Claude Code v2.1.224 lets your coding sessions message each other, so running several terminals at once no longer means copy-pasting context between them. Anthropic announced the feature on Friday; it works on macOS and Linux and is on by default.
What Claude Code cross-session messaging does
You tell Claude what another session should know, and Claude writes the message. The receiving session picks it up between tool calls — mid-task, without waiting for you. What travels is a summary, never your conversation history or files.
From Anthropic’s documentation:
Cross-session messaging lets Claude deliver a message from one of your Claude Code sessions to another. When a change in one session breaks what another is building on, Claude can warn that session before you notice. When one session settles a question another is blocked on, Claude can send the answer across.
Anthropic’s announcement on X:
The stated use cases: handing over a finding, coordinating parallel worktrees, checking on long-running migrations or test runs, and replying from another machine. The prompt can be as vague as “ask the session running in my other terminal whether the migration finished” — the wording is Claude’s problem.
The limits
Cross-session messages cannot approve permission requests or change configuration. A command such as /compact arrives as plain text, not a command, and anything an incoming message asks for still runs through the receiving session’s permission prompts.
Same-machine messages travel over a local socket, never through Anthropic’s servers. Between machines, messaging is reply-only, routed through the Remote Control connection.
What it means for developers in the UAE
The feature arrives with no regional gate, so UAE developers get it on the same version and the same plans as everyone else — including the recent pricing shuffle that briefly tested pushing Claude Code onto $100-plus tiers. Anthropic has been courting the region’s smaller outfits with its Claude for Small Business bundle, and this is the kind of tooling that makes running parallel sessions practical for teams too small to re-explain context twice.
It is a step up from the desktop redesign’s session sidebar, which simply kept multiple sessions visible; now they can actually talk to each other. Anyone running more than one Claude Code session at a time will feel the difference almost immediately.
How do I enable cross-session messaging in Claude Code?
Update to Claude Code v2.1.224 or later on macOS or Linux. The feature is on by default, so there is nothing to enable. Run /list-agents to see which sessions Claude can reach.
Does cross-session messaging share my conversation history or files?
No. Only a text summary travels between sessions. To move a whole conversation or its context, resume the session instead.
Can Claude Code sessions on different machines message each other?
Only as replies. Sessions on the same machine message each other over a local socket. Across machines, messages route through Anthropic’s servers via Remote Control, and a session can answer a message but not start the exchange.
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