diff --git a/packages/cli/src/config/acp-channel-fallback.test.ts b/packages/cli/src/config/acp-channel-fallback.test.ts
index 4c5526c7c19..f10095a9399 100644
--- a/packages/cli/src/config/acp-channel-fallback.test.ts
+++ b/packages/cli/src/config/acp-channel-fallback.test.ts
@@ -35,11 +35,11 @@ describe('resolveAcpChannelFallback', () => {
     ).toBe('desktop');
   });
 
-  it('ignores empty marker values', () => {
+  it.each(['', '0', 'false'])('ignores marker value %j', (value) => {
     expect(
       resolveAcpChannelFallback({
-        [QWEN_CODE_SERVE_ENV]: '',
-        [QWEN_CODE_DESKTOP_ENV]: '',
+        [QWEN_CODE_SERVE_ENV]: value,
+        [QWEN_CODE_DESKTOP_ENV]: value,
       }),
     ).toBe('ACP');
   });
diff --git a/packages/cli/src/config/acp-channel-fallback.ts b/packages/cli/src/config/acp-channel-fallback.ts
index 6acebe9f1f7..9b0b0a0d1fe 100644
--- a/packages/cli/src/config/acp-channel-fallback.ts
+++ b/packages/cli/src/config/acp-channel-fallback.ts
@@ -29,10 +29,10 @@ export function resolveAcpChannelFallback(
 ): string {
   // The desktop marker wins: Tauri sessions are daemon-spawned too, but the
   // launcher identity is the finer-grained signal.
-  if (env[QWEN_CODE_DESKTOP_ENV]) {
+  if (env[QWEN_CODE_DESKTOP_ENV] === '1') {
     return 'desktop';
   }
-  if (env[QWEN_CODE_SERVE_ENV]) {
+  if (env[QWEN_CODE_SERVE_ENV] === '1') {
     return 'daemon';
   }
   return 'ACP';