diff --git a/dot_pi/agent/extensions/default-tools.ts b/dot_pi/agent/extensions/default-tools.ts
new file mode 100644
index 00000000..d950aefb
--- /dev/null
+++ b/dot_pi/agent/extensions/default-tools.ts
@@ -0,0 +1,18 @@
+/**
+ * Enable All Built-in Tools
+ *
+ * Activates grep (rg) and find (fd) tools on session start,
+ * in addition to the default read, bash, edit, write.
+ */
+
+import type { ExtensionAPI } from "@mariozechner/pi-coding-agent";
+
+export default function defaultTools(pi: ExtensionAPI) {
+  pi.on("session_start", () => {
+    const current = new Set(pi.getActiveTools());
+    current.add("grep");
+    current.add("find");
+
+    pi.setActiveTools(Array.from(current));
+  });
+}