Dependency-graph recalculation for Go — topological recalc, dirty propagation, cycle detection. The layer expression evaluators leave out. Zero dependencies.
Bitemporal entity change history for Go — valid time and transaction time, ORM-agnostic over database/sql. Know what your data was, and what you believed it was.
Notification digest & batching for Go — group many events per recipient into one batched notification, on a window you control. Pure, zero dependencies, no delivery, no infra.