diff --git a/cookbook/copilot-sdk/python/accessibility-report.md b/cookbook/copilot-sdk/python/accessibility-report.md
index 3d67a5fa..ad22c671 100644
--- a/cookbook/copilot-sdk/python/accessibility-report.md
+++ b/cookbook/copilot-sdk/python/accessibility-report.md
@@ -36,7 +36,7 @@ python accessibility_report.py
 import asyncio
 from copilot import (
     CopilotClient, SessionConfig, MessageOptions,
-    SessionEvent, SessionEventType,
+    SessionEvent,
 )
 
 # ============================================================================
@@ -80,7 +80,7 @@ async def main():
 
     # Set up streaming event handling
     def handle_event(event: SessionEvent):
-        if event.type == SessionEventType.ASSISTANT_MESSAGE_DELTA:
+        if event.type.value == "assistant.message_delta":
             print(event.data.delta_content or "", end="", flush=True)
         elif event.type.value == "session.idle":
             done.set()
@@ -198,7 +198,7 @@ Unlike `send_and_wait`, this recipe uses streaming for real-time output:
 
 ```python
 def handle_event(event: SessionEvent):
-    if event.type == SessionEventType.ASSISTANT_MESSAGE_DELTA:
+    if event.type.value == "assistant.message_delta":
         print(event.data.delta_content or "", end="", flush=True)
     elif event.type.value == "session.idle":
         done.set()
diff --git a/cookbook/copilot-sdk/python/managing-local-files.md b/cookbook/copilot-sdk/python/managing-local-files.md
index a9e4e35f..f1e78b02 100644
--- a/cookbook/copilot-sdk/python/managing-local-files.md
+++ b/cookbook/copilot-sdk/python/managing-local-files.md
@@ -20,7 +20,7 @@ import asyncio
 import os
 from copilot import (
     CopilotClient, SessionConfig, MessageOptions,
-    SessionEvent, SessionEventType,
+    SessionEvent,
 )
 
 async def main():
@@ -35,11 +35,11 @@ async def main():
 
     # Event handler
     def handle_event(event: SessionEvent):
-        if event.type == SessionEventType.ASSISTANT_MESSAGE:
+        if event.type.value == "assistant.message":
             print(f"\nCopilot: {event.data.content}")
-        elif event.type == SessionEventType.TOOL_EXECUTION_START:
+        elif event.type.value == "tool.execution_start":
             print(f"  → Running: {event.data.tool_name}")
-        elif event.type == SessionEventType.TOOL_EXECUTION_COMPLETE:
+        elif event.type.value == "tool.execution_complete":
             print(f"  ✓ Completed: {event.data.tool_call_id}")
         elif event.type.value == "session.idle":
             done.set()
diff --git a/cookbook/copilot-sdk/python/pr-visualization.md b/cookbook/copilot-sdk/python/pr-visualization.md
index 0b158e4a..2e3d108b 100644
--- a/cookbook/copilot-sdk/python/pr-visualization.md
+++ b/cookbook/copilot-sdk/python/pr-visualization.md
@@ -45,7 +45,7 @@ import os
 import re
 from copilot import (
     CopilotClient, SessionConfig, MessageOptions,
-    SessionEvent, SessionEventType,
+    SessionEvent,
 )
 
 # ============================================================================
@@ -157,9 +157,9 @@ The current working directory is: {os.getcwd()}
 
     # Set up event handling
     def handle_event(event: SessionEvent):
-        if event.type == SessionEventType.ASSISTANT_MESSAGE:
+        if event.type.value == "assistant.message":
             print(f"\n🤖 {event.data.content}\n")
-        elif event.type == SessionEventType.TOOL_EXECUTION_START:
+        elif event.type.value == "tool.execution_start":
             print(f"  ⚙️  {event.data.tool_name}")
         elif event.type.value == "session.idle":
             done.set()
diff --git a/cookbook/copilot-sdk/python/recipe/accessibility_report.py b/cookbook/copilot-sdk/python/recipe/accessibility_report.py
index c5e0b6c9..69ca6468 100644
--- a/cookbook/copilot-sdk/python/recipe/accessibility_report.py
+++ b/cookbook/copilot-sdk/python/recipe/accessibility_report.py
@@ -3,7 +3,7 @@
 import asyncio
 from copilot import (
     CopilotClient, SessionConfig, MessageOptions,
-    SessionEvent, SessionEventType,
+    SessionEvent,
 )
 
 # ============================================================================
@@ -47,7 +47,7 @@ async def main():
 
     # Set up streaming event handling
     def handle_event(event: SessionEvent):
-        if event.type == SessionEventType.ASSISTANT_MESSAGE_DELTA:
+        if event.type.value == "assistant.message_delta":
             print(event.data.delta_content or "", end="", flush=True)
         elif event.type.value == "session.idle":
             done.set()
diff --git a/cookbook/copilot-sdk/python/recipe/managing_local_files.py b/cookbook/copilot-sdk/python/recipe/managing_local_files.py
index c0381170..f57bafcb 100644
--- a/cookbook/copilot-sdk/python/recipe/managing_local_files.py
+++ b/cookbook/copilot-sdk/python/recipe/managing_local_files.py
@@ -4,7 +4,7 @@ import asyncio
 import os
 from copilot import (
     CopilotClient, SessionConfig, MessageOptions,
-    SessionEvent, SessionEventType,
+    SessionEvent,
 )
 
 async def main():
@@ -19,11 +19,11 @@ async def main():
 
     # Event handler
     def handle_event(event: SessionEvent):
-        if event.type == SessionEventType.ASSISTANT_MESSAGE:
+        if event.type.value == "assistant.message":
             print(f"\nCopilot: {event.data.content}")
-        elif event.type == SessionEventType.TOOL_EXECUTION_START:
+        elif event.type.value == "tool.execution_start":
             print(f"  → Running: {event.data.tool_name}")
-        elif event.type == SessionEventType.TOOL_EXECUTION_COMPLETE:
+        elif event.type.value == "tool.execution_complete":
             print(f"  ✓ Completed: {event.data.tool_call_id}")
         elif event.type.value == "session.idle":
             done.set()
diff --git a/cookbook/copilot-sdk/python/recipe/pr_visualization.py b/cookbook/copilot-sdk/python/recipe/pr_visualization.py
index 9ece3f93..ace1a8a1 100644
--- a/cookbook/copilot-sdk/python/recipe/pr_visualization.py
+++ b/cookbook/copilot-sdk/python/recipe/pr_visualization.py
@@ -7,7 +7,7 @@ import os
 import re
 from copilot import (
     CopilotClient, SessionConfig, MessageOptions,
-    SessionEvent, SessionEventType,
+    SessionEvent,
 )
 
 # ============================================================================
@@ -119,9 +119,9 @@ The current working directory is: {os.getcwd()}
 
     # Set up event handling
     def handle_event(event: SessionEvent):
-        if event.type == SessionEventType.ASSISTANT_MESSAGE:
+        if event.type.value == "assistant.message":
             print(f"\n🤖 {event.data.content}\n")
-        elif event.type == SessionEventType.TOOL_EXECUTION_START:
+        elif event.type.value == "tool.execution_start":
             print(f"  ⚙️  {event.data.tool_name}")
         elif event.type.value == "session.idle":
             done.set()