please could you explain the difference to
https://mods.factorio.com/mod/AbandonedRuins by bilka resp.
https://mods.factorio.com/mod/ZAdv_ruins by iZlovreD
and the advantage of your mod. this would help to decide which mod to use.

As far as I'm aware, both The Ruins Mod and Adventure Ruins are no longer in active development. This mod is a from scratch rewrite taking inspiration from Gangsir / Bilka's project, but doesn't reuse any code or ruins. I'd not seen Adventure Ruins until now, but it seems to be a fork of The Ruins Mod.

However, the current variety of ruins in this mod is limited, so you may want to hold off until more blueprints / functionality are added.

Thank you. I am excited and wish you much success.

It would be great if ruins mods had an API for other mods to add/change ruins "packs" and have custom frequency settings along with them. In other words, there would be one mod responsible for placement, and any number of mods that could integrate with callbacks to introduce new content without having to do any of the specialized logic integrating with the base game.

It would be great if ruins mods had an API for other mods to add/change ruins "packs" and have custom frequency settings along with them. In other words, there would be one mod responsible for placement, and any number of mods that could integrate with callbacks to introduce new content without having to do any of the specialized logic integrating with the base game.

If you're interested in consuming an API like that, would you be able to raise it as a github issue?

Bilka is still maintaining the mod even if he isn't adding to it. You can submit ruins on his github.