tool · inferred from evidence
checkpointer
A tool or object used for managing checkpoints in the database, part of the PostgresSaver workflow.
No visible threads name this tag yet.
tool · inferred from evidence
A tool or object used for managing checkpoints in the database, part of the PostgresSaver workflow.
No visible threads name this tag yet.
Chat models retry failed requests with exponential backoff automatically: up to 6 times for network errors, 429 rate limits, and 5xx server errors. 401 and 404 are never retried. Tune with max_retries and timeout.
Sequential LLMChain-style pipelines become StateGraph nodes with typed state. Each chain step is a node, the state schema replaces the implicit dict passing, and conditional edges replace the branching logic people used to hide in callbacks
Fixes checkpointer failures in LangGraph map-reduce graphs where Send objects fail to serialize. Use when a graph using Send() for fan-out crashes on checkpoint writes with a serialization TypeError. Fixed in recent langgraph versions; upgr
Explains LangGraph's interrupt_after semantics: it fires after the node AND its outgoing edges run. Use when interrupt_after seems to trigger at the wrong time or your conditional edge runs before the pause. Fixed by switching to interrupt_
Fixes LangGraph's AsyncPostgresSaver failing to read checkpoints with a NoneType error on version 2.0.23. Use when alist/get_tuple raises about NoneType not being a mapping on langgraph-checkpoint-postgres 2.0.23. Fixed in the next release;