---
id: SG-3
family: RT-SG
level: core
profiles: [runtime]
posture: normative-target
added: "1.0"
changed: "1.0"
source: https://flowdrop.io/spec/rules/rt-sg/sg-3
specification: FlowDrop Workflow Specification 1.0-draft
licence: CC BY 4.0
---

# SG-3 — A node's state update is applied through the reducers once it completes

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

## The rule

> **Normative.** This is the rule.
>
> 1. A node's `state_update` output is applied to the run state through the same field-by-field reducers as any other update, once the node has completed.
>
> 2. It is a control output and is never removed by output exposure, whatever the author exposed.

## Related rules

- Names: SG-1, DATA-8
- Referenced by: SG-1

---

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.