---
id: SCH-14
family: GR-SCHEMA
level: core
profiles: [storage-api, editor-client]
posture: normative-target
added: "1.0"
changed: "1.0"
source: https://flowdrop.io/spec/rules/gr-schema/sch-14
specification: FlowDrop Workflow Specification 1.0-draft
licence: CC BY 4.0
---

# SCH-14 — Every executable node gets a hidden error output

*GR-SCHEMA (Part I) · level: core · profiles: storage-api, editor-client · added in 1.0*

## The rule

> **Normative.** This is the rule.
>
> A reserved `error` output port is injected on every node type except a non-executable one, carries display order 120, and ships hidden.

## Related rules

- Names: SCH-16
- Referenced by: SCH-16

---

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.