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Eugene Yurtsev
2024-12-11 11:32:33 -05:00
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docs/docs/concepts/low_level.md
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@@ -446,19 +446,6 @@ graph.invoke(inputs, config={"recursion_limit": 5, "configurable":{"llm": "anthr
Read [this how-to](https://langchain-ai.github.io/langgraph/how-tos/recursion-limit/) to learn more about how the recursion limit works.
## Breakpoints
Breakpoints pause graph execution at specific points, enabling [**human-in-the-loop**](./human_in_the_loop.md) workflows and debugging. Breakpoints are powered by LangGraph's [**persistence layer**](./persistence.md), which saves the state after each graph step.
You **MUST** use a [checkpointer](./persistence.md) when using breakpoints as breakpoints require the ability to save the state of the graph at the time of pausing.
There are two places where you can set breakpoints:
1. **Inside** a node using the [`interrupt` function](#the-interrupt-function) (or the older [`NodeInterrupt` exception](#nodeinterrupt-exception)).
2. **Before** or **after** a node executes by setting breakpoints at **compile time** or **run time**. We call these [**static breakpoints**](#static-breakpoints).
Read more about breakpoints in the [Breakpoints conceptual guide](./breakpoints.md).
## `interrupt`
Use the [interrupt](../reference/types.md/#langgraph.types.interrupt) function to **pause** the graph at specific points to collect user input. The `interrupt` function surfaces interrupt information to the client, allowing the developer to collect user input, validate the graph state, or make decisions before resuming execution.
@@ -480,6 +467,12 @@ Resuming the graph is done by passing a [`Command`](#command) object to the grap
Read more about how the `interrupt` is used for **human-in-the-loop** workflows in the [Human-in-the-loop conceptual guide](./human_in_the_loop.md).
## Breakpoints
Breakpoints pause graph execution at specific points and enable stepping through execution step by step. Breakpoints are powered by LangGraph's [**persistence layer**](./persistence.md), which saves the state after each graph step. Breakpoints can also be used to enable [**human-in-the-loop**](./human_in_the_loop.md) workflows, though we recommend using the [`interrupt` function](#interrupt-function) for this purpose.
Read more about breakpoints in the [Breakpoints conceptual guide](./breakpoints.md).
## Subgraphs
A subgraph is a [graph](#graphs) that is used as a [node](#nodes) in another graph. This is nothing more than the age-old concept of encapsulation, applied to LangGraph. Some reasons for using subgraphs are: