diff --git a/README.md b/README.md
index 26451b0..7d8431c 100644
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+++ b/README.md
@@ -2,6 +2,9 @@
 
 A framework for testing MCP (Model Context Protocol) client implementations against the specification.
 
+> [!WARNING]
+> This repository is a work in progress and is unstable. Join the conversation in the #conformance-testing-wg in the MCP Contributors discord.
+
 ## Quick Start
 
 ```bash