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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 v2.1.229

Self-hosted runner requires --base-dir on Windows

Use it now
Useful3 Signal3
Self-Hosted Runner Notable

Self-hosted runners on Windows now require you to set a base directory instead of failing oddly.

--base-dirSELF_HOSTED_RUNNER_BASE_DIRCLAUDE_RUNNER_CLIENT_PLATFORM
What

Starting a self-hosted runner on Windows without a base directory now fails with an explanatory error instead of silently falling back to a POSIX container path that does not exist there. Set --base-dir or the SELF_HOSTED_RUNNER_BASE_DIR environment variable to the directory repositories should be checked out under. The runner also now passes CLAUDE_RUNNER_CLIENT_PLATFORM into spawned runner environments, parsed as client_platform.

Details
  • Passing --base-dir records where the value came from.
Usage
claude ... --base-dir C:\runner\repos
Evidence

--base-dir (or SELF_HOSTED_RUNNER_BASE_DIR) is required on Windows: the built-in default is a POSIX container path that does not apply there. Pass the directory that repositories should be checked out under.

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 v2.1.229 →