version bump and release notes

changelog.md

@@ -1,16 +1,33 @@
-# Microsoft 365 Agents SDK for Python  -  Release Notes v1.5.0 (Unreleased)
+# Microsoft 365 Agents SDK for Python - Release Notes v1.5.0
 
-**Release Date:** Unreleased
+**Release Date:** 2026-08-26
 **Previous Version:** 1.4.0 (Released 2026-08-18)
 
 ## Major Features & Enhancements
 
-- **Testing Package**: Added the new `microsoft-agents-testing` package with an in-memory `TestAdapter`, fluent `TestFlow` conversation assertions, and `MockUserTokenClient` support for testing OAuth and token-exchange flows without external services.
+- **Testing Package**: Added the new `microsoft-agents-testing` package with an in-memory `TestAdapter`, fluent `TestFlow` conversation assertions, and `MockUserTokenClient` support for testing OAuth and token-exchange flows without external services (#503)
+- **Outbound Host Validation**: Added the shared `OutboundHostValidator` with configurable host-suffix allowlists and default Microsoft service hosts, and integrated it with the aiohttp and FastAPI adapters to help prevent SSRF attacks (#543)
+- **Proactive Trace Linking**: Added OpenTelemetry span links that preserve trace correlation across stored proactive conversations and later continue, create-conversation, and send-activity operations (#534)
+
+## New Models & APIs
+
+- **`StreamInfo` Compatibility**: Added serialization and deserialization behavior compatible with the .NET SDK for reliable cross-SDK streaming round trips (#561)
+
+## Bug Fixes
+
+- **Streaming Reliability**: Improved streaming timeout handling and keep-alive behavior to prevent premature timeout failures (#560)
+- **Expect Replies Handling**: Moved expect-replies response handling into the adapter layer, fixing typing-indicator behavior and response aggregation (#556)
 
 ## Developer Experience
 
-- **Authentication Configuration Validation**: Added validation for certificate, federated credential, and workload identity authentication settings
-- **Configuration Loading**: Expanded `load_configuration_from_env` to accept any mapping type
+- **Authentication Configuration Validation**: Added validation for certificate, federated credential, and workload identity authentication settings (#551)
+- **Configuration Loading**: Expanded `load_configuration_from_env` to accept any mapping type (#552)
+- **Zero-Code OpenTelemetry Sample**: Added a sample that uses the OpenTelemetry Python distro, environment-based auto-instrumentation, OTLP export to the Aspire Dashboard, and a custom sampler that drops typing-indicator spans without configuring telemetry in application code (#503)
+- **GitHub Actions Security**: Pinned GitHub Actions to full-length commit SHAs and updated action dependencies (#546, #548, #553)
+
+## Documentation
+
+- **Release Notes Formatting**: Standardized release-note heading formatting (#557)
 
 ---
 

libraries/microsoft-agents-activity/readme.md

@@ -15,6 +15,15 @@ This library is part of the **Microsoft 365 Agents SDK for Python** - a comprehe
     <th style="width:20%">Date</th>
     <th style="width:60%">Release Notes</th>
   </tr>
+  <tr>
+    <td>1.5.0</td>
+    <td>2026-08-26</td>
+    <td>
+      <a href="https://github.com/microsoft/Agents-for-python/blob/main/changelog.md#microsoft-365-agents-sdk-for-python---release-notes-v150">
+        1.5.0 Release Notes
+      </a>
+    </td>
+  </tr>
   <tr>
    <td>1.4.0</td>
    <td>2026-08-18</td>

libraries/microsoft-agents-authentication-entra-auth-sidecar/readme.md

@@ -15,6 +15,15 @@ handles secrets, certificates, or keys.
     <th style="width:20%">Date</th>
     <th style="width:60%">Release Notes</th>
   </tr>
+  <tr>
+    <td>1.5.0</td>
+    <td>2026-08-26</td>
+    <td>
+      <a href="https://github.com/microsoft/Agents-for-python/blob/main/changelog.md#microsoft-365-agents-sdk-for-python---release-notes-v150">
+        1.5.0 Release Notes
+      </a>
+    </td>
+  </tr>
   <tr>
    <td>1.4.0</td>
    <td>2026-08-18</td>

libraries/microsoft-agents-authentication-msal/readme.md

@@ -15,6 +15,15 @@ This library is part of the **Microsoft 365 Agents SDK for Python** - a comprehe
     <th style="width:20%">Date</th>
     <th style="width:60%">Release Notes</th>
   </tr>
+  <tr>
+    <td>1.5.0</td>
+    <td>2026-08-26</td>
+    <td>
+      <a href="https://github.com/microsoft/Agents-for-python/blob/main/changelog.md#microsoft-365-agents-sdk-for-python---release-notes-v150">
+        1.5.0 Release Notes
+      </a>
+    </td>
+  </tr>
   <tr>
    <td>1.4.0</td>
    <td>2026-08-18</td>

libraries/microsoft-agents-copilotstudio-client/readme.md

@@ -16,6 +16,15 @@ This library is part of the **Microsoft 365 Agents SDK for Python** - a comprehe
     <th style="width:20%">Date</th>
     <th style="width:60%">Release Notes</th>
   </tr>
+  <tr>
+    <td>1.5.0</td>
+    <td>2026-08-26</td>
+    <td>
+      <a href="https://github.com/microsoft/Agents-for-python/blob/main/changelog.md#microsoft-365-agents-sdk-for-python---release-notes-v150">
+        1.5.0 Release Notes
+      </a>
+    </td>
+  </tr>
   <tr>
    <td>1.4.0</td>
    <td>2026-08-18</td>

libraries/microsoft-agents-hosting-aiohttp/readme.md

@@ -17,6 +17,15 @@ This library is part of the **Microsoft 365 Agents SDK for Python** - a comprehe
     <th style="width:20%">Date</th>
     <th style="width:60%">Release Notes</th>
   </tr>
+  <tr>
+    <td>1.5.0</td>
+    <td>2026-08-26</td>
+    <td>
+      <a href="https://github.com/microsoft/Agents-for-python/blob/main/changelog.md#microsoft-365-agents-sdk-for-python---release-notes-v150">
+        1.5.0 Release Notes
+      </a>
+    </td>
+  </tr>
   <tr>
    <td>1.4.0</td>
    <td>2026-08-18</td>

libraries/microsoft-agents-hosting-core/readme.md

@@ -16,6 +16,15 @@ This library is part of the **Microsoft 365 Agents SDK for Python** - a comprehe
     <th style="width:20%">Date</th>
     <th style="width:60%">Release Notes</th>
   </tr>
+  <tr>
+    <td>1.5.0</td>
+    <td>2026-08-26</td>
+    <td>
+      <a href="https://github.com/microsoft/Agents-for-python/blob/main/changelog.md#microsoft-365-agents-sdk-for-python---release-notes-v150">
+        1.5.0 Release Notes
+      </a>
+    </td>
+  </tr>
   <tr>
    <td>1.4.0</td>
    <td>2026-08-18</td>

libraries/microsoft-agents-hosting-dialogs/readme.md

@@ -18,6 +18,15 @@ This library is part of the **Microsoft 365 Agents SDK for Python** - a comprehe
     <th style="width:20%">Date</th>
     <th style="width:60%">Release Notes</th>
   </tr>
+  <tr>
+    <td>1.5.0</td>
+    <td>2026-08-26</td>
+    <td>
+      <a href="https://github.com/microsoft/Agents-for-python/blob/main/changelog.md#microsoft-365-agents-sdk-for-python---release-notes-v150">
+        1.5.0 Release Notes
+      </a>
+    </td>
+  </tr>
   <tr>
     <td>1.4.0</td>
     <td>2026-08-18</td>

libraries/microsoft-agents-hosting-fastapi/readme.md

@@ -9,6 +9,15 @@ This library provides FastAPI integration for Microsoft Agents, enabling you to
     <th style="width:20%">Date</th>
     <th style="width:60%">Release Notes</th>
   </tr>
+  <tr>
+    <td>1.5.0</td>
+    <td>2026-08-26</td>
+    <td>
+      <a href="https://github.com/microsoft/Agents-for-python/blob/main/changelog.md#microsoft-365-agents-sdk-for-python---release-notes-v150">
+        1.5.0 Release Notes
+      </a>
+    </td>
+  </tr>
   <tr>
    <td>1.4.0</td>
    <td>2026-08-18</td>

libraries/microsoft-agents-hosting-msteams/readme.md

@@ -18,6 +18,15 @@ This library is part of the **Microsoft 365 Agents SDK for Python** — a compre
     <th style="width:20%">Date</th>
     <th style="width:60%">Release Notes</th>
   </tr>
+  <tr>
+    <td>1.5.0</td>
+    <td>2026-08-26</td>
+    <td>
+      <a href="https://github.com/microsoft/Agents-for-python/blob/main/changelog.md#microsoft-365-agents-sdk-for-python---release-notes-v150">
+        1.5.0 Release Notes
+      </a>
+    </td>
+  </tr>
   <tr>
    <td>1.4.0</td>
    <td>2026-08-18</td>

libraries/microsoft-agents-hosting-slack/readme.md

@@ -13,6 +13,15 @@ Integration library for building Slack agents using the Microsoft 365 Agents SDK
     <th style="width:20%">Date</th>
     <th style="width:60%">Release Notes</th>
   </tr>
+  <tr>
+    <td>1.5.0</td>
+    <td>2026-08-26</td>
+    <td>
+      <a href="https://github.com/microsoft/Agents-for-python/blob/main/changelog.md#microsoft-365-agents-sdk-for-python---release-notes-v150">
+        1.5.0 Release Notes
+      </a>
+    </td>
+  </tr>
   <tr>
    <td>1.4.0</td>
    <td>2026-08-18</td>

libraries/microsoft-agents-hosting-teams/readme.md

@@ -18,6 +18,15 @@ This library is part of the **Microsoft 365 Agents SDK for Python** - a comprehe
     <th style="width:20%">Date</th>
     <th style="width:60%">Release Notes</th>
   </tr>
+  <tr>
+    <td>1.5.0</td>
+    <td>2026-08-26</td>
+    <td>
+      <a href="https://github.com/microsoft/Agents-for-python/blob/main/changelog.md#microsoft-365-agents-sdk-for-python---release-notes-v150">
+        1.5.0 Release Notes
+      </a>
+    </td>
+  </tr>
   <tr>
    <td>1.4.0</td>
    <td>2026-08-18</td>

libraries/microsoft-agents-storage-blob/readme.md

@@ -16,6 +16,15 @@ This library is part of the **Microsoft 365 Agents SDK for Python** - a comprehe
     <th style="width:20%">Date</th>
     <th style="width:60%">Release Notes</th>
   </tr>
+  <tr>
+    <td>1.5.0</td>
+    <td>2026-08-26</td>
+    <td>
+      <a href="https://github.com/microsoft/Agents-for-python/blob/main/changelog.md#microsoft-365-agents-sdk-for-python---release-notes-v150">
+        1.5.0 Release Notes
+      </a>
+    </td>
+  </tr>
   <tr>
    <td>1.4.0</td>
    <td>2026-08-18</td>

libraries/microsoft-agents-storage-cosmos/readme.md

@@ -16,6 +16,15 @@ This library is part of the **Microsoft 365 Agents SDK for Python** - a comprehe
     <th style="width:20%">Date</th>
     <th style="width:60%">Release Notes</th>
   </tr>
+  <tr>
+    <td>1.5.0</td>
+    <td>2026-08-26</td>
+    <td>
+      <a href="https://github.com/microsoft/Agents-for-python/blob/main/changelog.md#microsoft-365-agents-sdk-for-python---release-notes-v150">
+        1.5.0 Release Notes
+      </a>
+    </td>
+  </tr>
   <tr>
    <td>1.4.0</td>
    <td>2026-08-18</td>

libraries/microsoft-agents-testing/readme.md

@@ -7,6 +7,25 @@ provides an in-memory channel adapter, fluent conversation assertions, and a
 mock user-token client so agent behavior can be tested without a live channel
 or token service.
 
+## Release Notes
+
+<table style="width:100%">
+  <tr>
+    <th style="width:20%">Version</th>
+    <th style="width:20%">Date</th>
+    <th style="width:60%">Release Notes</th>
+  </tr>
+  <tr>
+    <td>1.5.0</td>
+    <td>2026-08-26</td>
+    <td>
+      <a href="https://github.com/microsoft/Agents-for-python/blob/main/changelog.md#microsoft-365-agents-sdk-for-python---release-notes-v150">
+        1.5.0 Release Notes
+      </a>
+    </td>
+  </tr>
+</table>
+
 ## Features
 
 - **`TestAdapter`** runs activities through the normal middleware and agent

versioning/TARGET-VERSION

@@ -1 +1 @@
-1.5.0.
+1.6.0.