Add missing list_sessions() method to Python SDK client

[Copilot]

Implementation Plan for delete_session Method

• Implement delete_session() method in client.py
• Add e2e test for delete_session() method
• Run linter and tests to validate the implementation
• Run security checks (no vulnerabilities found)
• Improve exception handling based on code review feedback

Original prompt

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This section details on the original issue you should resolve

<issue_title>Python SDK client class don't have list_sessions() method</issue_title>
<issue_description>In python cookbook muilti_seesion manage section,The example show CopilotClient class has list_sessions method.
But in source code,it is not existed. Is this an issue?Or this method should be implemented by user?</issue_description>

<agent_instructions>Add the missing list_sessions method to the Python SDK client. You can look at how it's implemented in the nodejs SDK client for reference.</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Python SDK client class don't have list_sessions() method #130

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[github-actions]

✅ Cross-SDK Consistency Review

Thank you for adding the missing list_sessions() and delete_session() methods to the Python SDK! This brings Python into parity with Node.js and .NET implementations.

Current Implementation Status

SDK	list_sessions	delete_session	SessionMetadata type
Node.js	✅ listSessions()	✅ deleteSession()	✅
Python	✅ list_sessions() (this PR)	✅ delete_session() (this PR)	✅ (this PR)
.NET	✅ ListSessionsAsync()	✅ DeleteSessionAsync()	✅
Go	❌ Missing	❌ Missing	❌ Missing

🔍 Consistency Gap Identified

The Go SDK is missing both methods and the SessionMetadata type. To maintain feature parity across all SDK implementations, the Go SDK should be updated to include:

1. ListSessions() method - Should return []SessionMetadata and call the session.list RPC method
2. DeleteSession(sessionID string) method - Should call the session.delete RPC method
3. SessionMetadata struct - Should include fields: SessionID, StartTime, ModifiedTime, Summary (optional), and IsRemote

📋 Recommendation

Consider opening a follow-up issue or PR to add these methods to the Go SDK (go/client.go and go/types.go) to ensure all four SDK implementations offer consistent functionality for session management.

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Note: The Python implementation in this PR looks solid and follows the same patterns as Node.js and .NET. The API design is consistent with language conventions (snake_case for Python vs camelCase for Node.js vs PascalCase for .NET).

AI generated by SDK Consistency Review Agent

[Copilot]

Pull request overview

This PR adds the missing list_sessions() method to the Python SDK client, along with a delete_session() method for session management. The original issue #130 reported that the Python SDK was missing the list_sessions() method that was documented in the cookbook examples.

Changes:

• Added list_sessions() method to retrieve all available sessions from the server
• Added delete_session() method to permanently remove sessions
• Added SessionMetadata TypedDict for session metadata structure
• Added comprehensive E2E tests for both new methods

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
python/copilot/client.py	Implements list_sessions() and delete_session() methods with proper error handling and thread-safe session map cleanup
python/copilot/types.py	Adds SessionMetadata TypedDict to define the structure of session metadata returned by the server
python/copilot/init.py	Exports the new SessionMetadata type for public API usage
python/e2e/test_session.py	Adds two E2E tests validating list_sessions() returns proper metadata and delete_session() properly removes sessions

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