Claude Code adds cross-session communication macOS and Linux users can send messages to each other

Anthropic announced the launch of the Claude Code cross-session messaging feature on August 7, 2026. Users running the latest version of Claude Code on macOS and Linux can send messages between different work stages to share results, ask questions and coordinate work. This feature is available since Claude Code v2.1.224. Transferring messages across work sessions The new feature allows Claude to transfer messages from one Claude Code session to another work session, including updates and other related information. When a change in one stage destroys content that another stage is relying on, Claude will issue a warning to that stage before the user notices it; when a stage solves a problem that is blocking another stage, Claude will also send the answer there. Users do not need to organize the message content themselves. They only need to write what they want to convey in the prompt, and Claude will write the actual message on their behalf. The official recommended usage scenario Anthropic states that this feature is best used for handing over investigation results, coordinating parallel worktrees, obtaining the status of long-running jobs, and replying across machines. This feature is especially useful for users who are running multiple Claude Code sessions simultaneously and collaborating on different parts of the same project. The user can directly instruct Claude to send a summary without having to re-specify it in another session; the summary will not contain the full history or archives and will be received by another session while the task is in progress. Permissions and Directive Limitations Cross-session messages are not available for approving permission requests or changing configurations. Commands such as /compact are delivered as plain text and are not executed as actual commands; if the recipient requires permission to process the message content, the receive phase will still require user approval. For details, please refer to the official documentation of Anthropic.