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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
We needed specialist subject matter experts in the domain to design the workflows working with behavioral science experts to author the payload text in each message. But getting a BPMN diagram into a final, computable form that passes validation checked (aka linting) requires software engineering skills and so we started out with the SME drawing an initial BPMN in Camunda’s web tool then the engineer pulls the into Camunda Modeler to do their part to make the workflow executable. The diagrams are in source control and version control is vitally important as we gathered feedback and tweaked the behavior of the system to do a better job of nudging the behavior of the humans it was interacting with.