fix(windows+ci): non-POSIX shlex.split for worker commands; LocalStack env rework

- Client/CatalogClientMixin split self.server_path with POSIX shlex,
  which eats the backslashes in Windows interpreter paths (WinError 2).
  Split with posix=False on win32, matching vgi-rpc's CLI.
- LocalStack job: use the project env (uv sync --all-extras) overlaid
  with the local vgi-rpc checkout + boto3, and pass --no-sync to uv run
  so the overlay survives; the previous hand-built venv was invisible
  to uv run (boto3 ModuleNotFoundError).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: rustyconover

.github/workflows/ci.yml

@@ -88,36 +88,20 @@ jobs:
 
       - name: Install test dependencies
         run: |
-          # Pin the venv interpreter — an unpinned `uv venv` picks the newest
-          # available CPython, which sdist-only deps may not support yet.
-          uv venv --python 3.13
-          uv pip install \
-            click \
-            pyarrow \
-            typer \
-            platformdirs \
-            numpy \
-            pytest \
-            pytest-mypy \
-            pytest-ruff \
-            mypy \
-            ruff \
-            httpx \
-            backports.zstd \
-            zstandard \
-            boto3 \
-            waitress \
-            aiohttp \
-            tenacity
-          uv pip install -e './vgi-rpc[http,s3,external]'
+          # Project env first (vgi + fixtures + dev tools), then overlay the
+          # local vgi-rpc checkout with the s3/external extras plus boto3.
+          # Subsequent uv run calls must pass --no-sync or uv re-syncs the
+          # env to the lockfile and drops the overlay.
+          uv sync --all-extras --python 3.13
+          uv pip install './vgi-rpc[http,s3,external]' boto3
 
       - name: Create test bucket in LocalStack
         env:
           AWS_ACCESS_KEY_ID: test
           AWS_SECRET_ACCESS_KEY: test
           AWS_DEFAULT_REGION: us-east-1
         run: |
-          uv run python - <<'PY'
+          uv run --no-sync python - <<'PY'
           import time
           import boto3
           from botocore.exceptions import EndpointConnectionError
@@ -152,4 +136,4 @@ jobs:
           VGI_HTTP_S3_BUCKET: rusty-vgi-test
           VGI_HTTP_S3_ENDPOINT_URL: http://127.0.0.1:4566
           PYTHONPATH: ${{ github.workspace }}
-        run: uv run pytest tests/test_http_s3_offload_output.py tests/test_http_s3_offload_input.py -q
+        run: uv run --no-sync pytest tests/test_http_s3_offload_output.py tests/test_http_s3_offload_input.py -q

vgi/client/catalog_mixin.py

@@ -39,6 +39,7 @@ class CatalogEnabledClient(CatalogClientMixin, Client):
 from __future__ import annotations
 
 import shlex
+import sys
 from collections.abc import Iterator, Sequence
 from contextlib import contextmanager
 from typing import Any, Literal, overload
@@ -135,7 +136,7 @@ def _catalog_connect(self) -> Iterator[VgiProtocol]:
                 ) as proxy:
                     yield proxy
             else:
-                cmd = shlex.split(self.server_path)
+                cmd = shlex.split(self.server_path, posix=sys.platform != "win32")
                 with _catalog_pool.connect(VgiProtocol, cmd) as proxy:  # type: ignore[type-abstract]
                     yield proxy
         except RpcError as e:

vgi/client/client.py

@@ -71,6 +71,7 @@
 import logging
 import os
 import shlex
+import sys
 import subprocess
 import threading
 from collections.abc import Callable, Generator, Iterator
@@ -631,7 +632,7 @@ def _spawn_subprocess_connection(self, worker_index: int) -> WorkerConnection:
         """
         if self._pool is not None:
             _logger.debug("borrowing_worker worker_index=%s", worker_index)
-            cmd = shlex.split(self.server_path)
+            cmd = shlex.split(self.server_path, posix=sys.platform != "win32")
             ctx = self._pool.connect(
                 VgiProtocol,  # type: ignore[type-abstract]
                 cmd,