{"template":{"name":"open-graph-slideshow","description":"Open Graph layout with large background image and slideshow-style text overlays.","aspect_ratio":"40:21","placeholders":[{"key":"accent_color","description":"Accent/highlight color (hex/rgb/hsl)."},{"key":"bg_color","description":"Background color (hex/rgb/hsl)."},{"key":"bg_image_url","description":"Background image URL rendered fullscreen."},{"key":"height","description":"Output image height in pixels."},{"key":"source_image","description":"Source credit for the background image."},{"key":"source_post","description":"Source reference for the post/news content."},{"key":"subtitle","description":"Supporting subtitle or body text."},{"key":"text_color","description":"Primary text color (hex/rgb/hsl)."},{"key":"title","description":"Main title text shown prominently."},{"key":"username","description":"Account username displayed in the top area."},{"key":"width","description":"Output image width in pixels."}]}}