It’s good to point out that part of this audit will be including instructions for each talkgroup on how it’s content is handled.
So, we probably have special clauses for #maiki and #tuna, for instance, that say we get to decide in our categories what happens; I’m presuming that makes sense, if not please point that out. 
For each talkgroup we are gonna discuss it! And we’ll figure out what happens to everything.
There is a redirect index feature in Discourse; one can set a URL to redirect to a new URL. My plan is to merge, bump, edit, forget about, and re-audit one day, until a piece of content is ready to go live somewhere else.
In the case of #maiki, those will eventually move into a read-only archive, probably at maiki.interi.org
, when I’m good and ready. For #logs I thought I might propose a 10-year archive policy: after ten years a post gets frozen and moved to a static archive on a sub-domain (archive.talkgroup.xyz
?).
In the case of #changelog, a lot of those were of use to me years ago, but no longer, and many have no comments. Those that do, their comments are the important thing, and those ought to live elsewhere (unless they don’t, because we don’t need to archive, “Huh.”?
)
This is what I mean by “it depends”. If a piece of content isn’t useful I ask if it can be edited to become useful, or if it can be safely tossed. And of course the applies to the “commons”, not any personal talkgroup which is it’s own thing.
Also, this should be clear for new talkgroups, and especially what I hope will develop: group talkgroups (either private or public), where it is made clear how the posts will be handled.
Aside: we could have #borrowers for tracking a library of items, and a new #buy-nothing
for ephemeral posts that move goods and then auto-delete, as an example of how similar talkgroups can operate on different motives. 
Okay, glad to get that out of my head!