> For the complete documentation index, see [llms.txt](https://docs.roboflow.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.roboflow.com/changelog/explore-by-month/april-2026/nested-workflow-block.md).

# Nested Workflow Block

A new nested Workflow block is now available, allowing you to construct pipelines that call and execute other existing workflows. When you add this block, it automatically adopts the inputs and outputs of the nested workflow, enabling you to easily pass data like images or object detections between the parent and child pipelines.

The Workflow block enables a highly modular approach to building computer vision applications. You can reuse existing logic across multiple pipelines and pass resolved output types directly to downstream steps like visualizations without rebuilding the entire sequence. 

[See the Workflow block documentation](https://inference.roboflow.com/workflows/blocks/inner_workflow/)