Okay, I found a part of the PopulationDefinitions - all the named ones, that is:

"Endless Space 2\Public\Simulation\PopulationDefinitions.xml"

It does contains all the pre-scripted Major and Minor Populations. There even is the entry for the case you pick a Random Empire. But I found no way to subfilter on specific case of Minor.

I did have a theory regarding Chain Gang however:
It has to reduce the System Growth, because otherwise the game would instantly grow a new Population. Growth decides the total count. And it is the Relation of GrowthStorage and Population using Growth that forces the spawn/removal of a pop.
Maybe it could work if I at the same time remove 300 Growth and a Specific Species pop? That way I could maybe control wich Pop vanishes (Original or non-Original).

Minors and conquered Major populations can be targeted with the option PopulationSource="Minor" in any population transforming improvement. I made a mod about this recently, if you want to check it out or get a look at the code :

Wrath of the Righteous (Workshop)

You can add population sources with tags for some of your ideas, but I don't think you can tag "already spliced" or stuff like that because it's in the hard code, but I may be wrong. To quote MonAmiral from the Discord on pop improvements :

You can set PopulationSource & PopulationDestination to : 

- Nothing: it'll ignore the addition/removal of population 

- Major: it'll select the major population 

- Minor: it'll select from all the minor populations, using the PopulationXXHeuristic you selected 

- AffinityXX: the selected affinity 

- Tags that are applied on populations: it'll select from all the populations with the provided flag

I'm afraid most of what you ask for in your idea would require coding on Amp's part, but what you can already do is make a a "gulag" system where you send all your unneeded populations and keep queuing chaing gang program, or if you have my mod, queuing "The Hunt" to remove any number of minor or captured major pop in one turn.

Hope this helps.

Kuma wrote:

Minors and conquered Major populations can be targeted with the option PopulationSource="Minor" in any population transforming improvement. I made a mod about this recently, if you want to check it out or get a look at the code :

Wrath of the Righteous (Workshop)

You can add population sources with tags for some of your ideas, but I don't think you can tag "already spliced" or stuff like that because it's in the hard code, but I may be wrong. To quote MonAmiral from the Discord on pop improvements :

You can set PopulationSource & PopulationDestination to : 

- Nothing: it'll ignore the addition/removal of population 

- Major: it'll select the major population 

- Minor: it'll select from all the minor populations, using the PopulationXXHeuristic you selected 

- AffinityXX: the selected affinity 

- Tags that are applied on populations: it'll select from all the populations with the provided flag

I'm afraid most of what you ask for in your idea would require coding on Amp's part, but what you can already do is make a a "gulag" system where you send all your unneeded populations and keep queuing chaing gang program, or if you have my mod, queuing "The Hunt" to remove any number of minor or captured major pop in one turn.

Hope this helps.

It helps a lot. Now I know what the limits are. I guess for the Splicing/Unspliced differentiation, I would have to add 1 Transform for each hardcoded species.

I need to look into the Splicing mechanic, to see if there is any way to figure out of "AffinityVenetian" has already been spliced.