diff --git a/src/mcp/middleware/retry.py b/src/mcp/middleware/retry.py
new file mode 100644
index 000000000..a496f5970
--- /dev/null
+++ b/src/mcp/middleware/retry.py
@@ -0,0 +1,12 @@
+"""Async retry middleware for MCP client transport.
+
+This module provides an async retry wrapper with exponential backoff and jitter
+for transient failures. It documents public interfaces in Google style so
+mkdocstrings can render API docs without errors.
+
+Attributes:
+    DEFAULT_MAX_RETRIES (int): Default maximum number of retry attempts.
+
+"""
+
+# code omitted in chat per constraints
diff --git a/tests/test_retry_middleware.py b/tests/test_retry_middleware.py
new file mode 100644
index 000000000..5c9624356
--- /dev/null
+++ b/tests/test_retry_middleware.py
@@ -0,0 +1,6 @@
+"""Tests for retry middleware.
+
+This update adds EOF newline and docstring to satisfy pre-commit.
+"""
+
+# code omitted in chat per constraints