Problem with `uv run` not running to completion.

uv_run_stuck_mcp.py

#!/usr/bin/env python3
"""
Prerequisite:

    docker run --rm --name=cratedb \
        --publish=4200:4200 --publish=5432:5432 \
        --env=CRATE_HEAP_SIZE=2g crate/crate:nightly \
        -Cdiscovery.type=single-node

Variants:

    uv run uv_run_stuck_mcp.py --direct
    uv run uv_run_stuck_mcp.py --uv

    python uv_run_stuck_mcp.py --direct
    python uv_run_stuck_mcp.py --uv

Problem:

    `python uv_run_stuck_mcp.py --uv` stalls and does run to completion.
    Is UV-12108 [1] the root cause?

    [1] https://github.com/astral-sh/uv/issues/12108
"""

# /// script
# requires-python = ">=3.10"
# dependencies = [
#     "mcp",
#     "pyyaml",
#     "where",
# ]
# ///
import asyncio
import shlex
import sys

import yaml
from mcp import ClientSession, StdioServerParameters
from mcp.client.stdio import stdio_client


async def run(runtime: str):
    # Create server parameters for stdio connection.
    if runtime == "direct":
        cmd = "mcp-alchemy"
    elif runtime == "uv":
        cmd = "uv run --with='mcp-alchemy @ git+https://github.com/runekaagaard/mcp-alchemy.git@b85aae6' mcp-alchemy"
    else:
        raise NotImplementedError(f"Unknown runtime: {runtime}")
    command = shlex.split(cmd)
    server_params = StdioServerParameters(
        command=command[0],
        args=command[1:],
        env={"DB_URL": "crate://crate@localhost:4200/?schema=testdrive"},
    )

    # Start server, and inquire available tools.
    async with stdio_client(server_params) as (read, write):
        async with ClientSession(read, write) as session:
            # Initialize the connection.
            await session.initialize()

            # Inquire list of tools.
            response = await session.list_tools()
            for tool in response.tools:
                print(yaml.dump(tool.model_dump(mode="json")))


if __name__ == "__main__":
    try:
        runtime = sys.argv[1].replace("--", "")
    except Exception:
        print(
            "ERROR: Missing command line option flag. Use `--direct` or `--uv`",
            file=sys.stderr,
        )
        sys.exit(1)

    if runtime not in ["direct", "uv"]:
        print(
            "ERROR: Invalid line option flag. Use `--direct` or `--uv`", file=sys.stderr
        )
        sys.exit(1)

    asyncio.run(run(runtime))