nx_ledger_data.nx

nx_ledger_data.nx -- LEDGER-AS-DATA (rung AN1): an Analyst case is a .led FILE, not code. New question = new file, NO recompile (the vizsla archetype-matrix lesson). The file carries SOURCE COLUMNS so the strict source-criticism re-grade is data too: every MEASURED leaf must be backed by >=2 DISTINCT incentive classes or it is DEMOTED to DERIVED before the verdict. Grammar (one record per line; '#'/blank = comment; integers only, space-separated): T <tol_ppm> <min_traced_permil> <max_residual_permil> (exactly one) C <class_a> <class_b> (opposed pair; 0..4 rows) S <rel 1-6> <cred 1-6> <party 1-3> <method 1-5> <class> (source; idx = order) N <parent> <value_cents> <kind 0/1/2> (node; idx = order; node 0 = root) B <node> <src> (backing edge) Any other line, bad field, bad grade, or bad reference fails LOUD (parse returns 0) -- a ledger that cannot be read exactly is never half-answered. Composes nx_analyst (verdict math) + nx_source_grade (grades, independence, confidence). LAWS: struct-free, integer-only, flat ifs, <=6 args (st-table for the parse state). license_tier: ORIGINAL