#497 A purpose-made GitHub social preview

[Anonymous]

Originally created by: athanclark

Follows [#479]. The repository has no social preview, and the site's link-preview screenshot (social-preview.jpg) shows the editor without naming anything.

platform/icons/github-preview.png: 1280 × 640, GitHub's recommended size, 467 KB (under GitHub's 1 MB limit). It holds:

• the mark and "OpenChronology" in Noto Serif;
• timescale.info;
• the one-sentence definition (#481): "A free, open-source timeline editor for exact dates at any scale, from deep time to fractions of a second, with sources on every event.";
• a strip of the Rome timeline below it, from the labels above the moments to the first row below. It's cut from the site's own screenshot.

scripts/github-preview.mjs draws it with the renderer the site's previews use (Satori, from next/og), in the site's colours, so it can be drawn again after the screenshot or the definition changes. Like the other files in platform/icons/, it's also copied into platform/public/.

After merging: upload it under Settings → General → Social preview → Edit → Upload an image. GitHub has no API for this.

🤖 Generated with Claude Code

https://claude.ai/code/session_011fFY8eruEi1xAkkMBni13B

[Anonymous]

Ticket changed by: athanclark

• status: open --> closed