Anthropic has made it easier to manage multiple Claude Code sessions by allowing separate terminal sessions to send messages directly to one another.
The feature arrived with Claude Code version 2.1.224, released on Friday for macOS and Linux. It removes the need for developers to manually copy information between different Terminal windows when one coding session needs to update another.
The update adds two new tools, called ListAgents and SendMessage. ListAgents can find other active Claude Code sessions running on the same Mac, while SendMessage lets one session send text to another.
When a session receives a message, it appears as a labelled card containing a link to the session that sent it. This could be useful when developers are running several Claude Code sessions at once and need them to stay aware of each other’s work.
For example, one session could tell another that a recent code change has broken something it relies on. A session could also send an answer to another session that is waiting for information, reducing the need for the developer to step in and move the context manually.
There are limits to what is shared, however. Anthropic’s documentation says the feature only sends text between sessions. Conversation history, files and permissions are not transferred.
Messages also cannot take control of another session. An incoming message cannot approve a permission request or change the settings of the session receiving it.
The feature is separate from Claude Code’s existing subagents and Agent Teams capabilities. Those tools allow Claude to create and manage additional agents, while the new system is designed to connect sessions that the developer has already started separately.
There is also a privacy benefit for developers running multiple sessions on the same machine. Messages sent between Claude Code sessions on a Mac remain local and do not pass through Anthropic’s servers.
Cross-device messaging works differently. It is available through Remote Control, which connects a Claude Code session on a Mac with Claude’s iOS and Android apps.
The new cross-session messaging feature requires Claude Code 2.1.224 or later on macOS or Linux and is not available on Windows.
The release included 31 other changes, including a new claude self-hosted-runner command for Team and Enterprise customers.
Overall, the update gives developers a simpler way to coordinate multiple Claude Code sessions without constantly switching between terminals or manually moving information from one session to another.
Anthropic has added cross-session messaging to Claude Code, letting separate coding sessions exchange text without manually copying context between terminals.
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