nx_nofloat_kda_gate.nx

nx_nofloat_kda_gate.nx -- gate: Kimi Delta Attention, the K3-distinctive behaviors (not just "it runs"). T1 DELTA OVERWRITE: writing the SAME key twice (v1 then v2) OVERWRITES to v2 -- vs plain linear-attn which superposes to v1+v2. This is the delta-rule signature (key-value memory, not accumulation). T2 CHANNEL GATING DECAY: a stored value decays monotonically under repeated per-channel gating (alpha<1). T3 GATE=1 PERSISTENCE: with alpha=1 and no write, the memory is bit-identical across steps (stable). T4 DETERMINISTIC: kda_forward twice = bit-identical (the exceed: float delta/gated stacks drift). T5 FINE-GRAINED (per-channel): two key-channels with DIFFERENT alpha decay at different rates -> the cross-channel magnitude RATIO changes (scalar/GLA gating would preserve it). The KDA-vs-GLA distinction. license_tier: ORIGINAL No hw writes (Rule 26). expect_exit: 0