# Non-Functional Requirements

<!-- guide: Only measurable constraints that change design or verification.
     Each row needs a threshold and a way to measure it. Remove guides. -->

| ID | Category | Requirement | Threshold | Measurement / evidence | Rationale / source |
| --- | --- | --- | --- | --- | --- |

## Constraints Without Thresholds

<!-- guide: Constraints that are real but not measurable yet; state why and who
     decides the threshold. -->

## Open Questions