MG-O27
The inheritance phase. Where the F1 lines come back to Earth.
The inheritance test.
Lineage is the flight that asks the question every prior mission left unanswered: do the changes pass on.
F1 offspring grown on Earth from the Horizon and Catalyst returns become the payload. Lineage flies the next generation through the same orbital environment and measures what survives across two cycles. The mission spec is built around heritability, not exposure novelty.
A flight signature that doesn't pass is interesting. A flight signature that does is a line.
Every change measured on a returning seed lives in two possible categories. Some are somatic — they happened to this seed, in this flight, and disappear when the plant grows out or seeds again. Others are heritable — they persist in the offspring, get fixed in the genome or epigenome, and define a new cannabis lineage.
Only the second kind is the program. Lineage is how we tell them apart.
Almost everything. Naming what isn't.
Lineage is the late-binding flight of the program's first arc. The science only works if the baseline missions have published. The program publishes a full Lineage manifest after Nexus's first dataset is on the record.