diff --git a/copilot-sdk b/copilot-sdk
index 27f487f..062b61c 160000
--- a/copilot-sdk
+++ b/copilot-sdk
@@ -1 +1 @@
-Subproject commit 27f487f9a65b7b39dbb96d0a13fbedc9c65cbcb1
+Subproject commit 062b61c8aa63b9b5d45fa1d7b01723e6660ffa83
diff --git a/src/Process/ProcessManager.php b/src/Process/ProcessManager.php
index d6f0b39..763b06d 100644
--- a/src/Process/ProcessManager.php
+++ b/src/Process/ProcessManager.php
@@ -144,7 +144,13 @@ public function getStdioTransport(): StdioTransport
     protected function startProcess(): void
     {
         if (empty($this->cliPath)) {
-            $this->cliPath = (new ExecutableFinder)->find(name: 'copilot', default: 'copilot');
+            $this->cliPath = (new ExecutableFinder)->find(name: 'copilot');
+        }
+
+        if (empty($this->cliPath)) {
+            throw new RuntimeException(
+                'Path to Copilot CLI is required. Please provide it via the cli_path option, or use cli_url to rely on a remote CLI.',
+            );
         }
 
         // Handle 'gh copilot' case