> For the complete documentation index, see [llms.txt](https://docs.stackai.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.stackai.com/guides-and-quickstarts/workflow-builder.md).

# Workflow Builder

Workflow Builder connects inputs, processing steps, and outputs on a canvas. Use it when you need to control how information moves through an application.

These guides explain models, variables, structured outputs, routing, loops, reusable project calls, and code. They also cover files, audio, tables, memory, and triggers.

Use execution details to inspect the values each step receives and returns. Configure failure handling according to the behavior users need when a step cannot complete.

### Guides in this section

* [First input to output workflow](/guides-and-quickstarts/workflow-builder/first-input-to-output-workflow.md)
* [Configure models and prompts](/guides-and-quickstarts/workflow-builder/configure-models-and-prompts.md)
* [Map variables and expressions](/guides-and-quickstarts/workflow-builder/map-variables-and-expressions.md)
* [Structured outputs and templates](/guides-and-quickstarts/workflow-builder/structured-outputs-and-templates.md)
* [Conditional and AI routing](/guides-and-quickstarts/workflow-builder/conditional-and-ai-routing.md)
* [Loops and reusable project calls](/guides-and-quickstarts/workflow-builder/loops-and-reusable-project-calls.md)
* [Compare the StackAI Project and Beta nodes](/guides-and-quickstarts/workflow-builder/compare-the-stackai-project-and-beta-nodes.md)
* [Code execution](/guides-and-quickstarts/workflow-builder/code-execution.md)
* [Document, image, and URL processing](/guides-and-quickstarts/workflow-builder/document-image-and-url-processing.md)
* [Audio input and output](/guides-and-quickstarts/workflow-builder/audio-input-and-output.md)
* [Tabular data workflows](/guides-and-quickstarts/workflow-builder/tabular-data-workflows.md)
* [Conversation memory](/guides-and-quickstarts/workflow-builder/conversation-memory.md)
* [Triggers and scheduled and event runs](/guides-and-quickstarts/workflow-builder/triggers-and-scheduled-and-event-runs.md)
* [Workflow debugging and node results](/guides-and-quickstarts/workflow-builder/workflow-debugging-and-node-results.md)
* [Error handling and fallback branches](/guides-and-quickstarts/workflow-builder/error-handling-and-fallback-branches.md)
* [Canvas organization](/guides-and-quickstarts/workflow-builder/canvas-organization.md)
* [AI assisted workflow editing](/guides-and-quickstarts/workflow-builder/ai-assisted-workflow-editing.md)


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