diff --git a/.agents/skills/impeccable/scripts/lib/open-system-browser.mjs b/.agents/skills/impeccable/scripts/lib/open-system-browser.mjs
new file mode 100644
index 000000000..c44cd847a
--- /dev/null
+++ b/.agents/skills/impeccable/scripts/lib/open-system-browser.mjs
@@ -0,0 +1,26 @@
+import { spawn } from 'node:child_process';
+
+export function browserOpenCommand(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+} = {}) {
+  if (platform === 'darwin') return { command: 'open', args: [url] };
+  if (platform === 'win32') return { command: comspec, args: ['/c', 'start', '', url] };
+  return { command: 'xdg-open', args: [url] };
+}
+
+export function openSystemBrowser(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+  spawnImpl = spawn,
+} = {}) {
+  const { command, args } = browserOpenCommand(url, { platform, comspec });
+  try {
+    const child = spawnImpl(command, args, { stdio: 'ignore', detached: true });
+    child.on('error', () => {});
+    child.unref();
+    return true;
+  } catch {
+    return false;
+  }
+}
diff --git a/.agents/skills/impeccable/scripts/serve-question.mjs b/.agents/skills/impeccable/scripts/serve-question.mjs
index 25beaa759..2d8c24a6a 100644
--- a/.agents/skills/impeccable/scripts/serve-question.mjs
+++ b/.agents/skills/impeccable/scripts/serve-question.mjs
@@ -79,6 +79,7 @@ import fs from 'node:fs';
 import path from 'node:path';
 import { spawn } from 'node:child_process';
 import { fileURLToPath } from 'node:url';
+import { openSystemBrowser } from './lib/open-system-browser.mjs';
 
 function arg(name, fallback = null) {
   const i = process.argv.indexOf(`--${name}`);
@@ -976,8 +977,7 @@ server.listen(portArg, '127.0.0.1', () => {
     console.log('Waiting for the user to choose in the browser (Ctrl-C aborts)...');
   }
   if (!hasFlag('no-open')) {
-    const opener = process.platform === 'darwin' ? 'open' : process.platform === 'win32' ? 'start' : 'xdg-open';
-    try { spawn(opener, [url], { stdio: 'ignore', detached: true }).unref(); } catch { /* URL printed anyway */ }
+    openSystemBrowser(url);
   }
   if (timeoutSec > 0) {
     setTimeout(() => {
diff --git a/.claude/skills/impeccable/scripts/lib/open-system-browser.mjs b/.claude/skills/impeccable/scripts/lib/open-system-browser.mjs
new file mode 100644
index 000000000..c44cd847a
--- /dev/null
+++ b/.claude/skills/impeccable/scripts/lib/open-system-browser.mjs
@@ -0,0 +1,26 @@
+import { spawn } from 'node:child_process';
+
+export function browserOpenCommand(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+} = {}) {
+  if (platform === 'darwin') return { command: 'open', args: [url] };
+  if (platform === 'win32') return { command: comspec, args: ['/c', 'start', '', url] };
+  return { command: 'xdg-open', args: [url] };
+}
+
+export function openSystemBrowser(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+  spawnImpl = spawn,
+} = {}) {
+  const { command, args } = browserOpenCommand(url, { platform, comspec });
+  try {
+    const child = spawnImpl(command, args, { stdio: 'ignore', detached: true });
+    child.on('error', () => {});
+    child.unref();
+    return true;
+  } catch {
+    return false;
+  }
+}
diff --git a/.claude/skills/impeccable/scripts/serve-question.mjs b/.claude/skills/impeccable/scripts/serve-question.mjs
index 25beaa759..2d8c24a6a 100644
--- a/.claude/skills/impeccable/scripts/serve-question.mjs
+++ b/.claude/skills/impeccable/scripts/serve-question.mjs
@@ -79,6 +79,7 @@ import fs from 'node:fs';
 import path from 'node:path';
 import { spawn } from 'node:child_process';
 import { fileURLToPath } from 'node:url';
+import { openSystemBrowser } from './lib/open-system-browser.mjs';
 
 function arg(name, fallback = null) {
   const i = process.argv.indexOf(`--${name}`);
@@ -976,8 +977,7 @@ server.listen(portArg, '127.0.0.1', () => {
     console.log('Waiting for the user to choose in the browser (Ctrl-C aborts)...');
   }
   if (!hasFlag('no-open')) {
-    const opener = process.platform === 'darwin' ? 'open' : process.platform === 'win32' ? 'start' : 'xdg-open';
-    try { spawn(opener, [url], { stdio: 'ignore', detached: true }).unref(); } catch { /* URL printed anyway */ }
+    openSystemBrowser(url);
   }
   if (timeoutSec > 0) {
     setTimeout(() => {
diff --git a/.cursor/skills/impeccable/scripts/lib/open-system-browser.mjs b/.cursor/skills/impeccable/scripts/lib/open-system-browser.mjs
new file mode 100644
index 000000000..c44cd847a
--- /dev/null
+++ b/.cursor/skills/impeccable/scripts/lib/open-system-browser.mjs
@@ -0,0 +1,26 @@
+import { spawn } from 'node:child_process';
+
+export function browserOpenCommand(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+} = {}) {
+  if (platform === 'darwin') return { command: 'open', args: [url] };
+  if (platform === 'win32') return { command: comspec, args: ['/c', 'start', '', url] };
+  return { command: 'xdg-open', args: [url] };
+}
+
+export function openSystemBrowser(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+  spawnImpl = spawn,
+} = {}) {
+  const { command, args } = browserOpenCommand(url, { platform, comspec });
+  try {
+    const child = spawnImpl(command, args, { stdio: 'ignore', detached: true });
+    child.on('error', () => {});
+    child.unref();
+    return true;
+  } catch {
+    return false;
+  }
+}
diff --git a/.cursor/skills/impeccable/scripts/serve-question.mjs b/.cursor/skills/impeccable/scripts/serve-question.mjs
index 25beaa759..2d8c24a6a 100644
--- a/.cursor/skills/impeccable/scripts/serve-question.mjs
+++ b/.cursor/skills/impeccable/scripts/serve-question.mjs
@@ -79,6 +79,7 @@ import fs from 'node:fs';
 import path from 'node:path';
 import { spawn } from 'node:child_process';
 import { fileURLToPath } from 'node:url';
+import { openSystemBrowser } from './lib/open-system-browser.mjs';
 
 function arg(name, fallback = null) {
   const i = process.argv.indexOf(`--${name}`);
@@ -976,8 +977,7 @@ server.listen(portArg, '127.0.0.1', () => {
     console.log('Waiting for the user to choose in the browser (Ctrl-C aborts)...');
   }
   if (!hasFlag('no-open')) {
-    const opener = process.platform === 'darwin' ? 'open' : process.platform === 'win32' ? 'start' : 'xdg-open';
-    try { spawn(opener, [url], { stdio: 'ignore', detached: true }).unref(); } catch { /* URL printed anyway */ }
+    openSystemBrowser(url);
   }
   if (timeoutSec > 0) {
     setTimeout(() => {
diff --git a/.gemini/skills/impeccable/scripts/lib/open-system-browser.mjs b/.gemini/skills/impeccable/scripts/lib/open-system-browser.mjs
new file mode 100644
index 000000000..c44cd847a
--- /dev/null
+++ b/.gemini/skills/impeccable/scripts/lib/open-system-browser.mjs
@@ -0,0 +1,26 @@
+import { spawn } from 'node:child_process';
+
+export function browserOpenCommand(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+} = {}) {
+  if (platform === 'darwin') return { command: 'open', args: [url] };
+  if (platform === 'win32') return { command: comspec, args: ['/c', 'start', '', url] };
+  return { command: 'xdg-open', args: [url] };
+}
+
+export function openSystemBrowser(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+  spawnImpl = spawn,
+} = {}) {
+  const { command, args } = browserOpenCommand(url, { platform, comspec });
+  try {
+    const child = spawnImpl(command, args, { stdio: 'ignore', detached: true });
+    child.on('error', () => {});
+    child.unref();
+    return true;
+  } catch {
+    return false;
+  }
+}
diff --git a/.gemini/skills/impeccable/scripts/serve-question.mjs b/.gemini/skills/impeccable/scripts/serve-question.mjs
index 25beaa759..2d8c24a6a 100644
--- a/.gemini/skills/impeccable/scripts/serve-question.mjs
+++ b/.gemini/skills/impeccable/scripts/serve-question.mjs
@@ -79,6 +79,7 @@ import fs from 'node:fs';
 import path from 'node:path';
 import { spawn } from 'node:child_process';
 import { fileURLToPath } from 'node:url';
+import { openSystemBrowser } from './lib/open-system-browser.mjs';
 
 function arg(name, fallback = null) {
   const i = process.argv.indexOf(`--${name}`);
@@ -976,8 +977,7 @@ server.listen(portArg, '127.0.0.1', () => {
     console.log('Waiting for the user to choose in the browser (Ctrl-C aborts)...');
   }
   if (!hasFlag('no-open')) {
-    const opener = process.platform === 'darwin' ? 'open' : process.platform === 'win32' ? 'start' : 'xdg-open';
-    try { spawn(opener, [url], { stdio: 'ignore', detached: true }).unref(); } catch { /* URL printed anyway */ }
+    openSystemBrowser(url);
   }
   if (timeoutSec > 0) {
     setTimeout(() => {
diff --git a/.github/skills/impeccable/scripts/lib/open-system-browser.mjs b/.github/skills/impeccable/scripts/lib/open-system-browser.mjs
new file mode 100644
index 000000000..c44cd847a
--- /dev/null
+++ b/.github/skills/impeccable/scripts/lib/open-system-browser.mjs
@@ -0,0 +1,26 @@
+import { spawn } from 'node:child_process';
+
+export function browserOpenCommand(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+} = {}) {
+  if (platform === 'darwin') return { command: 'open', args: [url] };
+  if (platform === 'win32') return { command: comspec, args: ['/c', 'start', '', url] };
+  return { command: 'xdg-open', args: [url] };
+}
+
+export function openSystemBrowser(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+  spawnImpl = spawn,
+} = {}) {
+  const { command, args } = browserOpenCommand(url, { platform, comspec });
+  try {
+    const child = spawnImpl(command, args, { stdio: 'ignore', detached: true });
+    child.on('error', () => {});
+    child.unref();
+    return true;
+  } catch {
+    return false;
+  }
+}
diff --git a/.github/skills/impeccable/scripts/serve-question.mjs b/.github/skills/impeccable/scripts/serve-question.mjs
index 25beaa759..2d8c24a6a 100644
--- a/.github/skills/impeccable/scripts/serve-question.mjs
+++ b/.github/skills/impeccable/scripts/serve-question.mjs
@@ -79,6 +79,7 @@ import fs from 'node:fs';
 import path from 'node:path';
 import { spawn } from 'node:child_process';
 import { fileURLToPath } from 'node:url';
+import { openSystemBrowser } from './lib/open-system-browser.mjs';
 
 function arg(name, fallback = null) {
   const i = process.argv.indexOf(`--${name}`);
@@ -976,8 +977,7 @@ server.listen(portArg, '127.0.0.1', () => {
     console.log('Waiting for the user to choose in the browser (Ctrl-C aborts)...');
   }
   if (!hasFlag('no-open')) {
-    const opener = process.platform === 'darwin' ? 'open' : process.platform === 'win32' ? 'start' : 'xdg-open';
-    try { spawn(opener, [url], { stdio: 'ignore', detached: true }).unref(); } catch { /* URL printed anyway */ }
+    openSystemBrowser(url);
   }
   if (timeoutSec > 0) {
     setTimeout(() => {
diff --git a/.grok/skills/impeccable/scripts/lib/open-system-browser.mjs b/.grok/skills/impeccable/scripts/lib/open-system-browser.mjs
new file mode 100644
index 000000000..c44cd847a
--- /dev/null
+++ b/.grok/skills/impeccable/scripts/lib/open-system-browser.mjs
@@ -0,0 +1,26 @@
+import { spawn } from 'node:child_process';
+
+export function browserOpenCommand(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+} = {}) {
+  if (platform === 'darwin') return { command: 'open', args: [url] };
+  if (platform === 'win32') return { command: comspec, args: ['/c', 'start', '', url] };
+  return { command: 'xdg-open', args: [url] };
+}
+
+export function openSystemBrowser(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+  spawnImpl = spawn,
+} = {}) {
+  const { command, args } = browserOpenCommand(url, { platform, comspec });
+  try {
+    const child = spawnImpl(command, args, { stdio: 'ignore', detached: true });
+    child.on('error', () => {});
+    child.unref();
+    return true;
+  } catch {
+    return false;
+  }
+}
diff --git a/.grok/skills/impeccable/scripts/serve-question.mjs b/.grok/skills/impeccable/scripts/serve-question.mjs
index 25beaa759..2d8c24a6a 100644
--- a/.grok/skills/impeccable/scripts/serve-question.mjs
+++ b/.grok/skills/impeccable/scripts/serve-question.mjs
@@ -79,6 +79,7 @@ import fs from 'node:fs';
 import path from 'node:path';
 import { spawn } from 'node:child_process';
 import { fileURLToPath } from 'node:url';
+import { openSystemBrowser } from './lib/open-system-browser.mjs';
 
 function arg(name, fallback = null) {
   const i = process.argv.indexOf(`--${name}`);
@@ -976,8 +977,7 @@ server.listen(portArg, '127.0.0.1', () => {
     console.log('Waiting for the user to choose in the browser (Ctrl-C aborts)...');
   }
   if (!hasFlag('no-open')) {
-    const opener = process.platform === 'darwin' ? 'open' : process.platform === 'win32' ? 'start' : 'xdg-open';
-    try { spawn(opener, [url], { stdio: 'ignore', detached: true }).unref(); } catch { /* URL printed anyway */ }
+    openSystemBrowser(url);
   }
   if (timeoutSec > 0) {
     setTimeout(() => {
diff --git a/.kiro/skills/impeccable/scripts/lib/open-system-browser.mjs b/.kiro/skills/impeccable/scripts/lib/open-system-browser.mjs
new file mode 100644
index 000000000..c44cd847a
--- /dev/null
+++ b/.kiro/skills/impeccable/scripts/lib/open-system-browser.mjs
@@ -0,0 +1,26 @@
+import { spawn } from 'node:child_process';
+
+export function browserOpenCommand(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+} = {}) {
+  if (platform === 'darwin') return { command: 'open', args: [url] };
+  if (platform === 'win32') return { command: comspec, args: ['/c', 'start', '', url] };
+  return { command: 'xdg-open', args: [url] };
+}
+
+export function openSystemBrowser(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+  spawnImpl = spawn,
+} = {}) {
+  const { command, args } = browserOpenCommand(url, { platform, comspec });
+  try {
+    const child = spawnImpl(command, args, { stdio: 'ignore', detached: true });
+    child.on('error', () => {});
+    child.unref();
+    return true;
+  } catch {
+    return false;
+  }
+}
diff --git a/.kiro/skills/impeccable/scripts/serve-question.mjs b/.kiro/skills/impeccable/scripts/serve-question.mjs
index 25beaa759..2d8c24a6a 100644
--- a/.kiro/skills/impeccable/scripts/serve-question.mjs
+++ b/.kiro/skills/impeccable/scripts/serve-question.mjs
@@ -79,6 +79,7 @@ import fs from 'node:fs';
 import path from 'node:path';
 import { spawn } from 'node:child_process';
 import { fileURLToPath } from 'node:url';
+import { openSystemBrowser } from './lib/open-system-browser.mjs';
 
 function arg(name, fallback = null) {
   const i = process.argv.indexOf(`--${name}`);
@@ -976,8 +977,7 @@ server.listen(portArg, '127.0.0.1', () => {
     console.log('Waiting for the user to choose in the browser (Ctrl-C aborts)...');
   }
   if (!hasFlag('no-open')) {
-    const opener = process.platform === 'darwin' ? 'open' : process.platform === 'win32' ? 'start' : 'xdg-open';
-    try { spawn(opener, [url], { stdio: 'ignore', detached: true }).unref(); } catch { /* URL printed anyway */ }
+    openSystemBrowser(url);
   }
   if (timeoutSec > 0) {
     setTimeout(() => {
diff --git a/.opencode/skills/impeccable/scripts/lib/open-system-browser.mjs b/.opencode/skills/impeccable/scripts/lib/open-system-browser.mjs
new file mode 100644
index 000000000..c44cd847a
--- /dev/null
+++ b/.opencode/skills/impeccable/scripts/lib/open-system-browser.mjs
@@ -0,0 +1,26 @@
+import { spawn } from 'node:child_process';
+
+export function browserOpenCommand(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+} = {}) {
+  if (platform === 'darwin') return { command: 'open', args: [url] };
+  if (platform === 'win32') return { command: comspec, args: ['/c', 'start', '', url] };
+  return { command: 'xdg-open', args: [url] };
+}
+
+export function openSystemBrowser(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+  spawnImpl = spawn,
+} = {}) {
+  const { command, args } = browserOpenCommand(url, { platform, comspec });
+  try {
+    const child = spawnImpl(command, args, { stdio: 'ignore', detached: true });
+    child.on('error', () => {});
+    child.unref();
+    return true;
+  } catch {
+    return false;
+  }
+}
diff --git a/.opencode/skills/impeccable/scripts/serve-question.mjs b/.opencode/skills/impeccable/scripts/serve-question.mjs
index 25beaa759..2d8c24a6a 100644
--- a/.opencode/skills/impeccable/scripts/serve-question.mjs
+++ b/.opencode/skills/impeccable/scripts/serve-question.mjs
@@ -79,6 +79,7 @@ import fs from 'node:fs';
 import path from 'node:path';
 import { spawn } from 'node:child_process';
 import { fileURLToPath } from 'node:url';
+import { openSystemBrowser } from './lib/open-system-browser.mjs';
 
 function arg(name, fallback = null) {
   const i = process.argv.indexOf(`--${name}`);
@@ -976,8 +977,7 @@ server.listen(portArg, '127.0.0.1', () => {
     console.log('Waiting for the user to choose in the browser (Ctrl-C aborts)...');
   }
   if (!hasFlag('no-open')) {
-    const opener = process.platform === 'darwin' ? 'open' : process.platform === 'win32' ? 'start' : 'xdg-open';
-    try { spawn(opener, [url], { stdio: 'ignore', detached: true }).unref(); } catch { /* URL printed anyway */ }
+    openSystemBrowser(url);
   }
   if (timeoutSec > 0) {
     setTimeout(() => {
diff --git a/.pi/skills/impeccable/scripts/lib/open-system-browser.mjs b/.pi/skills/impeccable/scripts/lib/open-system-browser.mjs
new file mode 100644
index 000000000..c44cd847a
--- /dev/null
+++ b/.pi/skills/impeccable/scripts/lib/open-system-browser.mjs
@@ -0,0 +1,26 @@
+import { spawn } from 'node:child_process';
+
+export function browserOpenCommand(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+} = {}) {
+  if (platform === 'darwin') return { command: 'open', args: [url] };
+  if (platform === 'win32') return { command: comspec, args: ['/c', 'start', '', url] };
+  return { command: 'xdg-open', args: [url] };
+}
+
+export function openSystemBrowser(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+  spawnImpl = spawn,
+} = {}) {
+  const { command, args } = browserOpenCommand(url, { platform, comspec });
+  try {
+    const child = spawnImpl(command, args, { stdio: 'ignore', detached: true });
+    child.on('error', () => {});
+    child.unref();
+    return true;
+  } catch {
+    return false;
+  }
+}
diff --git a/.pi/skills/impeccable/scripts/serve-question.mjs b/.pi/skills/impeccable/scripts/serve-question.mjs
index 25beaa759..2d8c24a6a 100644
--- a/.pi/skills/impeccable/scripts/serve-question.mjs
+++ b/.pi/skills/impeccable/scripts/serve-question.mjs
@@ -79,6 +79,7 @@ import fs from 'node:fs';
 import path from 'node:path';
 import { spawn } from 'node:child_process';
 import { fileURLToPath } from 'node:url';
+import { openSystemBrowser } from './lib/open-system-browser.mjs';
 
 function arg(name, fallback = null) {
   const i = process.argv.indexOf(`--${name}`);
@@ -976,8 +977,7 @@ server.listen(portArg, '127.0.0.1', () => {
     console.log('Waiting for the user to choose in the browser (Ctrl-C aborts)...');
   }
   if (!hasFlag('no-open')) {
-    const opener = process.platform === 'darwin' ? 'open' : process.platform === 'win32' ? 'start' : 'xdg-open';
-    try { spawn(opener, [url], { stdio: 'ignore', detached: true }).unref(); } catch { /* URL printed anyway */ }
+    openSystemBrowser(url);
   }
   if (timeoutSec > 0) {
     setTimeout(() => {
diff --git a/.qoder/skills/impeccable/scripts/lib/open-system-browser.mjs b/.qoder/skills/impeccable/scripts/lib/open-system-browser.mjs
new file mode 100644
index 000000000..c44cd847a
--- /dev/null
+++ b/.qoder/skills/impeccable/scripts/lib/open-system-browser.mjs
@@ -0,0 +1,26 @@
+import { spawn } from 'node:child_process';
+
+export function browserOpenCommand(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+} = {}) {
+  if (platform === 'darwin') return { command: 'open', args: [url] };
+  if (platform === 'win32') return { command: comspec, args: ['/c', 'start', '', url] };
+  return { command: 'xdg-open', args: [url] };
+}
+
+export function openSystemBrowser(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+  spawnImpl = spawn,
+} = {}) {
+  const { command, args } = browserOpenCommand(url, { platform, comspec });
+  try {
+    const child = spawnImpl(command, args, { stdio: 'ignore', detached: true });
+    child.on('error', () => {});
+    child.unref();
+    return true;
+  } catch {
+    return false;
+  }
+}
diff --git a/.qoder/skills/impeccable/scripts/serve-question.mjs b/.qoder/skills/impeccable/scripts/serve-question.mjs
index 25beaa759..2d8c24a6a 100644
--- a/.qoder/skills/impeccable/scripts/serve-question.mjs
+++ b/.qoder/skills/impeccable/scripts/serve-question.mjs
@@ -79,6 +79,7 @@ import fs from 'node:fs';
 import path from 'node:path';
 import { spawn } from 'node:child_process';
 import { fileURLToPath } from 'node:url';
+import { openSystemBrowser } from './lib/open-system-browser.mjs';
 
 function arg(name, fallback = null) {
   const i = process.argv.indexOf(`--${name}`);
@@ -976,8 +977,7 @@ server.listen(portArg, '127.0.0.1', () => {
     console.log('Waiting for the user to choose in the browser (Ctrl-C aborts)...');
   }
   if (!hasFlag('no-open')) {
-    const opener = process.platform === 'darwin' ? 'open' : process.platform === 'win32' ? 'start' : 'xdg-open';
-    try { spawn(opener, [url], { stdio: 'ignore', detached: true }).unref(); } catch { /* URL printed anyway */ }
+    openSystemBrowser(url);
   }
   if (timeoutSec > 0) {
     setTimeout(() => {
diff --git a/.rovodev/skills/impeccable/scripts/lib/open-system-browser.mjs b/.rovodev/skills/impeccable/scripts/lib/open-system-browser.mjs
new file mode 100644
index 000000000..c44cd847a
--- /dev/null
+++ b/.rovodev/skills/impeccable/scripts/lib/open-system-browser.mjs
@@ -0,0 +1,26 @@
+import { spawn } from 'node:child_process';
+
+export function browserOpenCommand(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+} = {}) {
+  if (platform === 'darwin') return { command: 'open', args: [url] };
+  if (platform === 'win32') return { command: comspec, args: ['/c', 'start', '', url] };
+  return { command: 'xdg-open', args: [url] };
+}
+
+export function openSystemBrowser(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+  spawnImpl = spawn,
+} = {}) {
+  const { command, args } = browserOpenCommand(url, { platform, comspec });
+  try {
+    const child = spawnImpl(command, args, { stdio: 'ignore', detached: true });
+    child.on('error', () => {});
+    child.unref();
+    return true;
+  } catch {
+    return false;
+  }
+}
diff --git a/.rovodev/skills/impeccable/scripts/serve-question.mjs b/.rovodev/skills/impeccable/scripts/serve-question.mjs
index 25beaa759..2d8c24a6a 100644
--- a/.rovodev/skills/impeccable/scripts/serve-question.mjs
+++ b/.rovodev/skills/impeccable/scripts/serve-question.mjs
@@ -79,6 +79,7 @@ import fs from 'node:fs';
 import path from 'node:path';
 import { spawn } from 'node:child_process';
 import { fileURLToPath } from 'node:url';
+import { openSystemBrowser } from './lib/open-system-browser.mjs';
 
 function arg(name, fallback = null) {
   const i = process.argv.indexOf(`--${name}`);
@@ -976,8 +977,7 @@ server.listen(portArg, '127.0.0.1', () => {
     console.log('Waiting for the user to choose in the browser (Ctrl-C aborts)...');
   }
   if (!hasFlag('no-open')) {
-    const opener = process.platform === 'darwin' ? 'open' : process.platform === 'win32' ? 'start' : 'xdg-open';
-    try { spawn(opener, [url], { stdio: 'ignore', detached: true }).unref(); } catch { /* URL printed anyway */ }
+    openSystemBrowser(url);
   }
   if (timeoutSec > 0) {
     setTimeout(() => {
diff --git a/.trae-cn/skills/impeccable/scripts/lib/open-system-browser.mjs b/.trae-cn/skills/impeccable/scripts/lib/open-system-browser.mjs
new file mode 100644
index 000000000..c44cd847a
--- /dev/null
+++ b/.trae-cn/skills/impeccable/scripts/lib/open-system-browser.mjs
@@ -0,0 +1,26 @@
+import { spawn } from 'node:child_process';
+
+export function browserOpenCommand(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+} = {}) {
+  if (platform === 'darwin') return { command: 'open', args: [url] };
+  if (platform === 'win32') return { command: comspec, args: ['/c', 'start', '', url] };
+  return { command: 'xdg-open', args: [url] };
+}
+
+export function openSystemBrowser(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+  spawnImpl = spawn,
+} = {}) {
+  const { command, args } = browserOpenCommand(url, { platform, comspec });
+  try {
+    const child = spawnImpl(command, args, { stdio: 'ignore', detached: true });
+    child.on('error', () => {});
+    child.unref();
+    return true;
+  } catch {
+    return false;
+  }
+}
diff --git a/.trae-cn/skills/impeccable/scripts/serve-question.mjs b/.trae-cn/skills/impeccable/scripts/serve-question.mjs
index 25beaa759..2d8c24a6a 100644
--- a/.trae-cn/skills/impeccable/scripts/serve-question.mjs
+++ b/.trae-cn/skills/impeccable/scripts/serve-question.mjs
@@ -79,6 +79,7 @@ import fs from 'node:fs';
 import path from 'node:path';
 import { spawn } from 'node:child_process';
 import { fileURLToPath } from 'node:url';
+import { openSystemBrowser } from './lib/open-system-browser.mjs';
 
 function arg(name, fallback = null) {
   const i = process.argv.indexOf(`--${name}`);
@@ -976,8 +977,7 @@ server.listen(portArg, '127.0.0.1', () => {
     console.log('Waiting for the user to choose in the browser (Ctrl-C aborts)...');
   }
   if (!hasFlag('no-open')) {
-    const opener = process.platform === 'darwin' ? 'open' : process.platform === 'win32' ? 'start' : 'xdg-open';
-    try { spawn(opener, [url], { stdio: 'ignore', detached: true }).unref(); } catch { /* URL printed anyway */ }
+    openSystemBrowser(url);
   }
   if (timeoutSec > 0) {
     setTimeout(() => {
diff --git a/.trae/skills/impeccable/scripts/lib/open-system-browser.mjs b/.trae/skills/impeccable/scripts/lib/open-system-browser.mjs
new file mode 100644
index 000000000..c44cd847a
--- /dev/null
+++ b/.trae/skills/impeccable/scripts/lib/open-system-browser.mjs
@@ -0,0 +1,26 @@
+import { spawn } from 'node:child_process';
+
+export function browserOpenCommand(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+} = {}) {
+  if (platform === 'darwin') return { command: 'open', args: [url] };
+  if (platform === 'win32') return { command: comspec, args: ['/c', 'start', '', url] };
+  return { command: 'xdg-open', args: [url] };
+}
+
+export function openSystemBrowser(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+  spawnImpl = spawn,
+} = {}) {
+  const { command, args } = browserOpenCommand(url, { platform, comspec });
+  try {
+    const child = spawnImpl(command, args, { stdio: 'ignore', detached: true });
+    child.on('error', () => {});
+    child.unref();
+    return true;
+  } catch {
+    return false;
+  }
+}
diff --git a/.trae/skills/impeccable/scripts/serve-question.mjs b/.trae/skills/impeccable/scripts/serve-question.mjs
index 25beaa759..2d8c24a6a 100644
--- a/.trae/skills/impeccable/scripts/serve-question.mjs
+++ b/.trae/skills/impeccable/scripts/serve-question.mjs
@@ -79,6 +79,7 @@ import fs from 'node:fs';
 import path from 'node:path';
 import { spawn } from 'node:child_process';
 import { fileURLToPath } from 'node:url';
+import { openSystemBrowser } from './lib/open-system-browser.mjs';
 
 function arg(name, fallback = null) {
   const i = process.argv.indexOf(`--${name}`);
@@ -976,8 +977,7 @@ server.listen(portArg, '127.0.0.1', () => {
     console.log('Waiting for the user to choose in the browser (Ctrl-C aborts)...');
   }
   if (!hasFlag('no-open')) {
-    const opener = process.platform === 'darwin' ? 'open' : process.platform === 'win32' ? 'start' : 'xdg-open';
-    try { spawn(opener, [url], { stdio: 'ignore', detached: true }).unref(); } catch { /* URL printed anyway */ }
+    openSystemBrowser(url);
   }
   if (timeoutSec > 0) {
     setTimeout(() => {
diff --git a/.vibe/skills/impeccable/scripts/lib/open-system-browser.mjs b/.vibe/skills/impeccable/scripts/lib/open-system-browser.mjs
new file mode 100644
index 000000000..c44cd847a
--- /dev/null
+++ b/.vibe/skills/impeccable/scripts/lib/open-system-browser.mjs
@@ -0,0 +1,26 @@
+import { spawn } from 'node:child_process';
+
+export function browserOpenCommand(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+} = {}) {
+  if (platform === 'darwin') return { command: 'open', args: [url] };
+  if (platform === 'win32') return { command: comspec, args: ['/c', 'start', '', url] };
+  return { command: 'xdg-open', args: [url] };
+}
+
+export function openSystemBrowser(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+  spawnImpl = spawn,
+} = {}) {
+  const { command, args } = browserOpenCommand(url, { platform, comspec });
+  try {
+    const child = spawnImpl(command, args, { stdio: 'ignore', detached: true });
+    child.on('error', () => {});
+    child.unref();
+    return true;
+  } catch {
+    return false;
+  }
+}
diff --git a/.vibe/skills/impeccable/scripts/serve-question.mjs b/.vibe/skills/impeccable/scripts/serve-question.mjs
index 25beaa759..2d8c24a6a 100644
--- a/.vibe/skills/impeccable/scripts/serve-question.mjs
+++ b/.vibe/skills/impeccable/scripts/serve-question.mjs
@@ -79,6 +79,7 @@ import fs from 'node:fs';
 import path from 'node:path';
 import { spawn } from 'node:child_process';
 import { fileURLToPath } from 'node:url';
+import { openSystemBrowser } from './lib/open-system-browser.mjs';
 
 function arg(name, fallback = null) {
   const i = process.argv.indexOf(`--${name}`);
@@ -976,8 +977,7 @@ server.listen(portArg, '127.0.0.1', () => {
     console.log('Waiting for the user to choose in the browser (Ctrl-C aborts)...');
   }
   if (!hasFlag('no-open')) {
-    const opener = process.platform === 'darwin' ? 'open' : process.platform === 'win32' ? 'start' : 'xdg-open';
-    try { spawn(opener, [url], { stdio: 'ignore', detached: true }).unref(); } catch { /* URL printed anyway */ }
+    openSystemBrowser(url);
   }
   if (timeoutSec > 0) {
     setTimeout(() => {
diff --git a/plugin/skills/impeccable/scripts/lib/open-system-browser.mjs b/plugin/skills/impeccable/scripts/lib/open-system-browser.mjs
new file mode 100644
index 000000000..c44cd847a
--- /dev/null
+++ b/plugin/skills/impeccable/scripts/lib/open-system-browser.mjs
@@ -0,0 +1,26 @@
+import { spawn } from 'node:child_process';
+
+export function browserOpenCommand(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+} = {}) {
+  if (platform === 'darwin') return { command: 'open', args: [url] };
+  if (platform === 'win32') return { command: comspec, args: ['/c', 'start', '', url] };
+  return { command: 'xdg-open', args: [url] };
+}
+
+export function openSystemBrowser(url, {
+  platform = process.platform,
+  comspec = process.env.ComSpec || process.env.COMSPEC || 'cmd.exe',
+  spawnImpl = spawn,
+} = {}) {
+  const { command, args } = browserOpenCommand(url, { platform, comspec });
+  try {
+    const child = spawnImpl(command, args, { stdio: 'ignore', detached: true });
+    child.on('error', () => {});
+    child.unref();
+    return true;
+  } catch {
+    return false;
+  }
+}
diff --git a/plugin/skills/impeccable/scripts/serve-question.mjs b/plugin/skills/impeccable/scripts/serve-question.mjs
index 25beaa759..2d8c24a6a 100644
--- a/plugin/skills/impeccable/scripts/serve-question.mjs
+++ b/plugin/skills/impeccable/scripts/serve-question.mjs
@@ -79,6 +79,7 @@ import fs from 'node:fs';
 import path from 'node:path';
 import { spawn } from 'node:child_process';
 import { fileURLToPath } from 'node:url';
+import { openSystemBrowser } from './lib/open-system-browser.mjs';
 
 function arg(name, fallback = null) {
   const i = process.argv.indexOf(`--${name}`);
@@ -976,8 +977,7 @@ server.listen(portArg, '127.0.0.1', () => {
     console.log('Waiting for the user to choose in the browser (Ctrl-C aborts)...');
   }
   if (!hasFlag('no-open')) {
-    const opener = process.platform === 'darwin' ? 'open' : process.platform === 'win32' ? 'start' : 'xdg-open';
-    try { spawn(opener, [url], { stdio: 'ignore', detached: true }).unref(); } catch { /* URL printed anyway */ }
+    openSystemBrowser(url);
   }
   if (timeoutSec > 0) {
     setTimeout(() => {