---
id: SG-11
family: RT-SG
level: extended
profiles: [runtime]
posture: normative-target
added: "1.0"
changed: "1.0"
source: https://flowdrop.io/spec/rules/rt-sg/sg-11
specification: FlowDrop Workflow Specification 1.0-draft
licence: CC BY 4.0
---

# SG-11 — Every node completion writes a checkpoint, and the run writes a last one

*RT-SG (Part II) · level: extended · profiles: runtime · added in 1.0*

## The rule

> **Normative.** This is the rule.
>
> 1. A run writes a checkpoint as each node completes, each chained to the checkpoint before it, and a final checkpoint named `workflow_end` when the run ends.
>
> 2. An implementation offers at least an ephemeral checkpoint store, which lives no longer than the request that created it, and a durable one, which outlives it.
>
> 3. A run that asks for a checkpoint store the implementation does not know is refused.

## Related rules

- Names: SG-12
- Referenced by: SG-12

---

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.