diff --git a/run/core/deployment-orchestrator.ts b/run/core/deployment-orchestrator.ts
index 279161e..14ee8bb 100644
--- a/run/core/deployment-orchestrator.ts
+++ b/run/core/deployment-orchestrator.ts
@@ -27,6 +27,22 @@ import { promisify } from 'node:util';
 
 const execAsync = promisify(exec);
 
+/**
+ * Find the PID of a process listening on a given port.
+ * Uses `ss` (Linux) to find the listener, returns null if no process found.
+ */
+async function getPortPid(port: number): Promise<number | null> {
+  try {
+    const { stdout } = await execAsync(
+      `ss -tlnp sport = :${port} 2>/dev/null | grep -oP 'pid=\\K[0-9]+'`
+    );
+    const pid = parseInt(stdout.trim().split('\n')[0], 10);
+    return isNaN(pid) ? null : pid;
+  } catch {
+    return null;
+  }
+}
+
 export interface DeploymentOrchestratorOptions {
   deploymentName: string;
   environment?: Environment;