Bring Windows daemon autostart support to parity with macOS and Linux

[OpenCow42]

Context

Windows can currently run mbd persistently through a manually documented Windows Task Scheduler setup, validated on a clean Windows VM with the portable metabrain-1.2.0-windows-x86_64.zip artifact.

macOS and Linux have native mbd service management, but Windows does not yet have first-class CLI support. That leaves Windows users with more manual setup and less parity across platforms.

Current state

• macOS: mbd service install/start/stop/status/uninstall --user
• Linux: mbd service install/start/stop/status/uninstall --user
• Windows: documented PowerShell + Task Scheduler commands only
• Validated working Windows mechanism:
  • Scheduled task action executes absolute mbd.exe
  • Arguments: serve --config "<LOCALAPPDATA>\\metaBrain\\mbd.json"
  • Trigger: current user logon
  • Settings: restart on failure and no execution time limit

Desired behavior

Bring Windows daemon autostart support on par with macOS and Linux.

Suggested CLI shape:

mbd service print --user --config "$env:LOCALAPPDATA\metaBrain\mbd.json"
mbd service install --user --config "$env:LOCALAPPDATA\metaBrain\mbd.json" --now
mbd service status --user
mbd service start --user
mbd service stop --user
mbd service uninstall --user

Acceptance criteria

• mbd service supports Windows user-level service management through Task Scheduler.
• install --user --config ... --now creates or updates a metaBrain mbd scheduled task and starts it.
• The task runs the absolute mbd.exe path with serve --config "<config path>".
• The task restarts on failure and has no execution time limit.
• status --user reports task state and whether 127.0.0.1:6374 is reachable.
• print --user shows the scheduled task / PowerShell equivalent without installing it.
• Tests cover command generation and Windows-specific behavior where practical.
• Docs can be simplified to use native mbd service commands once implemented.

Notes

The documented manual setup lives in docs/daemon-autostart.md and can serve as the implementation reference.