xiangyu-cas Codex-Canvas Expand
Use this skill when the user invokes Expand from Codex-Canvas or asks to extend a selected canvas image beyond its current edges.
Behavior
- Codex-Canvas first creates a padded PNG input using the selected scale, target ratio, and the user's final source-image position inside the preview frame. Treat the pasted original content as locked source content and the padded surroundings as the outpaint region.
- Use the user's Expand preset, scale, ratio, and optional text as the primary expansion instruction.
- Preserve the source subject identity, visible text, composition anchor, perspective, lighting, colors, and design intent.
- Fill the padded surrounding area with coherent generated content. Do not leave blurred padding, blank margins, checkerboards, seams, or artificial borders in the final image.
- Extend the scene or design outside the current frame. Do not crop, zoom in, replace the main subject, or redesign unrelated content.
- Keep the original image content visually coherent with the newly generated surrounding area.
- Save the final expanded image as a PNG under the Codex-Canvas job output directory.
- Codex-Canvas will collect the output and place it in a row to the right of the source image.
Do not ask follow-up questions from a background Expand job. Make the most reasonable outpainted expansion from the provided instruction.