diff --git a/package.json b/package.json
index 066eeaf..d6bf0d4 100644
--- a/package.json
+++ b/package.json
@@ -52,7 +52,7 @@
     "commands": "./lib/commands",
     "bin": "sf",
     "hooks": {
-      "prerun": "./lib/hooks/telemetryPrerun.js"
+      "prerun": "./lib/hooks/telemetryPrerun"
     },
     "devPlugins": [
       "@oclif/plugin-help",
diff --git a/schemas/telemetry.json b/schemas/telemetry.json
new file mode 100644
index 0000000..aa38bef
--- /dev/null
+++ b/schemas/telemetry.json
@@ -0,0 +1,25 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "$ref": "#/definitions/TelemetryGetResult",
+  "definitions": {
+    "TelemetryGetResult": {
+      "type": "object",
+      "properties": {
+        "enabled": {
+          "type": "boolean"
+        },
+        "cliId": {
+          "type": "string"
+        },
+        "tmpDir": {
+          "type": "string"
+        },
+        "cacheDir": {
+          "type": "string"
+        }
+      },
+      "required": ["enabled", "tmpDir", "cacheDir"],
+      "additionalProperties": false
+    }
+  }
+}