diff --git a/.fido-undo.json b/.fido-undo.json
new file mode 100644
index 0000000..65a0b3e
--- /dev/null
+++ b/.fido-undo.json
@@ -0,0 +1,11 @@
+[
+  {
+    "op": "CREATE",
+    "path": "tmp-cfg-test.mjs",
+    "content": "import { ROOT_DIR } from './src/config.js';\nconsole.log('ROOT_DIR =', ROOT_DIR);\n"
+  },
+  {
+    "op": "DELETE",
+    "path": "tmp-cfg-test.mjs"
+  }
+]
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..cf72f23
--- /dev/null
+++ b/README.md
@@ -0,0 +1,8 @@
+**FIDO** a minimal coding assistant.
+
+Fido is a console REPL assistant that inspects files, lists directories, searches file
+contents, applies changes, and runs shell commands (with user approval).
+
+## License
+
+[0BSD](https://opensource.org/license/0bsd)