On Windows, bun/npm install gbrain as a gbrain.cmd/.ps1 shim and gstack-brain-sync
is a bash shebang script. spawnSync/spawn/execFileSync resolve neither without a
shell, so the child spawn failed ENOENT — on the sync orchestrator this surfaced
as 'brain-sync exited undefined' (#1731).
Add NEEDS_SHELL_ON_WINDOWS (process.platform === 'win32') in gbrain-exec and pass
it as shell: to every gbrain/brain-sync child spawn: spawnGbrain, spawnGbrainAsync,
execGbrainText (gbrain-exec), the two sources-list/remove/add spawns (gbrain-sources),
the version + probe spawns (gbrain-local-status), and the two brain-sync spawns in
the orchestrator. POSIX keeps the cheaper no-shell path.
macOS/Linux CI can't exercise the Windows path, so test/gbrain-spawn-windows-shell.ts
is a static-grep tripwire: it fails CI if a gbrain/brain-sync spawn is added without
the shell flag.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Garry Tan