scripts/101_test_message_content_contract.py

#!/usr/bin/env python3

import json
import sys


RAW_RESPONSE = {
    "id": "Root=test-contract",
    "object": "chat.completion",
    "model": "accounts/fireworks/models/deepseek-v4-flash-0731",
    "choices": [
        {
            "index": 0,
            "message": {
                "role": "assistant",
                "content": "APPLICATION PROVIDER OK",
                "reasoning_content": (
                    'We need to respond with exactly '
                    '"APPLICATION PROVIDER OK". No other text.'
                ),
                "tools": None,
            },
            "finish_reason": "stop",
        }
    ],
}


def extract_assistant_content(payload: dict) -> str:
    choices = payload.get("choices")

    if not isinstance(choices, list) or not choices:
        raise ValueError("Provider returned no choices")

    choice = choices[0]

    if not isinstance(choice, dict):
        raise ValueError("Invalid provider choice")

    message = choice.get("message")

    if not isinstance(message, dict):
        raise ValueError("Provider response has no message object")

    content = message.get("content")

    if not isinstance(content, str):
        raise ValueError("Provider message.content is not a string")

    content = content.strip()

    if not content:
        raise ValueError("Provider message.content is empty")

    return content


def main() -> int:
    content = extract_assistant_content(RAW_RESPONSE)

    assert content == "APPLICATION PROVIDER OK"
    assert content != RAW_RESPONSE["choices"][0]["message"]["reasoning_content"]

    print("[PASS] message.content extraction")
    print("[PASS] reasoning_content isolation")
    print("[PASS] non-empty assistant content")
    print(json.dumps({"assistant_content": content}, indent=2))

    return 0


if __name__ == "__main__":
    sys.exit(main())