Customize sessions in self-hosted environments changedself-hosted-environments-configuration
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Upstream edited this page at 9 Nov 2026 21:00 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 9 Nov 2026 21:07 UTC.
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#### Checkout folder names
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150150| :- | :- |
151151| `CLAUDE_RUNNER_REPO_URL` | Repository URL to clone, after any `--git-host-rewrite` and `--git-ssh-rewrite` have been applied |
152152| `CLAUDE_RUNNER_REPO_REF` | Revision to check out, as the session requested it: a branch, tag, commit SHA, or full reference name such as `refs/heads/<branch>` or `refs/pull/<number>/head`. Empty means the repository's default branch. |
153| `CLAUDE_RUNNER_CHECKOUT_PATH` | Absolute path where the working tree must be left |
153| `CLAUDE_RUNNER_CHECKOUT_PATH` | Absolute path where the working tree must be left. See [Checkout folder names](#checkout-folder-names). |
154154| `CLAUDE_RUNNER_SESSION_ID` | Session ID in the tagged `session_...` form, for logging and correlation |
155155| `CLAUDE_RUNNER_SESSION_UUID` | The same session ID in canonical UUID form |
156156| `CLAUDE_RUNNER_API_BASE_URL` | Anthropic API base URL for session-scoped calls |
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161161The script must leave a working tree at `CLAUDE_RUNNER_CHECKOUT_PATH` checked out at the requested revision. A detached HEAD works, because the runner creates the session's working branch on top.
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163163After your hook returns, the runner verifies that `CLAUDE_RUNNER_CHECKOUT_PATH` contains a `.git`. If your hook materializes a non-git source such as Perforce or an unpacked tarball, set `CLAUDE_RUNNER_SKIP_GIT_VERIFY=1` in the runner's environment to skip that check. Git-based flows such as working-branch creation and pushing results require a git checkout, so export outcomes from non-git trees with a [`post-session` hook](#post-session).
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165#### Checkout folder names
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167`CLAUDE_RUNNER_CHECKOUT_PATH` ends in a folder named `<repo-owner>-<repo>`, such as `acme-api`. Two repositories in a session can't share a folder, even when their names differ only in case. For example, if a session lists `acme/api` and then `Acme/API`, the first gets `acme-api` and the second gets `Acme-API-2`.
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165169#### Get git credentials in the hook
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