b8d2f4a6c091 was NOT the production head. The true head was 064 (064_normalize_script_builder_messages) via the chain: b8d2f4a6c091 → f0aad74ea51b → 062 → 063 → 064 This caused 'multiple head revisions' on Railway deployment. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>