diff --git a/openless-all/app/scripts/voice-edit-open-dispatch-contract.test.mjs b/openless-all/app/scripts/voice-edit-open-dispatch-contract.test.mjs
new file mode 100644
index 000000000..e800295f3
--- /dev/null
+++ b/openless-all/app/scripts/voice-edit-open-dispatch-contract.test.mjs
@@ -0,0 +1,54 @@
+// Regression contract for the Windows WebView-creation dispatch boundary.
+// This source contract cannot reproduce a native event-loop deadlock: Actions
+// must also compile the real host. Source checks are not native installation acceptance.
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { readFileSync } from 'node:fs';
+
+const read = (relative) => readFileSync(new URL(relative, import.meta.url), 'utf8').replace(/\r\n/g, '\n');
+const command = read('../src-tauri/src/commands/voice_edit.rs');
+
+
+function openCommand(source) {
+  const start = source.indexOf('pub async fn voice_edit_window_open(');
+  assert.notEqual(start, -1, 'window creation must not run inside a synchronous IPC command');
+  const end = source.indexOf('\n#[tauri::command]', start);
+  assert.notEqual(end, -1, 'the next command must bound extraction');
+  return source.slice(start, end);
+}
+
+test('voice edit creation leaves the synchronous IPC handler and retains main-only authorization', () => {
+  const body = openCommand(command);
+  assert.match(body, /window\.label\(\) != "main"/);
+  assert.match(body, /return Err\("Voice Edit can only be opened from the main window"\.to_string\(\)\)/);
+  assert.ok(body.indexOf('return Err(') < body.indexOf('show_voice_edit()'));
+  assert.match(command, /#\[cfg\(target_os = "windows"\)\]\s*#\[tauri::command\]\s*pub async fn voice_edit_window_open\(/);
+  assert.match(body, /show_voice_edit\(\);[\s\S]*Ok\(\(\)\)/);
+  assert.doesNotMatch(body, /start_voice_edit_session\(/, 'opening must not start or commit a session');
+});
+
+test('non-Windows keeps its synchronous command and main-only presentation contract', () => {
+  assert.match(command, /#\[cfg\(not\(target_os = "windows"\)\)\]\s*#\[tauri::command\]\s*pub fn voice_edit_window_open\(/);
+  const start = command.indexOf('pub fn voice_edit_window_open(');
+  const end = command.indexOf('\n#[tauri::command]', start);
+  assert.ok(start >= 0 && end > start);
+  const body = command.slice(start, end);
+  assert.match(body, /window\.label\(\) != "main"/);
+  assert.ok(body.indexOf('return Err(') < body.indexOf('show_voice_edit()'));
+  assert.match(body, /show_voice_edit\(\);\s*Ok\(\(\)\)/);
+  assert.doesNotMatch(body, /start_voice_edit_session\(|commit_voice_edit/);
+});
+
+for (const newline of ['\n', '\r\n']) {
+  test(`command boundary is stable under ${JSON.stringify(newline)} checkout`, () => {
+    const normalized = command.replace(/\n/g, newline).replace(/\r\n/g, '\n');
+    assert.ok(openCommand(normalized).includes('show_voice_edit()'));
+  });
+}
+
+test('missing boundaries fail and the following unrelated command is excluded', () => {
+  assert.throws(() => openCommand('pub fn voice_edit_window_open() {}'));
+  assert.throws(() => openCommand('pub async fn voice_edit_window_open() {}'));
+  const fixture = 'pub async fn voice_edit_window_open() {}\n#[tauri::command]\npub fn unrelated() { commit_voice_edit(); }';
+  assert.doesNotMatch(openCommand(fixture), /commit_voice_edit/);
+});
diff --git a/openless-all/app/src-tauri/src/commands/voice_edit.rs b/openless-all/app/src-tauri/src/commands/voice_edit.rs
index 2a8f0c4e2..370ae4a3b 100644
--- a/openless-all/app/src-tauri/src/commands/voice_edit.rs
+++ b/openless-all/app/src-tauri/src/commands/voice_edit.rs
@@ -3,6 +3,22 @@ use super::CoordinatorState;
 /// Opens the desktop Voice Edit panel or asks Android's main WebView to show
 /// its embedded equivalent. The session starts only after the panel invokes
 /// `start_voice_edit_session`.
+// WebView2 creation from a synchronous IPC callback can deadlock on Windows.
+// An async command lets that callback return before creating the panel.
+#[cfg(target_os = "windows")]
+#[tauri::command]
+pub async fn voice_edit_window_open(
+    window: tauri::Window,
+    coord: CoordinatorState<'_>,
+) -> Result<(), String> {
+    if window.label() != "main" {
+        return Err("Voice Edit can only be opened from the main window".to_string());
+    }
+    coord.tauri_host().show_voice_edit();
+    Ok(())
+}
+
+#[cfg(not(target_os = "windows"))]
 #[tauri::command]
 pub fn voice_edit_window_open(
     window: tauri::Window,