nx_nofloat_k3stack_gate.nx

nx_nofloat_k3stack_gate.nx -- gate: N-layer K3 stack with Attention Residuals, deterministic AT DEPTH. T1 a 4-layer stack RUNS end-to-end and transforms the input T2 CROSS-LAYER (AttnRes): perturbing the INPUT (layer 0) changes the deep output -- early layers stay reachable through the stack (the AttnRes property; a plain-residual stack would too, but here we also verify the layer-0 contribution is WEIGHTED IN, not washed out, by comparing vs a stack that starts deeper) T3 DEPTH-STABLE: output bounded through 4 layers (no overflow blowup) T4 DETERMINISTIC bit-identical at depth (the exceed: float stacks drift per-layer + compound) license_tier: ORIGINAL No hw writes (Rule 26). expect_exit: 0