isProcessAlive now catches ALL errors and returns false (pure boolean
probe). Callers use it in if/while conditions without try/catch, so
throwing on EPERM was a behavior change that could crash the CLI.
Windows path gets its safety catch restored.
safeUnlinkQuiet added for best-effort cleanup paths where throwing on
non-ENOENT errors (like EPERM during shutdown) would abort cleanup.
json() removed — dead code, never imported anywhere.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Garry Tan
6a857d41ba