Changelog

What's changing in Sima.

New capabilities, product improvements and important fixes across the Sima builder and platform.

Latest update Publishing is now versioned.October 16, 2026 Read release
New New capabilities
Improved Better existing workflows
Fixed Reliability and corrections
Filter updates

Product updates

Latest first.

Latest Platform update

Publishing is now versioned.

Sima publishing now creates immutable published versions and keeps the live website connected to one explicit active version.

Immutable published versions Explicit live version Shared runtime renderer
New
Immutable publish snapshots

Each successful publish produces a versioned snapshot instead of replacing the previous published state.

New
Active production version

A website now points to one explicit published version that is used when resolving the live site.

Improved
Shared published renderer

Published requests now resolve through the same runtime path before rendering the final page.

Improved
Safer publishing state

The live version is separated from the editor project so ongoing edits do not silently change the published site.

Platform update

Website-scoped authentication arrives.

Published Sima projects can now resolve persistent website-specific users, sessions and roles before the page is rendered.

Site users Sessions Roles
New
Website users

Published websites can maintain their own user identities independently from Sima platform accounts.

New
Persistent sessions

The runtime can resolve an authenticated website user before rendering protected experiences.

New
Website roles

Users can be associated with project-specific roles that become available to the published runtime.

Improved
Identity-aware rendering

Runtime identity is resolved once and passed through the published request instead of being rediscovered by individual components.

Platform update

A clearer path from domain to page.

The published runtime now follows one explicit resolution path from the incoming host to the active version and final page.

Host resolution Route index SSR runtime
Improved
Single active-version lookup

The active published version is resolved once at the start of the published request.

Improved
Compiled route resolution

Published routes are resolved from the compiled version index before page data is rendered.

Fixed
Consistent runtime context

The active version and runtime context stay consistent for the full request instead of being read repeatedly.

How Sima ships

Improvements should make the project easier to understand, not just add more controls.

Sima is built around visual-first workflows, explicit project structure and the principle that generated or automated work should remain editable afterward.

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