is for the "DESC" description part.

In your chapter documents, set the HeadingRunIn code paragraph to have
a run-in property and also set the "Default Punctuation" to include
the dash. Also set the "Next Pgf Tag" to have the Heading1 tag for the
description part (makes entry faster).

Set (or leave as is) Heading1 to your requirements.

Your cross-refs for the code" would go to the HeadingRunIn paragraph.
There won't be any dash to pick-up as it's not part of the entered
text.

In your TOC, ensure that the "HeadingRunInTOC" paratag is also set to
be Run-In and includes the dash for the Default Punctuation.

For the Heading1TOC paragraph, set the tab position and dot leader as
required.

On your TOC Reference Page, edit the entry for the HeadingRunInTOC
paragraph to remove the <$pagenum> building block. Also edit the
Heading1TOC to insert a tab between the <$paratext> and <$pagenum>
building blocks.

Regenerate the TOC. 

This should give you a combined entry of the code, dash, description
and dot leader to pagenum on the same line, provided that there are no
intervening paratags being picked up between these two.