I think it’s a good idea if it’s somehow clear it’s not part of the documentation. A dedicated shortcode for this would be good, e.g. “This Hugo Forum thread has more insights about this topic …” Pull requests welcome.
You collate the knowledge in the topic, compare it to existing docs and see if it belong there. If so, update that doc. If it seems like it deserves its own page, open a ticket on the docs repo asking for help on where to include it, and then write the doc and add it to the repo.
I was actually asking how a link could be added to the Hugo Documentation pointing to the forum topic for additional information. In a manner consistent with @BEP’s comment.
One possibility may be to add a very small information symbol and link to reference a Forum Topic in the Hugo Documentation.
These links could be programmatically checked for dead links and even stripped out of the documentation all together if the situation dictates.
This would allow people who feel uncomfortable “editing” Hugo Documentation to add reference to a solution they feel adds value or feels the documentation needs clarity.
As the information icons mount up, they could be summarized and added to the documentation by a Hugo expert for continuous improvement.
Certainly, this forum of Super Experts can come up with a good way to link the Hugo Documentation with the Forum Knowledge Base, and make it user friendly.