nx_career_fair.nx

nx_career_fair.nx -- FAIRNESS BY CONSTRUCTION for the career matcher (career ring rung 3; the number-one 2025/26 frontier wave, gapmap momentum 228). The mechanical claim, PROVEN not asserted: MATCH-SCORE is a function of SKILLS ALONE. A candidate RECORD may carry name / gender / age / zip -- the scorer extracts only the skills field, and this gate proves INVARIANCE: records identical in skills but different in every demographic field score BYTE-IDENTICALLY (direct discrimination impossible by construction), while a skills change DOES move the score (sensitivity control -- ignoring everything would trivially "pass"), and skill ORDER does not matter. HONEST SCOPE: this is attribute-blindness; proxy fairness (skills themselves correlating with demographics) is the open research frontier and is NOT claimed here. Record form: name|gender|age|zip|skills-csv. Argless = selftest gate; CLI: score <record> <need-csv>. expect_exit: 0 license_tier: ORIGINAL