Self-hosted environments reference changedself-hosted-environments-reference
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9191| `--hook-timeout <sec>` | `60` | Terminate the hook's process tree after this many seconds. The timeout plus its 5-second kill grace must stay below `--expected-spawn-seconds`; the orchestrator enforces this at startup. |
9292| `--expected-spawn-seconds <sec>` | `120` | Expected p99 time from when the orchestrator receives a spawn request to when the runner registers, including any wait for capacity on your platform. The server enforces a range of 10 to 3600. Sent on every poll as the server-side lease: if no runner registers before it elapses, the session is re-offered with a fresh order ID. All replicas must share this value. |
9393| `--min-idle <n>` | `0` | Keep at least N idle session slots free by spawning standby runners proactively. `0` disables pre-warming. Pair with the runner's `--exit-if-unused-min` so surplus standby runners reclaim themselves. |
94| `--shutdown-drain-sec <n>` | `0` | On `SIGTERM`, stop polling for spawn requests and give running `spawn-runner` hooks and any unanswered poll up to this many seconds to finish before stopping what's left. At `0`, stop immediately. Maximum `3600`, which the orchestrator enforces at startup. To choose a value, see [Size `--shutdown-drain-sec` and the orchestrator's stop timeout](https://code.claude.com/docs/en/self-hosted-environments-configuration#size-shutdown-drain-sec-and-the-supervisors-stop-timeout-for-the-orchestrator). Requires Claude Code v2.1.299 or later. |
9495| `--debug-dir <path>` | unset | Write each spawn request's work order and hook stderr to disk. Debug only; never set in production. |
9596
9697### SCM connector flags
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