Claude Code lets your independent sessions message each other to share findings, coordinate work, and report status without you manually copying information between terminals. Messages are delivered between tool calls and filtered through permission controls that prevent sessions from approving actions or changing configuration on each other's behalf. You can prompt Claude to send a message, or it'll detect when another session needs information and send it automatically.

• Claude Code sessions (v2.1.224+, macOS/Linux) can now message each other automatically or on request, using ListAgents/SendMessage tools, without interrupting running processes.
• Cross-machine messaging is one-way by default—remote or web sessions can only reply to existing threads, not initiate them, and replies from sessions without Remote Control arrive without a return address.
• Incoming messages are treated as system info, not user commands, so they can't approve permissions, change config, or run commands—permission prompts still trigger as normal.
• Inbound behavior is configurable per session via crossSessionInbound, with automatic naming (e.g. "myapp-3f") and /list-agents to see reachable sessions.

Claude Code now generates live, interactive web pages—artifacts—from your session context, codebase, and connected tools. These auto-updating, versioned pages share via a single link for incident reports, PR walkthroughs, dashboards, and more, with org-level access controls and no extra infrastructure.

• Claude Code can now turn a session's context (code, logs, tool connections) into a live, shareable web page instead of a static chat answer.
• Artifacts auto-update and version at the same URL, so an incident report or dashboard stays current without re-sharing links.
• Access is locked to org accounts with role-based permissions, retention policies, and compliance API access—nothing public by default.
• Rolling out in beta to Claude Team/Enterprise via CLI or desktop app, with prebuilt use cases spanning legal, security, FinOps, design, and PM workflows.

Anthropic is revamping its Claude Code desktop app under the “Epitaxy” codename, adding multi-panel views for Plans, Tasks, Diffs and support for multiple repositories. It also introduces a Coordinator Mode that lets Claude orchestrate parallel sub-agents and create custom agents in-app, mirroring OpenAI’s Codex agent workflow but running locally on the desktop.

• Anthropic's "Epitaxy" update overhauls Claude Code's desktop app with side-by-side Plans, Tasks, and Diffs panels, plus multi-repo support and in-app code preview.
• A new Coordinator Mode brings sub-agent orchestration (previously CLI-only) into the desktop UI, letting Claude delegate work across parallel sub-agents.
• This directly mirrors OpenAI's Codex "Magic TODO" parallel-agent workflow, but runs locally instead of in the cloud.
• Both companies are racing to ship these desktop updates as soon as next week, signaling a shift in competitive focus from model performance to workflow integration.