Sub-workflows in Langgraph

[ANEREL]

Checked

• I searched existing ideas and did not find a similar one
• I added a very descriptive title
• I've clearly described the feature request and motivation for it

Feature request

I would like to request the development of sub-workflows for LandGraph. The key features of this request include:

1.	Composability:
•	Allow the composition of workflows using nodes, edges, and conditional edges.
•	Enable these composed workflows to be added onto other workflows.
2.	Isolation:
•	Ensure that workflows can be built and tested in isolation.
•	This isolation should allow for the independent verification of each workflow’s functionality.
3.	Local State:
•	As an added feature, implement a state that is local to a specific workflow.
•	This local state should be managed separately from the global state to maintain the integrity and isolation of each workflow.

Motivation

•	Enhances modularity by allowing smaller, manageable sub-workflows.
•	Facilitates easier testing and debugging by isolating workflows.
•	Improves the reusability of workflows in different contexts.
•	This feature would be particularly useful in scenarios where complex workflows need to be constructed from simpler, well-tested components.
•	It will also be beneficial in situations requiring conditional transitions and localized state management within sub-workflows.

Proposal (If applicable)

No response

[James6588]

This sub-workflow idea will become necessary for a complex agentic system.

[ANEREL]

Nevermind! Already in the framework. You guys are awesome: https://langchain-ai.github.io/langgraph/how-tos/subgraph/#create-parent-child-graphs