phantom start daemonizes the proxy using CommandExt::process_group(0) — Unix-only syscall.

Location

• phantom-cli/src/commands/start.rs:52-57

Fix

Gate the existing code with #[cfg(unix)]. Add #[cfg(windows)] path using Windows creation flags so the proxy survives the parent's exit:

use std::os::windows::process::CommandExt;
const DETACHED_PROCESS: u32 = 0x00000008;
const CREATE_NO_WINDOW: u32 = 0x08000000;
cmd.creation_flags(DETACHED_PROCESS | CREATE_NO_WINDOW);

Also verify the PID-file lock handling still works — Windows does not recycle PIDs the same way Linux does, so the stale-PID check may need adjustment.

Severity

Functional gap — phantom start will not run detached on Windows.

Tracker: #1