---
id: INT-9
family: RT-INT
level: extended
profiles: [runtime, storage-api]
posture: normative-target
added: "1.0"
changed: "1.0"
source: https://flowdrop.io/spec/rules/rt-int/int-9
specification: FlowDrop Workflow Specification 1.0-draft
licence: CC BY 4.0
---

# INT-9 — One execution has at most one stored snapshot

*RT-INT (Part II) · level: extended · profiles: runtime, storage-api · added in 1.0*

## The rule

> **Normative.** This is the rule.
>
> 1. Storing a snapshot is an upsert keyed by execution identifier: an existing record for the same execution is overwritten in place, so one execution never accumulates two snapshot records.
>
> 2. Cleanup deletes records created before a given time and, where a set of statuses is given, only those whose status is in it, answering with the number deleted, zero when nothing matches.
>
> 3. Access to a snapshot is enforced at the API boundary and enforced once there, not repeated by the layer that stores them.
>
> 4. A scheduled cleanup runs with no principal and deletes on the predicate above alone.

## Related rules

- Names: INT-6
- Referenced by: INT-6

---

Rule identifiers are permanent and are never renumbered. This specification carries
no implementation status: each implementation publishes its own standing against
these rules. Licensed CC BY 4.0.