- Wrap cost_usd accumulation in is_wp_error() guard so WP_Error returns from generate_image_a/b don't crash on array access - Add PRAUTOBLOGGER_DEFAULT_IMAGE_STYLE_SUFFIX to test bootstrap - Add is_wp_error, sanitize_title, esc_html__ mocks to ImagePipelineTest Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>