A — Matrix (dual-state staircase)
v1 Dual-state
Hollow input cols → solid output cols.
v2 Broken
Dual-state with one intentional interior notch.
v3 Tight
Favicon-tuned: bigger cells, near-touching gutter.
B — Brackets (directional syntax)
v1 Chevron
[ ■ > — output exits rightward.
v2 State-change
3 hollow inputs → 1 solid output, inside [ ].
v3 Balanced
Symmetric [ ■ ] control, retuned ratio.