Update claude-api skill: Claude Sonnet 5 and Managed Agents July updates (#1373)

skills/claude-api/python/claude-api/README.md

@@ -498,7 +498,7 @@ response = client.messages.create(
 
 # Use Sonnet for high-volume production workloads
 standard_response = client.messages.create(
-    model="claude-sonnet-4-6",  # $3.00/$15.00 per 1M tokens
+    model="claude-sonnet-5",  # $3.00/$15.00 per 1M tokens
     max_tokens=16000,
     messages=[{"role": "user", "content": "Summarize this document"}]
 )

skills/claude-api/python/managed-agents/README.md

@@ -61,6 +61,7 @@ session = client.beta.sessions.create(
     environment_id=environment.id,
 )
 print(session.id, session.status)
+print(f"Trace: https://platform.claude.com/workspaces/default/sessions/{session.id}")
 ```
 
 ### With system prompt and custom tools