IMPECCABLE_CARD_BASE overrides the quality-bar URL prefix so eval
workers serve cards from the local checkout while impeccable.style
stays undeployed. IMPECCABLE_QUESTION_DISABLED makes serve-question
exit immediately with the structured-question fallback line, so
headless workers never block on a browser page nobody will answer.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>