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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.224

Local runner spawn writes into ./runner-setup and checks 127.0.0.1:8080

You'll notice
Useful2 Signal3
Self-Hosted Runner

The setup wizard spawns a detached runner into ./runner-setup and warns it outlives your session.

--api-url--base-dir--environment--environment-secret-file--health-port
What

The setup wizard's spawn tool starts a detached self-hosted runner process, defaulting its working directory to ./runner-setup/workspace, its log to ./runner-setup/runner.log and its pid file to ./runner-setup/runner.pid. Companion tools read http://127.0.0.1:<port>/healthz and /metrics on port 8080 by default (0 disables the listener). The permission prompt warns that the runner will keep running after this session ends.

Details
  • The spawn passes --environment-secret-file, --capacity, --base-dir, --api-url, --health-port and --log-file.
  • The metrics tool reads only gauges prefixed claude_code_self_hosted_runner_, skipping histogram buckets, per-session idle seconds and poll error totals.
  • Tail-log reads the trailing bytes of the log and redacts secrets before showing them.
  • These tools are only available inside the setup and doctor wizards.
Evidence

claude_code_self_hosted_runner_

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.224 →