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references/prerequisites.md

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+# OpenClaw Prerequisites
+
+## Required
+`openclaw` CLI in `PATH`
+
+## Optional (feature-dependent)
+
+| Dependency | For |
+|-----------|-----|
+| Node.js + npm | Install/update flows |
+| Playwright deps | Browser tooling |
+| Tailscale | Remote node access |
+| Docker + Compose | Containerized deploy |
+| Nix | Flake environments |
+| CoreDNS | `dns setup --apply` (macOS, sudo) |
+| Google Cloud creds | Gmail webhook |
+
+## Environment Variables
+
+| Variable | Purpose |
+|----------|---------|
+| `OPENCLAW_CONFIG_PATH` | Override config file |
+| `OPENCLAW_STATE_DIR` | Override state dir |
+| `OPENCLAW_HOME` | Override home dir |
+| `OPENCLAW_GATEWAY_TOKEN` | Gateway token |
+| `OPENCLAW_GATEWAY_PASSWORD` | Gateway password |
+| `OPENCLAW_LOAD_SHELL_ENV=1` | Import shell env |
+| `OPENCLAW_AGENT_DIR` | Agent context scope |
+| `NO_COLOR=1` | Disable ANSI |
+| `OPENCLAW_WRAPPER_ALLOW_RISKY=1` | Wrapper high-risk gate |
+
+## Capability Boundaries
+- Low-risk by default: read, list, status, search, logs, docs
+- High-risk: see `security-policy.md`
+- Wrapper: `OPENCLAW_WRAPPER_ALLOW_RISKY=1` for risky command groups