nx_bench_dist_persist_test.nx

nx_bench_dist_persist_test.nx -- run distribution + persist to disk. Composes the distribution measurement primitive with the disk-write persistence primitive. Produces a REAL TSV file at /tmp/nx_bench_dist.tsv containing one header + N data rows + summary stats. This is the substrate-honest end-to-end workflow the s-class comparison campaign needs: measurement happens, bytes hit disk, external tools (sort / awk / future llama.cpp comparison rigs) read the file and diff against their own. After the smoke runs, the operator can: cat /tmp/nx_bench_dist.tsv sort -k7n /tmp/nx_bench_dist.tsv awk -F'\t' '{print $1, $8}' /tmp/nx_bench_dist.tsv And see real persisted substrate measurements.