Sequence dual

Kernel spine: 124875369 + void 0 · digitalRoot(0)→9.

Legacy path: 03691248751 · VBM digitalRoot(0)→0 via adapters.

One structure, read twice — both lines computed, never typed:

forward     1\2\4\8/7/5 · 3\6\9 · 0\1        124875369
reflected   9/8/6/2\3\5 · 7/4/1 · 0\9        986235741

The void tail reflects: 0 is fixed, the trailing unit is not — 0\1 becomes 0\9.

Mirror throughVoid(n) = 1 − n mod 9 — involution fixed only at 5; every pair sums to 10.

Not array reversal (963578421): reversal reorders, the mirror re-values.

Entangled: doubling covers the orbit and its gap is exactly 3,6,9 · D∘M∘D⁻¹∘M = x+1 · |⟨D,M⟩| = 54 against 12 apart (excess 42).

foldVortexReflection().valid: true

See SEQUENCE.md.

Receipt: 9a2f4908-5253-8d22-8541-e24bb372689f · set 0eed975c-2b44-87d3-b56b-3fea8ab14f83