app/_smoke.py

"""Phase 0 connectivity proof.

Run with:  uv run python -m app._smoke

Goal: prove the OpenAI Agents SDK can connect to the Meridian MCP and
complete one workflow end-to-end. If this succeeds, the rest of the
build is incremental.
"""

import asyncio

from agents import Agent, Runner

from .config import Config
from .mcp_client import build_mcp_server


async def main() -> None:
    config = Config()
    print(f"MCP URL: {config.mcp_server_url}")
    print(f"Model:   {config.openai_model}")
    print()

    async with build_mcp_server(config.mcp_server_url) as mcp_server:
        # Sanity check: enumerate tools the SDK sees.
        tools = await mcp_server.list_tools()
        print(f"Discovered {len(tools)} MCP tools:")
        for t in tools:
            print(f"  - {t.name}")
        print()

        agent = Agent(
            name="meridian-smoke",
            instructions=(
                "Use the MCP tools to answer the user. Be concise. "
                "Never invent product details — always look them up."
            ),
            model=config.openai_model,
            mcp_servers=[mcp_server],
        )

        prompt = "What monitors do you sell? List up to 3 with their SKUs."
        print(f">>> {prompt}\n")
        result = await Runner.run(agent, prompt, max_turns=4)
        print(result.final_output)
        print()

        usage = result.context_wrapper.usage
        print(
            f"usage: {usage.requests} requests, "
            f"{usage.input_tokens} in / {usage.output_tokens} out tokens"
        )


if __name__ == "__main__":
    asyncio.run(main())