Corpus & data pipeline
Metric snapshot
A metric snapshot is a single dated record of a tool's numbers (like stars and open issues), appended over time to build a history.
A metric snapshot captures a tool's numeric signals at a point in time and stores them append-only. Collect them repeatedly and you get a time series you can measure change against.
Snapshots are what make "growth" computable: without a history there is no way to say a project gained a thousand stars this month.
In GraphCanon
GraphCanon records metric snapshots during sync so it can compute 30-day deltas - the basis of the momentum (star velocity) signal on trending and tool pages.
See also
Related terms
Last reviewed 2026-07-09