Connection error on Linux: illegal '#' character in X-Msh-Os-Version HTTP header

[voloshchik]

What version of Kimi Code CLI is running?

version 1.12.0

Which open platform/subscription were you using?

/login

Which model were you using?

kimi-for-coding

What platform is your computer?

Linux 5.15.0-100-generic x86_64

What issue are you seeing?

Every message returns "LLM provider error: Connection error".
The CLI is completely non-functional.

Full error from logs (~/.kimi/logs/):

httpcore.LocalProtocolError: Illegal header value b'#100~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Mon Jan 19 17:10:19 UTC '

Root cause: _common_headers() in auth/oauth.py passes platform.version() directly
as the X-Msh-Os-Version HTTP header value. On Linux, platform.version() starts with
'#' which h11 rejects as an illegal HTTP header character.

What steps can reproduce the bug?

1. Install Kimi CLI on Ubuntu 22.04 with kernel 5.15.0-100-generic (build number ≥ 100)
2. Run kimi login, select Kimi Code
3. Send any message
4. Result: "LLM provider error: Connection error" every time

Verify the issue:
python3 -c "import platform; print(repr(platform.version()))"

Output: '#100~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Mon Jan 19 17:10:19 UTC '

Note the '#' at the start — this is what breaks h11

What is the expected behavior?

The CLI should sanitize platform.version() before using it as an HTTP header value.

Fix in kimi_cli/auth/oauth.py, function _common_headers():

Before

"X-Msh-Os-Version": platform.version(),

After

"X-Msh-Os-Version": platform.version().replace("#", "").strip(),

Additional information

No response

[voloshchik]

Update: VS Code Extension also affected

The same bug breaks the official Kimi Code VS Code extension on Linux.

Error in VS Code:

[voloshchik]

Update: VS Code Extension also affected (cannot be patched manually)

The official Kimi Code VS Code extension (v0.4.1) has the same bug on Linux.

Error:

{"jsonrpc":"2.0","id":"...","error":{"code":-32003,"message":"Connection error.","data":null}}

Root cause: The VS Code extension ships its own bundled CLI binary at:
~/.config/Code/User/globalStorage/moonshot-ai.kimi-code/bin/kimi/kimi

This is a PyInstaller-compiled binary — the Python source is baked in and cannot be patched manually like the uv-installed CLI.

Workaround: Point the extension to the manually patched CLI via settings.json:

{
    "kimi.executablePath": "/home/vladimir/.local/bin/kimi"
}

This means the fix must be applied in two places:

1. kimi-cli package (kimi_cli/auth/oauth.py)
2. The PyInstaller binary bundled inside the VS Code extension

Please rebuild and republish the VS Code extension with the same fix applied.

[AsoulAva]

太棒了，我按照你的方式成功修复了！

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Awesome, I successfully fixed it your way!