Indeed, that’s what I mean.
You’re right about the numbering changing with new items, but it is not something I mind — since I don’t add other items in these (sub)lists.
Links do work, but I’m not a fan of that workflow (or similar ones) because it’s slightly less efficient with all the jumping around (and additional work to create the links) — especially for big lists of relatively small items. In particular, I usually create the lists by copy-pasting them from an email (with a “1.” format that Agenda immediately recognizes), which is extremely efficient (just paste and it’s done).
Numbering by hand in a checklist is probably the best, indeed. There’s just a minor annoyance when creating the list (from a copy-paste): since the format is understood by Agenda, it removes the numbers when I turn it into a checklist, and I need to re-enter them by hand (not a big deal, but it can take a little bit). And I also really like the cute tiny font in numbering mode
In any case, I agree this is pretty specific, and probably not worth implementing — too narrow use case, which isn’t enough to justify the more complex behavior. So please disregard this topic