Conditional edge
A conditional edge is a graph or workflow transition whose destination is selected by evaluating a condition at runtime.
AI Agents and Applications
A conditional edge is a workflow transition whose destination is selected at runtime according to state or other conditions.
- How it is used
- Routes stateful research workflows and tool-using agents according to intermediate results or tool calls.
- How deep it goes
- Defines state-based routing, gives a routing-function example, and follows a tool-call decision through debugging.
- Examples
- Uses a search-result count, a relevance-gated research report, and an agent deciding between tools and END.
- What you can do after
- Build it from scratch with a state-reading routing function, then debug its destination using intermediate messages.
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Build Python Web Apps with Streamlit
A conditional edge is a graph transition whose next node is selected by evaluating a specified condition.
- How it is used
- Routes an agent graph between tool execution and conversation completion according to the assistant's latest response.
- How deep it goes
- Explains branching, built-in routing, and the tool loop, but stops short of detailing the condition function's internal implementation.
- Examples
- Uses an agent graph that tracks or cancels orders through tool calls.
- What you can do after
- Apply it via LangGraph to route tool-enabled assistant workflows and return tool results for further reasoning.
Read how Build Python Web Apps with Streamlit explains conditional edge →
Related concepts
- edgekind of · An edge is a graph connection between two vertices that represents a relationship and may be directed, labeled, or weighted.
- graph-based workflowused by · A graph-based workflow represents processing steps as nodes and their execution order, data flow, or branching as edges.
- routingused by · Routing is the selection of a path, destination, or processing component to direct an item, request, or flow toward an intended endpoint.
- stateuses · State is information or a configuration describing the condition of a system, entity, or computation at a particular time and potentially influencing subsequent behavior or decisions.
- tools_conditionconfigured by · tools_condition is a LangGraph routing utility that directs execution according to whether the latest language-model message contains tool calls.
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