gh-og-share-images
Made by JeffGenerate GitHub social preview images (1280x640 PNG) via iterative vision-guided refinement. Use when: social preview, GitHub share image, OG image for repo, social card, gh_share_image, preview image.
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What's New with this Skill
1Updates, enhancements, and release notes for this skill.
New: GitHub OG Share Images, social previews for repo links
Generate polished 1280x640 PNG social preview images for GitHub repositories using iterative vision-guided refinement, so a shared repo link shows a designed card instead of GitHub's default banner.
- Generate 1280x640 PNG previews, GitHub's required social preview size, kept under GitHub's 1MB limit (optimized PNG first, then high-quality JPEG)
- Vision-guided iteration: at least 5 passes of generate, view the image, tweak, regenerate, until it looks good as a small thumbnail
- Finds the repo's hero illustration automatically and overlays the name, description, owner, and topic badges; repos without one get a gradient background derived from the repo name
- Tweak table for common problems: subject cropped off, gradient too dark or too light, text covering the illustration, too many topic badges