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fix: add windowsHide and explicit stdio pipes to prevent pwsh.exe stdout loss #389

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fix: add windowsHide and explicit stdio pipes to prevent pwsh.exe stdout loss #389

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6 changes: 5 additions & 1 deletion src/terminal-manager.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -157,12 +157,14 @@ export class TerminalManager {
// Use shell-specific configuration with login flags where appropriate
spawnConfig = getShellSpawnArgs(shellToUse, enhancedCommand);
spawnOptions = {
stdio: ['pipe', 'pipe', 'pipe'] as const,
windowsHide: true, // Prevent .NET-based shells (pwsh.exe) from allocating a new console
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Copilot AI Mar 23, 2026

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The inline comment about windowsHide: true is likely overstating what Node guarantees. In Node.js, windowsHide hides the console window (and may set CREATE_NO_WINDOW), but it doesn’t strictly “prevent” a .NET runtime from calling AllocConsole(). Consider rephrasing to reflect the actual behavior (hide the window / avoid showing a new console) so future debugging isn’t misled.

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windowsHide: true, // Prevent .NET-based shells (pwsh.exe) from allocating a new console
windowsHide: true, // Request that Windows hide the console window (avoid showing a new console for .NET-based shells like pwsh.exe)

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env: {
Comment on lines 159 to 162
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This change is addressing a Windows+pwsh-specific stdout capture regression, but there’s no automated test exercising “pwsh + external executable stdout” (e.g., pwsh -Command "python -c ..." or git --version"). Adding a Windows-gated regression test (skipping if pwsh isn’t present) would help prevent reintroducing the issue.

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...process.env,
TERM: 'xterm-256color' // Better terminal compatibility
}
};

// Add shell option if needed (for unknown shells)
if (spawnConfig.useShellOption) {
spawnOptions.shell = spawnConfig.useShellOption;
Expand All @@ -176,6 +178,8 @@ export class TerminalManager {
};
spawnOptions = {
shell: shellToUse,
stdio: ['pipe', 'pipe', 'pipe'] as const,
windowsHide: true,
env: {
...process.env,
TERM: 'xterm-256color'
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