From 5acfc64d1e4190d764e50cbdea4b9d586c7b67d9 Mon Sep 17 00:00:00 2001
From: Matt Van Horn <455140+mvanhorn@users.noreply.github.com>
Date: Sun, 15 Mar 2026 20:47:19 -0700
Subject: [PATCH] fix(browse): use CDP websocket fallback on Windows

Bun's pipe transport hangs when Playwright launches Chromium on Windows
(#77). Detect Windows and pass --remote-debugging-port=0 to use websocket
transport instead. macOS/Linux behavior is unchanged.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 browse/src/browser-manager.ts | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/browse/src/browser-manager.ts b/browse/src/browser-manager.ts
index f684ce1..9ece9d3 100644
--- a/browse/src/browser-manager.ts
+++ b/browse/src/browser-manager.ts
@@ -42,7 +42,18 @@ export class BrowserManager {
   private dialogPromptText: string | null = null;
 
   async launch() {
-    this.browser = await chromium.launch({ headless: true });
+    const isWindows = process.platform === 'win32';
+
+    if (isWindows) {
+      // Bun's pipe transport hangs on Windows (garrytan/gstack#77).
+      // Use websocket transport instead of the default pipe.
+      this.browser = await chromium.launch({
+        headless: true,
+        args: ['--remote-debugging-port=0'],
+      });
+    } else {
+      this.browser = await chromium.launch({ headless: true });
+    }
 
     // Chromium crash → exit with clear message
     this.browser.on('disconnected', () => {