Importing {name} from langgraph.constants is deprecated. Ple

Error message

Importing {name} from langgraph.constants is deprecated. Please use 'from langgraph.types import {name}' instead.

What it means

Error "Importing {name} from langgraph.constants is deprecated. Please use 'from langgraph.types import {name}' instead." thrown in langchain-ai/langgraph.

Source

Thrown at libs/langgraph/langgraph/constants.py:36

    "CONF",
    "TASKS",
    "CONFIG_KEY_CHECKPOINTER",
)

# --- Public constants ---
TAG_NOSTREAM = sys.intern("nostream")
"""Tag to disable streaming for a chat model."""
TAG_HIDDEN = sys.intern("langsmith:hidden")
"""Tag to hide a node/edge from certain tracing/streaming environments."""
END = sys.intern("__end__")
"""The last (maybe virtual) node in graph-style Pregel."""
START = sys.intern("__start__")
"""The first (maybe virtual) node in graph-style Pregel."""


def __getattr__(name: str) -> Any:
    if name in ["Send", "Interrupt"]:
        warn(
            f"Importing {name} from langgraph.constants is deprecated. "
            f"Please use 'from langgraph.types import {name}' instead.",
            LangGraphDeprecatedSinceV10,
            stacklevel=2,
        )

        from importlib import import_module

        module = import_module("langgraph.types")
        return getattr(module, name)

    try:
        from importlib import import_module

        private_constants = import_module("langgraph._internal._constants")
        attr = getattr(private_constants, name)
        warn(
            f"Importing {name} from langgraph.constants is deprecated. "

View on GitHub (pinned to 38031739e5)

When it happens

Trigger: Thrown at libs/langgraph/langgraph/constants.py:36 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of langchain-ai/langgraph@38031739e5 (2026-08-26). Data as JSON: /api/errors/981835bc4fbc812b. Report an issue: GitHub.