add more codex logic

scratch.ts

@@ -0,0 +1,16 @@
+import { spawnSync } from "child_process";
+import { existsSync } from "fs";
+
+function findCliPath(name: string): string | null {
+    
+      const result = spawnSync("which", [name], { encoding: "utf-8" });
+      if (result.status === 0 && result.stdout) {
+        const cliPath = result.stdout.trim();
+        if (cliPath && existsSync(cliPath)) {
+          return cliPath;
+        }
+      }
+    return null;
+  }
+  
+console.log(findCliPath("codei"));