nx_sclass_grader.nx

nx_sclass_grader.nx -- HONEST grading of whether a capability is truly S-class EXCEED (operator). This is the Critic applied to the "exceed" claim, and it is deliberately SKEPTICAL because the team has overclaimed before (254 boolean wins -> honest 71; x*45 "exceed" -> a TIE once triangulated vs clang). The bar for S is high and triangulated: S_EXCEED : a VERIFIED head-to-head BEATS the BEST external alternative, AND was TRIANGULATED (raced vs the actual best, not a strawman). beats-but-not-triangulated is DEMOTED to parity (that is exactly how the x*45 overclaim died). A_PARITY : verified, matches the best external. B_BEHIND : verified, falls short of the best external. P_PROCESS : no external head-to-head exists (internal/process/meta capability) -> cannot be S. U_UNVERIFIED: claimed, not measured. license_tier: ORIGINAL Refs: triangulation doctrine; the Critic.