diff --git a/.github/social-preview.png b/.github/social-preview.png
index a08504e6..12ed53ee 100644
Binary files a/.github/social-preview.png and b/.github/social-preview.png differ
diff --git a/assets/README.md b/assets/README.md
index 6a297c70..3582faa0 100644
--- a/assets/README.md
+++ b/assets/README.md
@@ -12,3 +12,6 @@ symbol comes from the [upstream logo](https://github.com/modelcontextprotocol/mo
 Package-specific artwork sits beside its README where the package format
 supports it. `.github/social-preview.png` is the cog sharing card, ready to
 upload under the repository's **Settings → Social preview**.
+
+The sharing card comes from `assets/ruby/library/opengraph-light.png`
+at kit revision `4b86a9d9158d7c6d52cd635d59c92a04b48b960f`.