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Let Client take StdioServerParameters directly (#3321)

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Max 2026-08-17 14:31:21 +01:00 • committed by GitHub
commit e473cca6a1
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1 changed files with 51 additions and 27 deletions
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8
examples/stories/_harness.py
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@ -20,7 +20,7 @@ from urllib.parse import urlsplit
import anyio
import httpx2
from mcp import StdioServerParameters, stdio_client
from mcp import StdioServerParameters
from mcp.client import Transport
from mcp.client.streamable_http import streamable_http_client
from mcp.server import Server
@ -32,8 +32,8 @@ if sys.version_info >= (3, 11):
else:
import tomli as tomllib
Target: TypeAlias = "Server[Any] | MCPServer | Transport | str"
"""Anything ``Client(...)`` accepts: an in-process server, a ``Transport``, or an HTTP URL."""
Target: TypeAlias = "Server[Any] | MCPServer | Transport | StdioServerParameters | str"
"""Anything ``Client(...)`` accepts: an HTTP URL, stdio launch parameters, a ``Transport``, or an in-process server."""
TargetFactory = Callable[[], Target]
"""Yields a FRESH target against the same server/app on every call (``multi_connection`` stories)."""
@ -63,7 +63,7 @@ def target_from_args(file: str, url: str | None) -> TargetFactory:
# stdio is legacy-only until serve_stdio() lands; the modern arm is --http only for now.
server = Path(file).parent / f"{argv_after('--server', default='server')}.py"
params = StdioServerParameters(command=sys.executable, args=[str(server)])
return lambda: stdio_client(params) # becomes Client(params) once that overload lands
return lambda: params
def _explicit_http_url() -> str | None: