diff --git a/src/main/browser/agent-browser-bridge.ts b/src/main/browser/agent-browser-bridge.ts
index 4b358ecb7de..9e1d25f84c0 100644
--- a/src/main/browser/agent-browser-bridge.ts
+++ b/src/main/browser/agent-browser-bridge.ts
@@ -2055,7 +2055,12 @@ export class AgentBrowserBridge {
       args.push('--cdp', String(port))
     }
 
-    args.push(...commandArgs, '--json')
+    // Why: exec passthrough can produce a large argv array; spreading it into
+    // push risks V8 argument limits before execFile receives the command.
+    for (const commandArg of commandArgs) {
+      args.push(commandArg)
+    }
+    args.push('--json')
 
     const stdout = await this.runAgentBrowserRaw(sessionName, args, execOptions)
     const translated = translateResult(stdout)