Observed updates

Each record is one immutable version snapshot. The type comes from the timestamps compared when the snapshot was saved. It is not a semantic version, and commit ancestry is not verified.

First seen

The first snapshot saved when the index first picked up a package. There is no previous version.

Revision

An already indexed package saved a new snapshot whose commit time is strictly later than the previous latest snapshot's commit time and later than when the package was discovered. Equal times do not count as revisions.

Backfill

An already indexed package recorded a snapshot whose commit time is not later than its previous latest snapshot, or not later than when the package was discovered. This is catch-up recording of history, not new upstream activity.

Baseline

Versions that were already in the index when observation records were introduced. The observed time is the version's original capture time and there is no previous version. It does not say when the version was published upstream.

Commit time is the time written in the Git commit; authors can set it, so it is only used for classification. Observed time is when the index saved the snapshot.

Package names and repositories are current metadata at the time this page is rendered, not the values at observation time. Version labels and commits come from the snapshots saved then.