Extension Chaining, Reference Expansion, and Additional Context are now generally available

13 August 2026

HTTP API

Announcement

ExtensibilityGraphQL

Extension Chaining: declare dependencies between Extensions so that each Extension receives the resource state after all its ancestors' update actions have been applied.
Reference Expansion in API Extensions: configure expansion paths to have references in the Extension payload expanded before delivery.
Additional Context in API Extensions: include supplementary information in Extension payloads, such as the previous state of the updated resource.