Christopher Harrison
b3815b0ab3
Adds og:image:width and og:image:height to the global head so LinkedIn (and friends) reliably render the large preview card instead of a tiny thumbnail. The image and the rest of the Open Graph tags were already in good shape, so this is the missing piece. Also adds a website README documenting how the cards work and the gotchas. Co-authored-by: GeekTrainer <GeekTrainer@users.noreply.github.com> Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Awesome GitHub Copilot website
Astro + Starlight site published to https://awesome-copilot.github.com/.
Local development
Run these from the repository root (they generate the data the site needs first):
npm run website:data # generate public/data/*.json from repo content
npm run website:dev # generate data + start the dev server
npm run website:build # full production build
Social preview cards (LinkedIn, etc.)
Shared links render as large preview cards driven by Open Graph / Twitter meta tags.
LinkedIn (and most platforms) read Open Graph — primarily og:image — while Twitter/X
also uses twitter:card=summary_large_image. Most tags are produced automatically:
- Starlight defaults emit
og:title,og:description,og:url,og:type,og:site_name, andtwitter:card=summary_large_image. astro.config.mjs(globalhead) emits the shared image tags:og:image,og:image:width,og:image:height,og:image:alt, andtwitter:image.src/components/Head.astroaddstwitter:title/description,og:image:secure_url,og:image:type, andtwitter:image:alt.
Each page's title and description (StarlightPage frontmatter) flow into the card text,
so keep them clear and benefit-focused.
The image-dimension invariant
og:image:width / og:image:height in astro.config.mjs describe public/images/social-image.png
(currently 2400×1260, ~1.91:1). Crawlers use these dimensions to understand the image and
may use them when selecting/rendering the preview. If you swap the image or add a per-page image
override, update the full image set so every tag stays consistent: og:image,
og:image:width, og:image:height, og:image:alt, and twitter:image (the last one matters
because Head.astro derives og:image:secure_url from twitter:image first).
After deploying
LinkedIn caches scrapes aggressively. To force a refresh and confirm the card renders, run the
changed URL through the LinkedIn Post Inspector.
HTML output alone doesn't prove the live card — verify the deployed image returns HTTP 200 over
HTTPS with Content-Type: image/png and no auth.