Claude Code on macOS and Linux can now send messages between sessions on the same machine or across computers to share context and coordinate work.
On a single machine, communication happens locally; between different computers, messages route through Anthropic's servers and only allow responses, not full two-way conversation.
The feature is unavailable on Amazon Bedrock, Google Cloud Agent Platform, or Microsoft Foundry.
What happened
Claude Code on macOS and Linux can now send messages between sessions on the same machine (locally) or across different computers (routed through Anthropic's servers). Sessions can share text summaries, ask questions and receive answers, or Claude can initiate messages when a change affects another session's work.
Why it matters
Developers working across multiple terminals no longer need to manually copy information between Claude Code sessions. The feature supports parallel workflows and status monitoring of long-running tasks, reducing friction in multi-session development work.
What to watch
The feature is not available on Amazon Bedrock, Google Cloud Agent Platform, or Microsoft Foundry. Admins can restrict inter-session messaging via settings; only responses (not two-way conversation) are possible when communicating across different computers.
Ask the AI about this article →
Anthropic has introduced inter-session messaging to Claude Code as a workflow optimization for developers juggling multiple parallel tasks. The distinction between local and remote communication—where same-machine messaging happens directly and cross-computer messaging routes through Anthropic's servers with response-only limitations—reflects practical constraints around latency and architectural design. The feature addresses documented use cases: sharing insights between sessions, coordinating parallel workflows, and monitoring long-running tasks without manual context copying. The restriction to macOS and Linux (excluding cloud platforms like Amazon Bedrock and Google Cloud Agent Platform) suggests the feature is currently tied to the desktop implementation of Claude Code, though the body does not detail the technical reason for this limitation.
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