Preview entry for 2026.9 developer documentation. Coverage is incremental.
This is 2026.9 documentation. Coverage here is incremental: a page exists only where 2026.9
differs or is newly documented. For any other topic, switch to Current (2026.8 and earlier) in
the version selector.
2026.9-specific developer documentation starts here. Pages are added only when 2026.9 differs from
the current developer guides or needs its own write-up. For the current product, see
Developer documentation.The object model is the first of those differences. Today’s
Data Schema is a tree-and-Proxy graph. 2026.9 stores properties
in a columnar store and describes containment, connectivity, systems, and materials as typed
relations.
Object model
Columnar property store and relational layer versus today’s tree-and-Proxy model.
Relations
Named relation types that replace Proxies and nested elements walks.
.NET SDK
Before-and-after Speckle.Sdk examples for the 2026.9 breaking-change surface.
specklepy
Before-and-after specklepy examples for the 2026.9 breaking-change surface.
JS/TS, GraphQL and REST, Viewer packages, Server, Automate, and custom connectors each have a
holding note in this dropdown until those 2026.9 pages land. Use the developer docs under Current in the version selector for those topics.For dates, compatibility mode, Automate SDK bumps, and who must act, see
Data model migration for developers. For a compact before-and-after table, see Compare 2026.8 and 2026.9.
