● Covered by 1 source · 1 reportLow impact1 neutral
Claude Code Sessions Now Support Cross-Session Messaging
Key points
- Claude sessions can now send messages to other independent sessions.
- Messaging facilitates sharing findings, coordinating parallel work, and status updates.
- Claude can initiate messages autonomously or be prompted by the user.
- Messages are delivered between tool calls, not interrupting active processes.
Cross-Session Communication Introduced
Claude Code has introduced a new capability allowing independent Claude sessions to communicate with each other. This feature enables one session to send messages to another, facilitating better coordination and information exchange across different instances of the AI assistant. Users can leverage this for various scenarios where information needs to be shared between ongoing tasks.
Use Cases for Inter-Session Messaging
The cross-session messaging is designed for situations where one Claude session needs to convey information to another mid-task. Common applications include handing over findings, such as a breaking change or a decision, to a session working on an affected area. It also supports coordinating parallel worktrees in the same repository by informing other sessions about landed changes. Additionally, users can get status updates from long-running tasks, like migrations or test runs, directly in a monitoring session.
How Messaging Works
Claude can decide to send a message autonomously when it identifies a need, such as after making a change relevant to another session. Users can also explicitly prompt Claude to send a message. The system uses `ListAgents` to discover reachable agents and `SendMessage` to deliver the message by name. Messages are read by the receiving Claude session between tool calls during an active turn, ensuring that running tools are not interrupted. If the receiving session is idle, Claude Code initiates a new turn to process the message.
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Reporting from
Claude Code now allows independent sessions to message each other, enabling coordination and information sharing between different instances of the AI assistant. This feature helps users manage parallel tasks, share findings, and get status updates across multiple Claude Code environments.