- Parse `is X ignoring case` → (eq-ignore-case left right) - Parse `is not X ignoring case` → (not (eq-ignore-case left right)) - Compiler: eq-ignore-case → hs-eq-ignore-case - Runtime: hs-eq-ignore-case using downcase/str Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>