Runtime evidence: real Windows desktop app launching its WSL backend.
Console output below is from live /proc reads, not tests.
Each terminal image was byte-identical to another capture taken 500 ms earlier.

LIVE WSL BACKEND PROCESS INSPECTION

Windows Server 2025 / Ubuntu 24.04 / unpackaged Electron
Commit: 2c61677d59bf28730779a578a7b543528f0ca683
Mode: combined-ubuntu

Command: wsl.exe -d Ubuntu -- python3 probe.py
Probe reads /proc/<pid>/cmdline and /proc/<pid>/cwd.

Distro user home: /root
Matching backend count: 1
Linux PID: 531
Backend: node <checkout>/apps/server/dist/bin.mjs --bootstrap-fd 0
Backend cwd: /mnt/c/Users/<user>/<checkout>
cwd equals Linux home: False

Windows user and checkout path are redacted. No cwd value is changed otherwise.


LIVE WSL BACKEND PROCESS INSPECTION

Windows Server 2025 / Ubuntu 24.04 / unpackaged Electron
Commit: 2c61677d59bf28730779a578a7b543528f0ca683
Mode: only-ubuntu

Command: wsl.exe -d Ubuntu -- python3 probe.py
Probe reads /proc/<pid>/cmdline and /proc/<pid>/cwd.

Distro user home: /root
Matching backend count: 1
Linux PID: 641
Backend: node <checkout>/apps/server/dist/bin.mjs --bootstrap-fd 0
Backend cwd: /mnt/c/Users/<user>/<checkout>
cwd equals Linux home: False

Windows user and checkout path are redacted. No cwd value is changed otherwise.


LIVE WSL BACKEND PROCESS INSPECTION

Windows Server 2025 / Ubuntu 24.04 / unpackaged Electron
Commit: 2c61677d59bf28730779a578a7b543528f0ca683
Mode: only-default

Command: wsl.exe -d Ubuntu -- python3 probe.py
Probe reads /proc/<pid>/cmdline and /proc/<pid>/cwd.

Distro user home: /root
Matching backend count: 1
Linux PID: 749
Backend: node <checkout>/apps/server/dist/bin.mjs --bootstrap-fd 0
Backend cwd: /mnt/c/Users/<user>/<checkout>
cwd equals Linux home: False

Windows user and checkout path are redacted. No cwd value is changed otherwise.


LIVE WSL BACKEND PROCESS INSPECTION

Windows Server 2025 / Ubuntu 24.04 / unpackaged Electron
Commit: fcde38dce345f02716429e52046b9a69b5efe91a
Mode: combined-ubuntu

Command: wsl.exe -d Ubuntu -- python3 probe.py
Probe reads /proc/<pid>/cmdline and /proc/<pid>/cwd.

Distro user home: /root
Matching backend count: 1
Linux PID: 529
Backend: node <checkout>/apps/server/dist/bin.mjs --bootstrap-fd 0
Backend cwd: /root
cwd equals Linux home: True

Windows user and checkout path are redacted. No cwd value is changed otherwise.


LIVE WSL BACKEND PROCESS INSPECTION

Windows Server 2025 / Ubuntu 24.04 / unpackaged Electron
Commit: fcde38dce345f02716429e52046b9a69b5efe91a
Mode: only-ubuntu

Command: wsl.exe -d Ubuntu -- python3 probe.py
Probe reads /proc/<pid>/cmdline and /proc/<pid>/cwd.

Distro user home: /root
Matching backend count: 1
Linux PID: 644
Backend: node <checkout>/apps/server/dist/bin.mjs --bootstrap-fd 0
Backend cwd: /root
cwd equals Linux home: True

Windows user and checkout path are redacted. No cwd value is changed otherwise.


LIVE WSL BACKEND PROCESS INSPECTION

Windows Server 2025 / Ubuntu 24.04 / unpackaged Electron
Commit: fcde38dce345f02716429e52046b9a69b5efe91a
Mode: only-default

Command: wsl.exe -d Ubuntu -- python3 probe.py
Probe reads /proc/<pid>/cmdline and /proc/<pid>/cwd.

Distro user home: /root
Matching backend count: 1
Linux PID: 531
Backend: node <checkout>/apps/server/dist/bin.mjs --bootstrap-fd 0
Backend cwd: /root
cwd equals Linux home: True

Windows user and checkout path are redacted. No cwd value is changed otherwise.