Data freshness.
Per-event freshness over the alphakernel parquet store — how many symbols have shards under each event, how many shards total, when the newest and oldest shards were written, and how stale the latest one is. The page polls /v1/data/freshness every 30 seconds. Ingest is run by ak data ingest-polygon (and friends); this page only watches.
For the worst-lag summary on the morning briefing, see /desk. For the data sources backing each event, see /projects/feature-forge.
This page needs the alphakernel HTTP service.
The build environment didn't set PUBLIC_ALPHAKERNEL_URL, so there's no service to read from. The data layer architecture is documented on the system page.