Claude Code 2.1.224 is here, and this time the changelog hides a real heavyweight: self-hosted environments. The new claude self-hosted-runner command turns your own machines or containers into a place where Claude Code’s web, mobile, and desktop sessions can run. Available on Team and Enterprise plans.
Why this is a big step
Until now, cloud sessions — the tasks that keep working in the background after you close the laptop — ran on Anthropic’s infrastructure. Convenient, but a dealbreaker for a lot of companies: code and data leave the building. That’s exactly what the self-hosted runner addresses. You still drive the sessions comfortably from web and mobile, but the actual work happens on your hardware, inside your network, behind your firewall.
For teams with strict compliance requirements, that’s the difference between “not allowed” and “we can roll this out today.” You get the convenience of cloud sessions without handing over control of the environment.
Agents that talk to each other
The second big item: cross-session SendMessage. Claude Code sessions can now message each other — across any of your machines. ListAgents lets you discover which sessions are reachable in the first place (macOS and Linux). Messages sent to a session running with bypassed permissions are held for your approval; everything else is delivered directly.
Sounds minor, but it’s the foundation for real multi-agent work. One agent on the build server, one on your laptop, one in the cloud — and they coordinate. Fittingly, the old cap of 200 subagents per session is gone. Long-running sessions no longer refuse new agents.
The rest, quickly
There’s a new archive plugin source: you can now install plugins from a zip over HTTPS — no git, no npm, with optional SHA-256 pinning. Plus new sandbox credential-masking options, including JWT-aware masking and AWS SigV4 re-signing. And a whole batch of fixes around Remote Control and long project paths.
My take
Self-hosted runner is the headline feature for me — and one that gives away the target audience. Anthropic keeps sharpening Claude Code into a tool for large organizations, where data sovereignty isn’t a nice-to-have but a hard requirement. If you can run your cloud sessions on your own hardware, you no longer have to choose between autonomy and control.
And cross-session messaging hints at where this is going: away from the single agent dutifully working through one task, toward a network of agents collaborating across machines. It still feels a bit hand-rolled — but the building blocks are on the table now.
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