Anthropic adds cross-session messaging to Claude Code v2.1.224 on macOS and Linux
Anthropic has released Claude Code v2.1.224 with cross-session messaging for macOS and Linux, enabling different terminal sessions to send messages, share findings, and coordinate work. The feature supports submitting analysis conclusions, coordinating parallel work trees, checking long-running task status, and enabling cross-machine communication. Users need only provide core communication intent; the system generates complete text messages automatically. Strict security limits prevent approving permission requests or changing global configuration, and commands like /compact are transmitted as plain text without execution. Any action requiring execution still demands user approval.
AI startup Anthropic has officially launched a cross-session messaging feature for its AI coding tool, Claude Code, in 2026. Integrated into version v2.1.224, the feature is available on macOS and Linux platforms, allowing different terminal sessions to send messages to each other, share discoveries, answer questions, and coordinate work.
Typical use cases include submitting analysis conclusions, coordinating parallel work trees, obtaining the latest status of long-running tasks, and enabling responsive communication across machines. On the operational level, users do not need to design specific message structures; they only need to provide the core communication intent, and the system will automatically generate complete text messages. This design aims to simplify the complexity of multi-task collaboration, allowing technical staff to run multiple Claude Code instances simultaneously to handle different modules of the same project.
The cross-session messaging feature imposes strict security restrictions in permission management. It cannot be used to approve permission requests or change global configuration; commands such as /compact are transmitted in plain text and cannot be executed directly. If a receiving session needs to execute specific actions based on message content, the system will still proactively request user approval.
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