nx_coder_fidelity_gate.nx

nx_coder_fidelity_gate.nx -- L3b: MEASURED coder-weights bring-up (float ref vs 100%-integer tower, same coder GGUF, greedy). The load-bearing L3b claim is NOT "bit-faithful to float" (greedy argmax flips on near-ties and compounds -- expected) but: the coder weights LOAD and GENERATE COHERENT code through the integer tower, the config is sound, and the integer tower is deterministic by construction. Float-match is NOT the forge ground truth -- the compiler is. Both runners wrote knowledge/forge/coder_gen_{f32,nf}.txt (2 lines: "GEN p1 ...text=[..]" /p2). PASS on: both PRODUCED coherent output AND p2 text byte-exact (proves arch+config+tokenizer+ dequant all correct -- if eps/rope differed, p2 would also diverge) AND mutation negctl caught. REPORT (not gated): p1 text exact? + p1 text longest-common-prefix (the honest divergence depth). license_tier: ORIGINAL expect_exit: 0