Allow cross-thread communication between agents

What variant of Codex are you using?

IDE Extension and CLI

What feature would you like to see?

Allow agents running in different threads to communicate with each other.

This would enable an agent in one thread to send messages, requests, or relevant context to an agent in another thread, making it possible to coordinate work across independent conversations or tasks.

Ideally, agents should be able to:

• Identify or address another active agent/thread.
• Send messages or structured data across threads.
• Receive responses without merging the threads or their full contexts.
• Maintain clear attribution of which agent/thread sent each message.

This would be useful for multi-agent workflows where separate agents handle different parts of a task but still need to coordinate.

Additional information

_No response_