# Architecture principles whose scope is report

> 3 records

This index as JSON: https://banes-lab.com/json/api/facets/architecture/scope/report

## Entries

- [Single Aggregate](https://banes-lab.com/records/architecture/single-aggregate.md): A rule or precondition that a shared measurement keeps one aggregate, overwritten by each run that can honestly replace it, while a run that cannot streams its verdict instead of writing a second report.
- [Invocation-Keyed Report](https://banes-lab.com/records/architecture/invocation-keyed-report.md): A defect in which a run writes its result under a name derived from how it was invoked, beside the shared aggregate, so documents accumulate that each describe a moment and none the state.
- [Narrowed Aggregate](https://banes-lab.com/records/architecture/narrowed-aggregate.md): A defect in which a run over a narrowed scope overwrites the whole-scope aggregate, so the aggregate reports a smaller population as though it were the whole.