---
id: SCH-38.a
family: GR-SCHEMA
level: extended
profiles: [storage-api, editor-client]
posture: normative-target
added: "1.0"
changed: "1.0"
source: https://flowdrop.io/spec/rules/gr-schema/sch-38-a
specification: FlowDrop Workflow Specification 1.0-draft
licence: CC BY 4.0
---

# SCH-38.a — A retired lane keeps one release of served-but-disabled compatibility

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

## The rule

> **Normative.** This is the rule.
>
> 1. A lane leaves the declarable vocabulary as soon as nothing ships it, but leaves the served payload only a major version later, because the two lists answer different questions: what a port may newly declare, and what an editor knows how to connect.
>
> 2. Dropping both at once breaks every edge on a port declared under the previous release, with no error anywhere; an editor simply reports the connection incompatible.
>
> 3. A retired lane is therefore served disabled, with its compatibility rules intact, for at least that release, and the retired lanes are named explicitly so that removing one is a deliberate act rather than drift.

## Related rules

- Names: SCH-38
- Referenced by: SCH-38

---

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.