From 5872297f33948ce7c6203962f8a3fd5d36af3c63 Mon Sep 17 00:00:00 2001
From: Minu Hong <32614113+minuhong-aws@users.noreply.github.com>
Date: Mon, 17 Mar 2025 15:32:07 -0700
Subject: [PATCH] Update README.md

Updated KCL v1 readme page
---
 README.md | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/README.md b/README.md
index 9de88dfe..1eca4d8a 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,11 @@
+> [!IMPORTANT] 
+> # Kinesis Client Library (KCL) 1.x will reach end-of-support on January 30, 2026
+> Amazon Kinesis Client Library (KCL) 1.x will reach end-of-support on January 30, 2026. Accordingly, these versions will enter maintenance mode on April 17, 2025. During maintenance mode, AWS will provide updates only for critical bug fixes and security issues. Major versions in maintenance mode will not receive updates for new features or feature enhancements. If you’re using KCL 1.x, we recommend migrating to the latest versions. When migrating from KCL 1.x to 3.x, you will need to update interfaces and security credential providers in your application. For details about the end-of-support notice and required actions, see the following links:
+> 
+> * [AWS Blog: Announcing end-of-support for Amazon Kinesis Client Library 1.x and Amazon Kinesis Producer Library 0.x effective January 30, 2026](https://aws.amazon.com/blogs/big-data/announcing-end-of-support-for-amazon-kinesis-client-library-1-x-and-amazon-kinesis-producer-library-0-x-effective-january-30-2026/)
+> * [Kinesis documentation: KCL version lifecycle policy](https://docs.aws.amazon.com/streams/latest/dev/kcl-version-lifecycle-policy.html)
+> * [Kinesis documentation: Migrating from KCL 1.x to KCL 3.x](https://docs.aws.amazon.com/streams/latest/dev/kcl-migration-1-3.html) 
+
 # Bugs in 1.14.0 version
 We recommend customers to migrate to 1.14.1 to avoid [known bugs](https://github.com/awslabs/amazon-kinesis-client/issues/778) in 1.14.0 version