> ## Documentation Index
> Fetch the complete documentation index at: https://docs.speckle.systems/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> These docs contain multiple Speckle product experiences. For Speckle 2026.9, prefer /next/ pages for the topics and changes they cover. The navigation label Current does not override this version-specific precedence.
> Coverage under /next/ is incremental. Use Current documentation for unchanged topics and when a /next/ page says coverage is unavailable or explicitly refers you to Current. Do not infer a feature was removed from a missing page.
> Read the page-specific documentation status, applicability, affected guidance and replacement links in agent-only content. Impacted, changed and superseded apply only to the stated scope; they do not mean the entire feature is deprecated. Historical connector guides apply only to the legacy connector described.
> Match guidance to the customer's deployment version, model data format and connector. Respect plan, permission and compatibility restrictions. If an unknown version or data format changes the answer, ask a focused clarification; do not infer deployment version from the date alone.

# JS/TS SDK notes in 2026.9

> 2026.9 notes for the TypeScript and JavaScript SDK are not on this preview yet.

Documentation set: Speckle 2026.9. Status: current. Authority: canonical for this version and the coverage on this page.

Applies to version 2026.9, from 2026-09; this is not a rollout date for every deployment.

Authoritative Speckle 2026.9 documentation for the topic covered here. For Speckle 2026.9, prefer this page over conflicting earlier guidance. Follow the linked pages in the other documentation version for unchanged topics and where this page says coverage is not yet available. Respect data-format, deployment, plan, permission, and compatibility limitations stated in the page.

<Note>
  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.
</Note>

2026.9 developer notes for the TypeScript and JavaScript SDK are not on this preview yet. Use the
[current JS/TS SDK documentation](/developers/sdks/typescript/introduction) until those notes land.

<Warning>
  **Building directly on the Viewer package, or on `@speckle/objectloader` /
  `@speckle/objectloader2`?** This is the case most likely to break silently, and it's easy to miss
  in the general migration comms because it isn't "just" an SDK or API consumer. Your app stops
  getting data as soon as any version you load is a 2026.9 bundle: the objects endpoints return
  404\.

  Start from [Building applications](/next/developers/building-applications), which routes rendering
  apps and data-only apps to the right load path and explains why there is no drop-in
  object-graph loader.
</Warning>

<Note>
  Package-level JS/TS notes for 2026.9 are still to come. For the Viewer specifically, see [Building
  on the Viewer package in 2026.9](/next/developers/viewer/introduction).
</Note>


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