diff --git a/CHANGELOG.md b/CHANGELOG.md
index 29e6b6281..1404ba336 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
 > **Upstream sync:** [`github/copilot-sdk@062b61c`](https://github.com/github/copilot-sdk/commit/062b61c8aa63b9b5d45fa1d7b01723e6660ffa83)
 
+### Notice
+
+- **This repository is now archived.** The official GitHub Copilot SDK for Java is maintained at [github/copilot-sdk-java](https://github.com/github/copilot-sdk-java). No further changes or releases will be made in this repository.
+
 ## [1.0.11] - 2026-03-12
 
 > **Upstream sync:** [`github/copilot-sdk@062b61c`](https://github.com/github/copilot-sdk/commit/062b61c8aa63b9b5d45fa1d7b01723e6660ffa83)
diff --git a/README.md b/README.md
index 1463a61af..d4b0a54ab 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # Copilot SDK for Java
 
+> 🚨 **This repository is archived.** The official GitHub Copilot SDK for Java is now maintained at **[github/copilot-sdk-java](https://github.com/github/copilot-sdk-java)**. No further changes or releases will be made here. Please use the official SDK going forward.
+
 [![Build](https://github.com/copilot-community-sdk/copilot-sdk-java/actions/workflows/build-test.yml/badge.svg)](https://github.com/copilot-community-sdk/copilot-sdk-java/actions/workflows/build-test.yml)
 [![Site](https://github.com/copilot-community-sdk/copilot-sdk-java/actions/workflows/deploy-site.yml/badge.svg)](https://github.com/copilot-community-sdk/copilot-sdk-java/actions/workflows/deploy-site.yml)
 [![Coverage](.github/badges/jacoco.svg)](https://copilot-community-sdk.github.io/copilot-sdk-java/snapshot/jacoco/index.html)
@@ -16,8 +18,6 @@
 
 ## Background
 
-> ⚠️ **Disclaimer:** This is an **unofficial, community-driven SDK** and is **not supported or endorsed by GitHub**. This SDK may change in breaking ways. Use at your own risk.
-
 Java SDK for programmatic control of GitHub Copilot CLI, enabling you to build AI-powered applications and agentic workflows.
 
 ## Installation
diff --git a/src/site/markdown/advanced.md b/src/site/markdown/advanced.md
index 41e122d5c..926df5d72 100644
--- a/src/site/markdown/advanced.md
+++ b/src/site/markdown/advanced.md
@@ -1,6 +1,6 @@
 # Advanced Usage
 
-> ⚠️ **Disclaimer:** This is an **unofficial, community-driven SDK** and is **not supported or endorsed by GitHub**. Use at your own risk.
+> 🚨 **This repository is archived.** The official GitHub Copilot SDK for Java is now maintained at **[github/copilot-sdk-java](https://github.com/github/copilot-sdk-java)**. No further changes or releases will be made here. Please use the official SDK going forward.
 
 This guide covers advanced scenarios for extending and customizing your Copilot integration.
 
diff --git a/src/site/markdown/documentation.md b/src/site/markdown/documentation.md
index 7bc543bb5..366b04627 100644
--- a/src/site/markdown/documentation.md
+++ b/src/site/markdown/documentation.md
@@ -1,6 +1,6 @@
 # Copilot SDK for Java - Documentation
 
-> ⚠️ **Disclaimer:** This is an **unofficial, community-driven SDK** and is **not supported or endorsed by GitHub**. Use at your own risk.
+> 🚨 **This repository is archived.** The official GitHub Copilot SDK for Java is now maintained at **[github/copilot-sdk-java](https://github.com/github/copilot-sdk-java)**. No further changes or releases will be made here. Please use the official SDK going forward.
 
 This guide covers common use cases for the Copilot SDK for Java. For complete API details, see the [Javadoc](apidocs/index.html).
 
diff --git a/src/site/markdown/hooks.md b/src/site/markdown/hooks.md
index 511721c33..4dde96fdd 100644
--- a/src/site/markdown/hooks.md
+++ b/src/site/markdown/hooks.md
@@ -1,6 +1,6 @@
 # Session Hooks
 
-> ⚠️ **Disclaimer:** This is an **unofficial, community-driven SDK** and is **not supported or endorsed by GitHub**. Use at your own risk.
+> 🚨 **This repository is archived.** The official GitHub Copilot SDK for Java is now maintained at **[github/copilot-sdk-java](https://github.com/github/copilot-sdk-java)**. No further changes or releases will be made here. Please use the official SDK going forward.
 
 Session hooks allow you to intercept and modify tool execution, user prompts, and session lifecycle events. Use hooks to implement custom logic like logging, security controls, or context injection.
 
diff --git a/src/site/markdown/index.md b/src/site/markdown/index.md
index ad8a3e143..83a589824 100644
--- a/src/site/markdown/index.md
+++ b/src/site/markdown/index.md
@@ -1,6 +1,6 @@
 # Copilot SDK for Java
 
-> ⚠️ **Disclaimer:** This is an **unofficial, community-driven SDK** and is **not supported or endorsed by GitHub**. Use at your own risk.
+> 🚨 **This repository is archived.** The official GitHub Copilot SDK for Java is now maintained at **[github/copilot-sdk-java](https://github.com/github/copilot-sdk-java)**. No further changes or releases will be made here. Please use the official SDK going forward.
 
 Welcome to the documentation for the **Copilot SDK for Java** — a Java SDK for programmatic control of GitHub Copilot CLI, enabling you to build AI-powered applications and agentic workflows.