diff --git a/changelog.md b/changelog.md
index d699793f..7e1b587f 100644
--- a/changelog.md
+++ b/changelog.md
@@ -24,6 +24,15 @@
 
 - **Client Citation Deserialization**: Fixed deserialization of citations containing `@id` values
 
+## Developer Experience
+
+- **`AgentApplication` Adapter Ownership Deprecation**: Deprecated the notion that an `AgentApplication` owns a single adapter. Applications no longer need to be initialized with an adapter; instead, operations such as conversation continuations and long-running calls use the adapter from the current `TurnContext`. This decouples `AgentApplication` from adapter initialization.
+- **Request ID Propagation**: Added `request_id` to `Activity` and `ConversationReference`, with automatic generation for incoming HTTP requests and propagation through conversation references and continuation activities for end-to-end request tracing (#591)
+
+## Breaking Changes
+
+- **Deprecated API Removal**: Removed the deprecated `BasicCard` and `MediaCard` types, `ClaimsIdentity.is_authenticated`, `AgentApplication.parse_env_vars_configuration`, and the `CardFactory.ContentTypes` alias (#603)
+
 ---
 
 # Microsoft 365 Agents SDK for Python - Release Notes v1.7.0