nanoresearch health crashes with NameError: name 'os' is not defined in discover_environments() on Windows

[cqyzc99]

Summary

Running nanoresearch health on Windows crashes during environment discovery because nanoresearch/agents/runtime_env/_discovery.py uses os.environ / os.path.expanduser(...) without importing os.

Environment

• OS: Windows 11
• Shell: PowerShell
• Python: conda environment
• Project path: D:\NanoResearch

Steps to reproduce

1. Clone the repo on Windows.
2. Create and activate a conda environment.
3. Install the project in editable mode.
4. Run:

nanoresearch health

Actual behavior

The command crashes with:

NameError:` name 'os' is not defined

Traceback excerpt:

File "D:\NanoResearch\nanoresearch\agents\runtime_env_discovery.py", line 85, in discover_environments
pyenv_root = os.environ.get("PYENV_ROOT") or os.path.expanduser("~/.pyenv")
NameError: name 'os' is not defined

Expected behavior

nanoresearch health should complete normally and report detected Python environments.

Root cause

nanoresearch/agents/runtime_env/_discovery.py references os.environ and os.path.expanduser(...) but does not import os.

Suggested fix

Add the missing import at the top of nanoresearch/agents/runtime_env/_discovery.py:

import os

For example:

from __future__ import annotations

import json
import logging
import os
import platform
import re
import shutil
import subprocess
from pathlib import Path
from typing import Any

[YujunWu03]

Hi @cqyzc99, thanks for reporting this!Fixed in 283374b. The missing import os has been added to _discovery.py. We also audited the rest of the codebase and fixed 4other files with the same kind of missing stdlib imports (re, shutil).Please pull the latest main and let us know if the issue persists. Thanks again for catching this!