js conformance.sh walks lib/js/test262-slice/**/*.js (foreign test262
fixtures), escapes each with python3, evals via (js-eval), and compares output
to a sibling .expected file by substring match — counting pass/fail in bash
against a >=50% target. It loads no SX test suites and emits no SX counter/dict
scoreboard (no scoreboard.json). The shared driver only epoch-loads SX preloads
and evals SX test suites emitting a scoreboard — it cannot drive a
foreign-fixture-vs-expected comparison harness (same category as
lua/forth/smalltalk). Left conformance.sh untouched; recorded the exclusion.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>