diff --git a/design.md b/design.md
index efd4ef5..235e0e9 100644
--- a/design.md
+++ b/design.md
@@ -105,6 +105,7 @@ See `config.md` for complete configuration documentation.
 - **Safe shutdown mechanism** with async-signal-safe shutdown() method
 - **Connection ownership management** with automatic cleanup on server destruction
 - **Pluggable protocol handlers** via ConnectionHandler interface
+- TODO design a way to stream server sent events
 
 Key features:
 - Multi-threaded architecture: separate accept and network thread pools