LangChain Reference home page
Search...
⌘K
Ask AI
GitHub
Main Docs
Deep Agents
LangChain
LangGraph
Integrations
LangSmith
⌘I
Chat LangChain
What can I help with?
Enter
to send
·
Shift+Enter
new line
What are deep agents and how do I get started?
How do I build a React app around a Deep Agent?
How do I stream subagent output to my frontend with useStream?
Menu
Navigation
Projects
LangGraph
Overview
Graphs
Functional API
Pregel
Checkpointing
Storage
Caching
Types
Runtime
Config
Errors
Constants
Channels
Agents
LangGraph Checkpoint
LangGraph Store
Checkpoint Postgres
Store Postgres
Checkpoint SQLite
LangGraph Prebuilt
LangGraph CLI
LangGraph SDK
LangGraph Supervisor
LangGraph Swarm
Language
Python
JavaScript
Theme
Light
Dark
Python
langgraph
errors
UnknownInterruptError
reason
Attribute
v1.2.20 (latest)
●
Since v1.2
reason
Copy
reason
:
Literal
[
'not_pending'
,
'empty_map'
,
'ambiguous'
]
=
reason
View source on GitHub
Version History
