fix(install): add Jetson host setup to installer

scripts/install.sh

@@ -1189,6 +1189,7 @@ main() {
 
   _INSTALL_START=$SECONDS
   print_banner
+  bash "${SCRIPT_DIR}/setup-jetson.sh"
 
   step 1 "Node.js"
   install_nodejs

scripts/setup-jetson.sh

@@ -0,0 +1,84 @@
+#!/usr/bin/env bash
+# SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+set -euo pipefail
+
+SUDO=()
+((EUID != 0)) && SUDO=(sudo)
+
+info() {
+  printf "[INFO]  %s\n" "$*"
+}
+
+error() {
+  printf "[ERROR] %s\n" "$*" >&2
+  exit 1
+}
+
+get_jetpack_version() {
+  local release_line release revision l4t_version
+
+  release_line="$(head -n1 /etc/nv_tegra_release 2>/dev/null || true)"
+  [[ -n "$release_line" ]] || return 0
+
+  release="$(printf '%s\n' "$release_line" | sed -n 's/^# R\([0-9][0-9]*\) (release).*/\1/p')"
+  revision="$(printf '%s\n' "$release_line" | sed -n 's/^.*REVISION: \([0-9][0-9]*\)\..*$/\1/p')"
+  l4t_version="${release}.${revision}"
+
+  case "$l4t_version" in
+    36.*)
+      printf "%s" "jp6"
+      ;;
+    38.*)
+      printf "%s" "jp7"
+      ;;
+    *)
+      info "Jetson detected (L4T $l4t_version) but version is not recognized — skipping host setup"
+      ;;
+  esac
+}
+
+configure_jetson_host() {
+  local jetpack_version="$1"
+
+  if ((EUID != 0)); then
+    info "Jetson host configuration requires sudo. You may be prompted for your password."
+    "${SUDO[@]}" true >/dev/null || error "Sudo is required to apply Jetson host configuration."
+  fi
+
+  case "$jetpack_version" in
+    jp6)
+      "${SUDO[@]}" update-alternatives --set iptables /usr/sbin/iptables-legacy
+      "${SUDO[@]}" sed -i '/"iptables": false,/d; /"bridge": "none"/d; s/"default-runtime": "nvidia",/"default-runtime": "nvidia"/' /etc/docker/daemon.json
+      ;;
+    jp7)
+      # JP7 (Thor) does not need iptables or Docker daemon.json changes.
+      ;;
+    *)
+      error "Unsupported Jetson version: $jetpack_version"
+      ;;
+  esac
+
+  "${SUDO[@]}" modprobe br_netfilter
+  "${SUDO[@]}" sysctl -w net.bridge.bridge-nf-call-iptables=1 >/dev/null
+
+  # Persist across reboots
+  echo "br_netfilter" | "${SUDO[@]}" tee /etc/modules-load.d/nemoclaw.conf >/dev/null
+  echo "net.bridge.bridge-nf-call-iptables=1" | "${SUDO[@]}" tee /etc/sysctl.d/99-nemoclaw.conf >/dev/null
+
+  if [[ "$jetpack_version" == "jp6" ]]; then
+    "${SUDO[@]}" systemctl restart docker
+  fi
+}
+
+main() {
+  local jetpack_version
+  jetpack_version="$(get_jetpack_version)"
+  [[ -n "$jetpack_version" ]] || exit 0
+
+  info "Jetson detected ($jetpack_version) — applying required host configuration"
+  configure_jetson_host "$jetpack_version"
+}
+
+main "$@"

test/runner.test.ts

@@ -629,6 +629,13 @@ describe("regression guards", () => {
       );
     });
 
+    it("scripts/setup-jetson.sh exists and is executable", () => {
+      const scriptPath = path.join(import.meta.dirname, "..", "scripts", "setup-jetson.sh");
+      expect(fs.existsSync(scriptPath)).toBe(true);
+      const mode = fs.statSync(scriptPath).mode;
+      expect((mode & 0o111) !== 0).toBe(true);
+    });
+
     it("services no longer tell users to install brev-setup.sh", () => {
       const src = fs.readFileSync(
         path.join(import.meta.dirname, "..", "src", "lib", "services.ts"),