Noul

Ask a binary question and receive the probability that its answer is yes.

Use Noul when the probability itself is useful to application code, such as deciding whether a message reports a bug or requests a refund. A value near 1 indicates strong support for yes, a value near 0 indicates strong support for no, and a value near 0.5 indicates uncertainty. Noul answers do not include a separate confidence value.

from langchain_core.decisions import Noul

response = classifier.invoke(
    {
        "state": "Production is down. Please help immediately.",
        "questions": {
            "urgent": Noul(
                instructions="Does this message require an urgent response?"
            )
        },
    }
)
urgency = response.nouls["urgent"].noul

if urgency >= 0.8:
    page_on_call_engineer()