fix(process): spawn opencode.exe directly on Windows to prevent visible console window

[danieliyahu1]

Description

When the bot starts the OpenCode server (via /opencode_start\ or \OPENCODE_AUTO_RESTART_ENABLED), a visible console window appears on Windows. The expected behavior is for the server to start silently in the background.

Root cause

\createOpencodeServeSpawnCommand\ spawns \cmd.exe /c opencode serve\ on Windows. The \windowsHide: true\ flag only applies to the \cmd.exe\ process, not to \opencode.exe\ that \cmd.exe\ launches through the .cmd\ npm shim. \opencode.exe\ gets a fresh console.

Fix

Spawn \opencode.exe\ directly instead of going through \cmd.exe /c. The .exe\ path is resolved from the npm prefix. With \windowsHide: true\ applying directly to \opencode.exe, no console window appears.

Changes

• \src/opencode/process.ts: added
  esolveWindowsOpencodeExe()\ helper, rewrote \createOpencodeServeSpawnCommand\ to spawn .exe\ directly on Windows
• \ ests/opencode/process.test.ts: updated Windows test assertion to verify \windowsHide: true\ and that \cmd.exe\ is no longer used

Testing

• 
  pm run build\ — pass
• 
  pm run lint\ — zero warnings
• 
  pm test\ — 999/999 passing (Windows)

[grinev]

@danieliyahu1 Doesn't work on my windows PC. The fix idea is right, but resolveWindowsOpencodeExe() resolves the wrong directory — path.dirname(process.execPath) is the Node.js folder, not the npm global prefix (on Windows that's usually %APPDATA%\npm). So the candidate path doesn't exist and it falls back to "opencode.exe", which spawn() can't find (only the .cmd shim is on PATH, not the .exe).
Result: spawn opencode.exe ENOENT, and /opencode_start fails on a default global install. Seen it in the logs.
You'll need to resolve the npm prefix correctly (e.g. from the opencode.cmd location on PATH), and keep a safe fallback for when the .exe isn't found. Also, the test only checks command !== "cmd.exe", so it passes even when resolution is broken — worth making it assert a real path.

[danieliyahu1]

Pushed an updated fix to the PR branch.\n\nChanges:\n- Resolve the real Windows opencode.exe by locating opencode.cmd on PATH and deriving \node_modules\opencode-ai\bin\opencode.exe\n- Safe fallback to cmd.exe /c opencode serve when the exe cannot be resolved\n- Strengthened tests to fail if Windows returns a bare 'opencode.exe' (prevents ENOENT regressions)\n\nRepro on a default Windows install: opencode.exe is typically not on PATH (only opencode.cmd), so the old fallback caused spawn ENOENT. The new tests cover both the fallback and resolved-exe cases.

[grinev]

@danieliyahu1 thanks for contribution!