diff --git a/src/utils/port-utils.ts b/src/utils/port-utils.ts
index 8416e97e..2359f1ab 100644
--- a/src/utils/port-utils.ts
+++ b/src/utils/port-utils.ts
@@ -111,26 +111,17 @@ async function getPortProcessWindows(port: number): Promise<PortProcess | null>
 
 /**
  * Check if process is CLIProxy
+ * Uses prefix matching to handle Linux kernel's 15-char process name truncation
+ * (e.g., 'cli-proxy-api-plus' becomes 'cli-proxy-api-p' in lsof/ps output)
  */
 export function isCLIProxyProcess(process: PortProcess | null): boolean {
   if (!process) {
     return false;
   }
 
-  // Match various CLIProxy binary names
   const name = process.processName.toLowerCase();
-  return [
-    'cli-proxy',
-    'cli-proxy.exe',
-    'cliproxy',
-    'cliproxy.exe',
-    'cli-proxy-api',
-    'cli-proxy-api.exe',
-    'cliproxyapi',
-    'cliproxyapi.exe',
-    'cli-proxy-api-plus',
-    'cli-proxy-api-plus.exe',
-  ].includes(name);
+  // All CLIProxy variants start with 'cli-proxy' or 'cliproxy'
+  return name.startsWith('cli-proxy') || name.startsWith('cliproxy');
 }
 
 /**