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System One

trycua/cua

Cua's own family of small System 1 models for computer-use decisions, separate from TypeSafe's Jev. CUA-S1-FORMS is the first release, with weights and a dataset on Hugging Face.

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trycua/cua on GitHub

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How it uses Jev

from typesafe_sdk import Choice

response = client.system_one(
    state={"observation": dict(observation)},
    questions={
        "candidate": Choice(
            instructions=goal,
            criteria=dict(criteria),
        )
    },
)
answer = response.choices["candidate"]
if answer.choice not in criteria:
    raise ValueError(f"Jev selected unknown candidate: {answer.choice}")
confidence = float(answer.confidence)

View in libs/cua-driver/examples/jev-use/python/jev_adapter.py

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