ModelioOpenSource
BPMN Diagrams with Claude AI (lanes, events, tasks, flows and layouts)
🚀 Programmatically Generating BPMN Diagrams in Modelio (With Jython + Template)
After extensive experimentation, I’ve developed a reliable method to generate BPMN process diagrams programmatically in Modelio using Jython macros.
This post summarizes the key findings and provides a ready-to-use template.
📎 Resources
🤖 Using the Template With Claude AI
Once you place the template in your Modelio macro folder, you can simply ask Claude:
“Create a BPMN diagram for an expense approval process with Employee, Manager, and Finance lanes.”
Claude will generate a complete macro, including:
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Lane definitions
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Tasks, events, and gateways
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Sequence flows (with labels)
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Automatic layout positioning
▶️ Running the Script in Modelio
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Copy the generated macro into the Script view.
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Select a Package in the browser.
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Run the script.
Done!
📦 What the Template Supports
The template solves the usual Modelio macro quirks and provides:
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✔️ Modelio 5.x compatibility
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✔️ Unlimited lanes
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✔️ User Tasks, Service Tasks, Events, Gateways
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✔️ Automatic flow generation
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✔️ Configurable spacing & lane alignment
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✔️ Clean, reusable structure for AI-generated macros
🎉 Happy Modeling!
With this template + Claude, creating BPMN diagrams becomes ridiculously easy and scalable.
Perfect for complex workflows, fast prototyping, or teaching BPMN.
