| Name | Type | Description |
|---|---|---|
state_schema* | Any | The state schema class associated with a compiled graph. |
Return True when state_schema exposes a messages field.
LangGraph compiles graphs against a TypedDict (or dataclass-like) state
schema. The default request/response converters only know how to build
{"messages": [...]} payloads, so we fast-fail when the schema does
not expose that key.
