Dsh Python Tempfile Shim

Key features

• No extra tools to remember — python, pytest, pip, tox, nox, venvs, and any child Python process all get the fix automatically.
• All 0o700 directory creation routes through os.mkdir: tempfile.mkdtemp, tempfile.TemporaryDirectory, os.makedirs(mode=0o700), pathlib.Path.mkdir(mode=0o700), pytest, tox/nox (the shim propagates to subprocesses via PYTHONPATH).
• EnvironmentWindows, DSH workspace-write sandbox, Python 3.11.15 / 3.13.14, pytest 9.1.1.
• No extra model context — the agent just runs Python normally through pwsh.
• A compact always-on system-prompt section tells it the fix is automatic so it never reaches for workarounds.