Hey I'm looking at ways to make your mod compatible but I can't say I understand exactly what I'm looking at. Do you have plans to implement remote calls so I can hook into your 'grow organs' and 'spread creep' logic?

Yes — this is now planned and I’ve started exposing it in the 1.6.x rebuild line.

The first compatibility API is a runtime remote interface named biter-born. It focuses on the new Bio-Engine layer, so other mods can query creep saturation/support, place or spread creep in a controlled way, grow registered organs, register existing entities as Bio-Engine organs, and register their own living organ prototypes with BMR / creep-threshold / necrosis metadata.

The first API version is intentionally narrow because the 1.6 rebuild is still stabilizing the first-hour loop. I’m avoiding hooks into deferred 1.3–1.5 systems like assimilation and advanced logistics until those are rebuilt properly.

Basic discovery will look like:

if remote.interfaces["biter-born"] and remote.interfaces["biter-born"].get_capabilities then
  local caps = remote.call("biter-born", "get_capabilities")
end

The docs are included in docs/remote-interface-1.6.2.md.