For Vuclanus start, it looks like LDS's crafting recipes are intended to be moved to the LDS technology:

utils.add_recipes("low-density-structure", {"casting-low-density-structure"})

But that recipe isn't removed from the foundry technology, so it's unlocked very early (and now there are two unlocking technologies). Is this a bug?

version 1.1.28

I guess so, though it doesn't really affect much gameplay-wise since you still have to research LDS to do anything with it really.
Either way, thanks for the report, fixed in 1.1.30

thanks for your quick responses and updates! I'm depending on this mod for my Archipelago integration for Space Age, and so the precise availability of LDS recipes is relevant to the randomizer logic. (details here: https://github.com/thejoshwolfe/Archipelago/releases )

This mod has proven to be an excellent baseline for building random planet start into the Archipelago experience. :100:

Ah very nice, love seeing archipelago in Factorio.

I'm not in a hurry or anything, but based on the speed at which you released 1.1.29 yesterday, could it be that you forgot to publish 1.1.30?

Huh, I swear I did, not sure what happened there. Thanks for the reminder either way.