Aspect ratio: 16:9 — locked in as the standard for all UBI Works blog post thumbnails. [Source: Ken Yang via Hugh session 2de46c77, 2026-06-04]
Style: photorealistic, cinematic lighting, no text. Warm/grounded/hopeful mood for cash-transfer / housing posts.
Generation route: image_generate with openrouter/google/gemini-3.1-flash-image-preview (note: ignores quality=high override).
Deployment route: pass the public image URL into the Webflow CMS thumbnail field on item create — Webflow re-fetches and re-hosts it on its own CDN automatically. No assets:write scope required. [Source: Hugh session 2de46c77, 2026-06-04]
Reference Implementation
2026-06-04 thumbnail iterations for the New Leaf Project blog post — see agent-webdev-and-content (Webflow Deployment section). Final version: Indigenous man, beanie, groceries, BC Housing entrance, North Shore mountains, autumn leaves, bicycle.