Shell tool broken on Windows: [WinError 2] powershell.exe not found

[elis132]

Bug Description

The Shell tool fails on every invocation on Windows with:

[WinError 2] Det går inte att hitta filen

("The system cannot find the file specified")

Root Cause

In kimi_cli/utils/environment.py, the Windows branch sets:

shell_path = KaosPath("powershell.exe")

This bare filename is passed to asyncio.create_subprocess_exec() (via kaos.exec), which calls CreateProcessW. The uv tool virtual environment does not include C:\Windows\System32\WindowsPowerShell\v1.0\ in its PATH, so the process creation fails with ERROR_FILE_NOT_FOUND.

Reproduction

import asyncio

async def test():
    # This fails in the uv venv:
    p = await asyncio.create_subprocess_exec(
        "powershell.exe", "-command", "echo hello",
        stdin=asyncio.subprocess.PIPE,
        stdout=asyncio.subprocess.PIPE,
        stderr=asyncio.subprocess.PIPE,
    )

asyncio.run(test())
# [WinError 2]

Suggested Fix

Resolve the full path using the SystemRoot environment variable, which is always set on Windows:

if os_kind == "Windows":
    shell_name = "Windows PowerShell"
    import os
    system_root = os.environ.get("SystemRoot", r"C:\Windows")
    shell_path = KaosPath(
        os.path.join(system_root, "System32", "WindowsPowerShell", "v1.0", "powershell.exe")
    )

This works on any standard Windows installation regardless of PATH configuration.

Environment

• Windows 11 Pro
• kimi-cli installed via uv tool install kimi-cli
• Python 3.13