diff --git a/test-dir/AGENTS.md b/test-dir/AGENTS.md
new file mode 100644
index 00000000..0da143c5
--- /dev/null
+++ b/test-dir/AGENTS.md
@@ -0,0 +1,4 @@
+## Root Level Rules
+
+- Root rule 1
+- Root rule 2
diff --git a/test-dir/another.ts b/test-dir/another.ts
new file mode 100644
index 00000000..0ee14845
--- /dev/null
+++ b/test-dir/another.ts
@@ -0,0 +1,3 @@
+export const config = {
+  strict: true
+}
diff --git a/test-dir/nested/AGENTS.md b/test-dir/nested/AGENTS.md
new file mode 100644
index 00000000..3b060ac6
--- /dev/null
+++ b/test-dir/nested/AGENTS.md
@@ -0,0 +1,4 @@
+## Nested Level Rules
+
+- Nested rule 1 (더 specific)
+- Nested rule 2
diff --git a/test-dir/nested/deep.ts b/test-dir/nested/deep.ts
new file mode 100644
index 00000000..83ad71d8
--- /dev/null
+++ b/test-dir/nested/deep.ts
@@ -0,0 +1 @@
+export const deep = true
diff --git a/test-dir/test.ts b/test-dir/test.ts
new file mode 100644
index 00000000..d50420c8
--- /dev/null
+++ b/test-dir/test.ts
@@ -0,0 +1,3 @@
+export function greet(name: string): string {
+  return `Hello, ${name}!`
+}