Modeler Release 5.3

Released on: 2026-07-13

This Modeler release is only for the Modeler. Runtimes are not affected. The fact remains that using new features or new expressions may cause issues when they are used in Runtimes that do not support the specific feature. In most cases the Runtime should show a friendly, informative message about non-supported feature, but in some cases it may display a technical error.

Warning: If new features introduced in this release are used while an old Preview is still active, hard crashes can occur. Use Conditionals and Decision nodes to exclude new features from being accessed in an old Preview.

The new Preview environment is always kept up to date with the latest Runtime release and supports the new Modeler features without issues.

Highlights

• A new Settings folder in the data model lets you define application settings with optional default values, override them per-environment in the DevOps dashboard, and mark sensitive values as secrets so they're never shown in the modeler.

• New deprecated/retired model warnings help you spot and fix AI agents using models that are being phased out, both in the Publisher overlay and directly in the project tree.

• Several new text expression functions.

• Various stability and security hardening improvements.

New features

• Settings folder in data model: define application settings with an optional default value directly in the modeler. Values can be overridden per environment in the DevOps dashboard. Settings can be marked as secret, which prevents their value from ever being shown in the DevOps dashboard.

• Model lifecycle warnings: the Publisher overlay now shows a warning for deprecated models and an error for retired models still in use. The project tree also flags any AI agent using a deprecated or retired model.

• Force file downloads option: added an option to force files to be downloaded rather than opened in the browser.

• Android app icon SVG and PNG support: you can now select either SVG or PNG file formats when setting an Android app icon.

• New text expression functions: Left(string, num_chars), Right(string, num_chars), and Reverse(string).

Improvements

• Added the option to give a form field a RequiredMessage expression in the template editor, so you can show a custom message when a required field is missing.

• Added a Height property for the ProseMirror editor area.

• Dropdown button options can now be created directly from the project tree.

• Added the option to exclude specific HTTP endpoints from the generated OpenAPI specification.

• A "Save all templates" prompt is now shown when there are unsaved template changes before publishing.

• Navigation item edit/create overlays now include query string parameters.