I couldn’t open your file because i don’t have your plugin… but…
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ what is this? ^
And this? ^ 
… try to avoid doing so.
You say “octahedral geodesic” but then many of your pictures are from a dodecahedron… what it is then?
You asked, if I understand correctly, for a deployable dome that… become flat?
On the paper @DanielPiker linked (Peter, you liked a paper that cite Kangaroo 
) they say that with straight beams the angle change, but with curved beams the angles are kept:
You starting geode have a double-curved shape.
Making it become flat is the same as “packing pentagons on a plane”: they will deform, the joints will need to tolerate angle variations between the scissors.
Such thing is doable with kangaroo, i guess… but everything is vague for now, to me.
…well, I’ve made another spaghetti mini-monster instead.
It’s something alike the “hoberman sphere” toy… concentrical deployment… for the lulz.
Internal dodecahedron is just to better see the shape and give it some shadows…
dodecahedron geodesic scissor dome.gh (38.0 KB)