Data engineering

Keep the digits. Keep the history.

A focused reading path from the Builder Notes library.

Data work starts where a convenient response stops. A token view needs to preserve exact quantities while handling incomplete metadata. An event index needs to explain coverage, replay safely, and recover after interruption. These articles focus on that less visible layer between a data source and a trustworthy screen. Use the token guide to separate asset identity from presentation, then use the indexing guide to distinguish observed events from completed processing. Both encourage small, explicit schemas and deliberately awkward fixtures. A clear model is easier to reconcile, export, and maintain than a collection of values whose original context has disappeared.