The Wikimedia feed's thumbnail is 330px, which upscales blurry in our hero. Use
originalimage.source instead — it's reliably sharp. (Can't just request a bigger
thumbnail width: for very large source images Wikimedia only serves pre-generated
bucket sizes and 400s on arbitrary widths — e.g. 500px ok, 800/1024px fail.)
- onthisday._best_image() prefers originalimage, falls back to the thumbnail.
- scripts/otd_image_upsize_backfill.py re-fetches each stored MM-DD and upgrades
image_url in onthisday_pool + daily_onthisday in place (ran on host: pool + 6
daily rows now sharp; today's hero verified 200). Only the /onthisday hero
loads this image (home card is text-only), so larger files are a single-page,
one-time load.
- test_best_image locks the prefer-original/fallback behavior.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
thejayman77
6c10ad99a9