Rules Page 4:
Conifold Field: Creates a brane field, giving three
Hull points and consuming two Energy.
So is it:
A) Gives you three otherwise ordinary hull points but requires two energy.
That doesn't seem all that useful due to taking up a slot on your blueprint and probably requiring you to research one of the more robust power sources.
B) Since it is called Conifold Field
it creates a three hull point shield around a ship that must be knocked down before any further damage spills onto the regular hull and every combat round regenerates a fresh three point shield?
Thematically I would lean toward "B". But for game balance issues I suspect that it's "A".
Perhaps it would have been less ambiguous if it had been named something like "Conifold Reinforcement"...?