By name: image-background description: "Author a gpt-image-2 full-bleed abstract/ambient background prompt and hand off to codex-image-gen. Triggers: background art, abstract backdrop, ambient gradient art."
Image Background
Follow the conventions in image-craft-base; this skill specializes them for full-bleed abstract and ambient backgrounds.
Key Move
Reserve a dark quiet zone for overlaid UI text by naming it in the prompt (e.g., "quiet dark lower third for text overlay"). Explicitly include "non-repeating" and "do not tile" in CONSTRAINTS — a background that accidentally tiles looks broken on wide viewports.
Failure Modes to Prevent
- Competes with foreground UI — high-detail or high-saturation content across the full frame destroys readability of overlaid text, icons, and controls. Reserve quiet zones by name.
- Accidental tiling — without an explicit
non-repeatingconstraint, the model sometimes produces edge-matched patterns that tile. State it explicitly.
Default Size / Quality
2560×1440 / medium
Sample Cue
"Full-bleed ambient aurora gradient, quiet dark lower third for text overlay, non-repeating, low saturation, soft horizontal bands, palette #0D1117 deep dark / #1A3A5C midnight blue / #0E6E55 muted teal, no focal objects, no text."
Handoff
Build the 5-section prompt per image-craft-base, then pass it to codex-image-gen. If the background will sit behind live UI text, remind the user to screenshot the composed result — an image that looks fine alone can destroy legibility behind a headline.
See codex-image-gen for auth check, cost go-ahead, the codex exec -s workspace-write run, and the look-at-the-output verification step.