diff --git a/docs/nodes/computer-use.md b/docs/nodes/computer-use.md
index 91d6db3c3fe2..feddf6fbcffb 100644
--- a/docs/nodes/computer-use.md
+++ b/docs/nodes/computer-use.md
@@ -72,7 +72,9 @@ Browser targets, pages, page elements, and dialogs are opaque capabilities. Reta
 
 ### Maintainer live-proof rig
 
-The repository includes a macOS-only development rig that preserves the real vertical path: agent-facing `computer` tool, Gateway `node.invoke`, paired Mac node, and the selected node-local provider. It is deliberately isolated from the operator app and Gateway.
+The repository includes a development rig that preserves the real vertical path: agent-facing `computer` tool, Gateway `node.invoke`, paired node, and the selected node-local provider. It is deliberately isolated from the operator app and Gateway. The macOS path uses the signed app node; the Linux path uses the opt-in `cua-computer` plugin in a real X11 session.
+
+#### macOS
 
 Build a signed app from a clean, committed checkout, choose a fresh profile and non-default loopback port, and prepare the two config views:
 
@@ -95,6 +97,35 @@ scripts/dev/computer-use-macos-live-rig.sh proof \
 
 The proof runner first requires the sole connected computer node to advertise the requested provider, then executes `screenshot`, `list_windows`, `get_window_state`, background element click and type, and re-observes the window. It saves the structured result and target-window before/after images under the scratch directory and fails unless the provider matches, the target started non-frontmost, the frontmost app and cursor stayed unchanged, target content changed, and the final effect was confirmed or a structured refusal. Restart the isolated app with the other provider and rerun the same proof. Do not use port `18789`, the default profile, or `/Applications/OpenClaw.app` for this rig.
 
+#### Linux X11 through Crabbox
+
+Run Linux proof on a Crabbox Linux host, not on a macOS container. A direct AWS Crabbox lease with Xvfb is sufficient because Xvfb is a real X11 server; a local container on macOS is not remote Linux desktop proof. Install the X11 fixture prerequisites on the disposable host, then start an isolated session:
+
+```bash
+sudo apt-get update
+sudo apt-get install -y at-spi2-core dbus-x11 gir1.2-gtk-3.0 jq openbox python3-gi x11-utils xdotool xvfb
+
+dbus-run-session -- bash
+export DISPLAY=:99 XDG_SESSION_TYPE=x11 NO_AT_BRIDGE=0
+Xvfb "$DISPLAY" -screen 0 1280x800x24 -nolisten tcp &
+openbox >/tmp/openclaw-cu-openbox.log 2>&1 &
+
+scratch="$(mktemp -d /tmp/openclaw-cu-live.XXXXXX)"
+scripts/dev/computer-use-macos-live-rig.sh prepare-linux \
+  cu-linux-live-proof 29431 "$scratch"
+```
+
+Run the emitted `gateway`, `node`, and `fixture` commands in separate panes that inherit the same `DISPLAY` and `DBUS_SESSION_BUS_ADDRESS`. The isolated configs share one scratch-only random Gateway token, and the gateway silently approves loopback node-device pairing. The node command surface remains an explicit approval: run the emitted `nodes` command after the node finishes reconnecting, read `.pending[0].requestId`, and pass it to `scripts/dev/computer-use-macos-live-rig.sh approve "$scratch" <request-id>`. Rerun `nodes` until exactly one connected node advertises `provider.id: "cua-computer"`.
+
+Execute the same proof runner against the non-frontmost GTK fixture:
+
+```bash
+scripts/dev/computer-use-macos-live-rig.sh proof \
+  "$scratch" cua "OpenClaw CUA X11 Target" "W3-LINUX CONFIRMED"
+```
+
+The result and `window-before.png` / `window-after.png` stay under the scratch directory. A confirmed mutation must preserve the sentinel as the active X11 window and leave the pointer unchanged. An upstream `background_unavailable` or `background_occluded` result is valid refusal evidence only when it remains structured and no foreground retry is attempted. The rig rejects native Wayland even when `DISPLAY` is also present for XWayland; switch to X11 instead of claiming Wayland coverage.
+
 ### Windows and Linux (experimental, direct SDK)
 
 The bundled `cua-computer` plugin provides an experimental fulfiller for Windows and Linux node hosts. It is disabled by default and uses the pinned CUA Driver SDK 0.19.3 contract directly:
diff --git a/extensions/cua-computer/src/driver-artifact-verification.ts b/extensions/cua-computer/src/driver-artifact-verification.ts
index 4416caca84b4..f0382000c0f2 100644
--- a/extensions/cua-computer/src/driver-artifact-verification.ts
+++ b/extensions/cua-computer/src/driver-artifact-verification.ts
@@ -40,7 +40,7 @@ type CuaDriverArtifactInspectionOptions = {
   platform: NodeJS.Platform;
   arch: string;
   linuxLibc?: "gnu" | "musl";
-  pluginManifestPath: string;
+  pluginManifest: unknown;
   resolvePackageJson: (packageName: string) => string | undefined;
 };
 
@@ -96,10 +96,10 @@ function isSha256(value: unknown): value is string {
 }
 
 function loadArtifactRecord(
-  manifestPath: string,
+  manifestValue: unknown,
   key: SupportedArtifactPlatform,
 ): { version: string; artifact: DriverArtifactRecord } | undefined {
-  const value = readJson(manifestPath) as CuaDriverManifest;
+  const value = manifestValue as CuaDriverManifest;
   const version = value.dependencies?.[DRIVER_PACKAGE];
   const artifact = value.cuaDriverArtifacts?.[key];
   if (
@@ -139,7 +139,7 @@ export function inspectCuaDriverArtifacts(
 
   let accepted: ReturnType<typeof loadArtifactRecord>;
   try {
-    accepted = loadArtifactRecord(options.pluginManifestPath, selected.key);
+    accepted = loadArtifactRecord(options.pluginManifest, selected.key);
   } catch {
     accepted = undefined;
   }
diff --git a/extensions/cua-computer/src/driver-artifacts-resolution.test.ts b/extensions/cua-computer/src/driver-artifacts-resolution.test.ts
new file mode 100644
index 000000000000..b3954d2f6cf4
--- /dev/null
+++ b/extensions/cua-computer/src/driver-artifacts-resolution.test.ts
@@ -0,0 +1,34 @@
+import { expect, it, vi } from "vitest";
+
+const mocks = vi.hoisted(() => ({
+  inspect: vi.fn(() => ({ ok: true, applicable: false }) as const),
+}));
+
+vi.mock("./driver-artifact-verification.js", () => ({
+  inspectCuaDriverArtifacts: mocks.inspect,
+  readPackageIdentity: vi.fn(),
+}));
+
+import { verifyInstalledCuaDriverArtifacts } from "./driver-artifacts.js";
+
+it("supplies the accepted artifact record without depending on the bundled module path", () => {
+  verifyInstalledCuaDriverArtifacts();
+
+  expect(mocks.inspect).toHaveBeenCalledWith(
+    expect.objectContaining({
+      pluginManifest: expect.objectContaining({
+        dependencies: expect.objectContaining({ "@trycua/cua-driver": "0.19.3" }),
+        cuaDriverArtifacts: expect.objectContaining({
+          "win32-arm64-msvc": {
+            files: {
+              "cua_driver_node_runtime.node":
+                "fe025669d1614b1ac9a82d1b6a331acd15b44caef81e5bda6a0b02e1d9a4b71f",
+              "cua_driver_sdk.dll":
+                "f1f25699dbdcc05169230b8286800b69a10407abb20effd5b767629fe725f21b",
+            },
+          },
+        }),
+      }),
+    }),
+  );
+});
diff --git a/extensions/cua-computer/src/driver-artifacts.test.ts b/extensions/cua-computer/src/driver-artifacts.test.ts
index 0c9e1cf3616b..da2f04a046d1 100644
--- a/extensions/cua-computer/src/driver-artifacts.test.ts
+++ b/extensions/cua-computer/src/driver-artifacts.test.ts
@@ -30,17 +30,16 @@ function createArtifactFixture(
   const nativeContents = "accepted native artifact";
   const expectedDigest =
     options.expectedDigest ?? createHash("sha256").update(nativeContents).digest("hex");
-  const pluginManifestPath = path.join(root, "plugin-package.json");
   const sdkManifestPath = path.join(root, "sdk-package.json");
   const platformPackageName = `@trycua/cua-driver-${platformKey}`;
   const platformDir = path.join(root, "platform");
   const platformManifestPath = path.join(platformDir, "package.json");
 
   fs.mkdirSync(platformDir);
-  writeJson(pluginManifestPath, {
+  const pluginManifest = {
     dependencies: { "@trycua/cua-driver": acceptedVersion },
     cuaDriverArtifacts: { [platformKey]: { files: { [nativeFile]: expectedDigest } } },
-  });
+  };
   writeJson(sdkManifestPath, {
     name: "@trycua/cua-driver",
     version: options.sdkVersion ?? acceptedVersion,
@@ -56,7 +55,7 @@ function createArtifactFixture(
     packages.set(platformPackageName, platformManifestPath);
   }
   return {
-    pluginManifestPath,
+    pluginManifest,
     resolvePackageJson: (packageName: string) => packages.get(packageName),
   };
 }
diff --git a/extensions/cua-computer/src/driver-artifacts.ts b/extensions/cua-computer/src/driver-artifacts.ts
index 4b27a2f4b300..df4b3ba711de 100644
--- a/extensions/cua-computer/src/driver-artifacts.ts
+++ b/extensions/cua-computer/src/driver-artifacts.ts
@@ -1,13 +1,12 @@
 import { createRequire } from "node:module";
 import path from "node:path";
-import { fileURLToPath } from "node:url";
+import pluginManifest from "../package.json" with { type: "json" };
 import {
   inspectCuaDriverArtifacts,
   readPackageIdentity,
   type CuaDriverArtifactVerification,
 } from "./driver-artifact-verification.js";
 
-const PLUGIN_MANIFEST_PATH = fileURLToPath(new URL("../package.json", import.meta.url));
 const requireFromPlugin = createRequire(import.meta.url);
 
 function resolvePackageJson(packageName: string): string | undefined {
@@ -50,7 +49,7 @@ export function verifyInstalledCuaDriverArtifacts(): CuaDriverArtifactVerificati
     platform: process.platform,
     arch: process.arch,
     ...(process.platform === "linux" ? { linuxLibc: detectLinuxLibc() } : {}),
-    pluginManifestPath: PLUGIN_MANIFEST_PATH,
+    pluginManifest,
     resolvePackageJson,
   });
   return installedVerification;
diff --git a/scripts/dev/computer-use-linux-x11-fixture.py b/scripts/dev/computer-use-linux-x11-fixture.py
new file mode 100644
index 000000000000..c5ae25680d70
--- /dev/null
+++ b/scripts/dev/computer-use-linux-x11-fixture.py
@@ -0,0 +1,38 @@
+#!/usr/bin/env python3
+
+import argparse
+
+import gi
+
+gi.require_version("Gtk", "3.0")
+from gi.repository import Gtk  # noqa: E402
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser(description="OpenClaw Linux X11 computer-use fixture")
+    parser.add_argument("--title", required=True)
+    parser.add_argument("--text", required=True)
+    args = parser.parse_args()
+
+    window = Gtk.Window(title=args.title)
+    window.set_default_size(520, 180)
+    window.connect("destroy", Gtk.main_quit)
+
+    box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, spacing=12)
+    box.set_border_width(24)
+    label = Gtk.Label(label="Background-edit target")
+    label.set_xalign(0)
+    entry = Gtk.Entry()
+    entry.set_name("Editor")
+    entry.set_text(args.text)
+    entry.set_activates_default(False)
+
+    box.pack_start(label, False, False, 0)
+    box.pack_start(entry, False, False, 0)
+    window.add(box)
+    window.show_all()
+    Gtk.main()
+
+
+if __name__ == "__main__":
+    main()
diff --git a/scripts/dev/computer-use-macos-live-proof.ts b/scripts/dev/computer-use-macos-live-proof.ts
index b3d6587ca346..8aa98664ced0 100644
--- a/scripts/dev/computer-use-macos-live-proof.ts
+++ b/scripts/dev/computer-use-macos-live-proof.ts
@@ -20,7 +20,7 @@ const { values } = parseArgs({
 
 if (values.help) {
   console.log(
-    "Usage: computer-use-macos-live-proof.ts --provider <peekaboo|cua> --window-title <title> --text <text> --artifacts <dir> [--element-label <label>]",
+    "Usage: computer-use-macos-live-proof.ts --provider <peekaboo|cua> --window-title <title> --text <text> --artifacts <dir> [--element-label <label>]\nRuns on macOS or an X11 Linux session; native Wayland is intentionally refused.",
   );
   process.exit(0);
 }
@@ -187,11 +187,29 @@ async function saveImage(name: string, result: ToolResult): Promise<string> {
   return output;
 }
 
-async function frontmostApp(): Promise<string> {
-  const script =
-    'tell application "System Events" to get name of first application process whose frontmost is true';
-  const { stdout } = await execFileAsync("/usr/bin/osascript", ["-e", script]);
-  return stdout.trim();
+type FrontmostState = { kind: "application" | "window"; name: string };
+
+async function frontmostState(): Promise<FrontmostState> {
+  if (process.platform === "darwin") {
+    const script =
+      'tell application "System Events" to get name of first application process whose frontmost is true';
+    const { stdout } = await execFileAsync("/usr/bin/osascript", ["-e", script]);
+    return { kind: "application", name: stdout.trim() };
+  }
+  if (process.platform === "linux") {
+    if (process.env.XDG_SESSION_TYPE === "wayland" || process.env.WAYLAND_DISPLAY) {
+      throw new Error("Linux live proof requires X11; native Wayland is out of scope");
+    }
+    const { stdout: windowId } = await execFileAsync("xdotool", ["getactivewindow"]);
+    const { stdout: title } = await execFileAsync("xdotool", ["getwindowname", windowId.trim()]);
+    return { kind: "window", name: title.trim() };
+  }
+  throw new Error(`frontmost-window proof is unsupported on ${process.platform}`);
+}
+
+function isTargetFrontmost(frontmost: FrontmostState, target: JsonRecord): boolean {
+  const targetIdentity = frontmost.kind === "application" ? target.appName : target.title;
+  return typeof targetIdentity === "string" && frontmost.name === targetIdentity;
 }
 
 function cursor(result: ToolResult): { x: unknown; y: unknown } {
@@ -257,10 +275,10 @@ const targetFields = {
   observationId,
   deliveryMode: "background",
 };
-const frontmostBefore = await frontmostApp();
-if (frontmostBefore === target.appName) {
+const frontmostBefore = await frontmostState();
+if (isTargetFrontmost(frontmostBefore, target)) {
   throw new Error(
-    `target app ${stringValue(target.appName) || "<unknown>"} is frontmost; foreground another app and retry`,
+    `target ${frontmostBefore.kind} ${frontmostBefore.name || "<unknown>"} is frontmost; foreground another window and retry`,
   );
 }
 const cursorBeforeResult = await call("get_cursor_position");
@@ -282,7 +300,7 @@ if (typed.kind === "error" || wireResult(typed.result).effect !== "confirmed") {
 }
 
 const cursorAfterResult = await call("get_cursor_position");
-const frontmostAfter = await frontmostApp();
+const frontmostAfter = await frontmostState();
 const after = await call("get_window_state", { windowRef: target.windowRef });
 const afterImage = await saveImage("window-after", after);
 const afterElement = selectElement(after);
@@ -291,7 +309,8 @@ const cursorAfter = cursor(cursorAfterResult);
 const finalOutcome = confirmation ?? typed;
 
 const evidence = {
-  route: "agent computer tool -> Gateway node.invoke -> paired Mac node -> selected provider",
+  route: "agent computer tool -> Gateway node.invoke -> paired node -> selected provider",
+  platform: process.platform,
   provider: { expected: expectedProviderId, advertised: advertisedProvider },
   screenshot: resultText(screenshot),
   target: {
@@ -317,8 +336,9 @@ const evidence = {
   },
   artifacts: { beforeImage, afterImage },
   assertions: {
-    targetWasNotFrontmost: frontmostBefore !== target.appName,
-    frontmostUnchanged: frontmostBefore === frontmostAfter,
+    targetWasNotFrontmost: !isTargetFrontmost(frontmostBefore, target),
+    frontmostUnchanged:
+      frontmostBefore.kind === frontmostAfter.kind && frontmostBefore.name === frontmostAfter.name,
     cursorUnchanged: cursorBefore.x === cursorAfter.x && cursorBefore.y === cursorAfter.y,
     targetContentChanged: beforeElement.value !== afterElement.value,
     confirmedEffectOrStructuredRefusal: structuredOutcome(finalOutcome),
diff --git a/scripts/dev/computer-use-macos-live-rig.sh b/scripts/dev/computer-use-macos-live-rig.sh
index 662e21f43490..95da11554169 100755
--- a/scripts/dev/computer-use-macos-live-rig.sh
+++ b/scripts/dev/computer-use-macos-live-rig.sh
@@ -8,14 +8,20 @@ usage() {
   cat <<'EOF'
 Usage:
   scripts/dev/computer-use-macos-live-rig.sh prepare <profile> <port> <app> <scratch> [peekaboo|cua]
+  scripts/dev/computer-use-macos-live-rig.sh prepare-linux <profile> <port> <scratch>
   scripts/dev/computer-use-macos-live-rig.sh gateway <scratch>
   scripts/dev/computer-use-macos-live-rig.sh app <scratch> [peekaboo|cua]
+  scripts/dev/computer-use-macos-live-rig.sh node <scratch>
+  scripts/dev/computer-use-macos-live-rig.sh fixture <scratch> <target-title> <sentinel-title> <before-text>
   scripts/dev/computer-use-macos-live-rig.sh nodes <scratch>
+  scripts/dev/computer-use-macos-live-rig.sh approve <scratch> <request-id>
   scripts/dev/computer-use-macos-live-rig.sh proof <scratch> <peekaboo|cua> <window-title> <text> [element-label]
 
-The rig is maintainer-only and loopback-only. Run gateway and app in separate
-terminals, approve the dedicated CLI device after its first `nodes` request,
-then run `proof`. Never use the operator profile or port 18789.
+The rig is maintainer-only and loopback-only. On macOS, run gateway and app in
+separate terminals. On Linux X11, run gateway, node, and fixture in separate
+terminals that share DISPLAY and DBUS_SESSION_BUS_ADDRESS. Approve the isolated
+node command surface after its first request, then run proof. Never use the
+operator profile or port 18789. Native Wayland is intentionally unsupported.
 EOF
 }
 
@@ -33,11 +39,27 @@ validate_provider() {
 
 require_unoccupied_port() {
   local port="$1"
-  if /usr/sbin/lsof -nP -iTCP:"$port" -sTCP:LISTEN -t >/dev/null 2>&1; then
+  if ! node - "$port" >/dev/null 2>&1 <<'NODE'; then
+const net = require("node:net");
+const port = Number(process.argv[2]);
+const server = net.createServer();
+server.once("error", () => process.exit(1));
+server.listen({ host: "127.0.0.1", port, exclusive: true }, () => server.close());
+NODE
     fail "port $port already has a listener; choose a fresh proof port"
   fi
 }
 
+require_linux_x11() {
+  [[ "$(uname -s)" == "Linux" ]] || fail "Linux proof must run on a Linux host"
+  [[ "${XDG_SESSION_TYPE:-}" != "wayland" && -z "${WAYLAND_DISPLAY:-}" ]] ||
+    fail "native Wayland is out of scope; switch to an X11 session"
+  [[ -n "${DISPLAY:-}" ]] || fail "DISPLAY is required for Linux X11 proof"
+  command -v xdpyinfo >/dev/null || fail "xdpyinfo is required for Linux X11 proof"
+  command -v xdotool >/dev/null || fail "xdotool is required for Linux X11 proof"
+  xdpyinfo >/dev/null 2>&1 || fail "DISPLAY does not resolve to a live X11 server"
+}
+
 load_rig() {
   local scratch="$1"
   [[ "$scratch" = /* ]] || fail "scratch path must be absolute"
@@ -49,14 +71,26 @@ load_rig() {
   done < <(node - "$rig_path" <<'NODE'
 const fs = require("node:fs");
 const path = process.argv[2];
-const keys = ["root", "profile", "port", "app", "appState", "gatewayConfig", "agentState"];
+const macKeys = ["root", "profile", "port", "app", "appState", "gatewayConfig", "agentState"];
+const linuxKeys = [
+    "platform", "root", "profile", "port", "gatewayConfig", "gatewayState",
+    "agentState", "nodeConfig", "nodeState", "display",
+  ];
 try {
   const value = JSON.parse(fs.readFileSync(path, "utf8"));
   if (!value || typeof value !== "object" || Array.isArray(value)) throw new Error("expected object");
   const actualKeys = Object.keys(value).sort();
-  if (actualKeys.join("\0") !== [...keys].sort().join("\0")) throw new Error("unexpected fields");
+  const isMac = actualKeys.join("\0") === [...macKeys].sort().join("\0");
+  const isLinux = actualKeys.join("\0") === [...linuxKeys].sort().join("\0");
+  if (!isMac && !isLinux) throw new Error("unexpected fields");
   if (!Number.isInteger(value.port)) throw new Error("port must be an integer");
-  const fields = [value.root, value.profile, String(value.port), value.app, value.appState, value.gatewayConfig, value.agentState];
+  if (isLinux && value.platform !== "linux") throw new Error("invalid platform");
+  const fields = isMac
+    ? ["macos", value.root, value.profile, String(value.port), value.app, value.appState,
+        value.gatewayConfig, value.agentState, "", "", "", value.appState]
+    : [value.platform, value.root, value.profile, String(value.port), "", "",
+        value.gatewayConfig, value.agentState, value.nodeConfig, value.nodeState,
+        value.display, value.gatewayState];
   if (fields.some((field) => typeof field !== "string" || field.includes("\0"))) throw new Error("invalid field");
   process.stdout.write(`${fields.join("\0")}\0`);
 } catch (error) {
@@ -65,27 +99,48 @@ try {
 }
 NODE
   )
-  [[ ${#rig_values[@]} -eq 7 ]] || fail "invalid $rig_path"
-  OPENCLAW_CU_RIG_ROOT="${rig_values[0]}"
-  OPENCLAW_CU_RIG_PROFILE="${rig_values[1]}"
-  OPENCLAW_CU_RIG_PORT="${rig_values[2]}"
-  OPENCLAW_CU_RIG_APP="${rig_values[3]}"
-  OPENCLAW_CU_RIG_APP_STATE="${rig_values[4]}"
-  OPENCLAW_CU_RIG_GATEWAY_CONFIG="${rig_values[5]}"
-  OPENCLAW_CU_RIG_AGENT_STATE="${rig_values[6]}"
+  [[ ${#rig_values[@]} -eq 12 ]] || fail "invalid $rig_path"
+  OPENCLAW_CU_RIG_PLATFORM="${rig_values[0]}"
+  OPENCLAW_CU_RIG_ROOT="${rig_values[1]}"
+  OPENCLAW_CU_RIG_PROFILE="${rig_values[2]}"
+  OPENCLAW_CU_RIG_PORT="${rig_values[3]}"
+  OPENCLAW_CU_RIG_APP="${rig_values[4]}"
+  OPENCLAW_CU_RIG_APP_STATE="${rig_values[5]}"
+  OPENCLAW_CU_RIG_GATEWAY_CONFIG="${rig_values[6]}"
+  OPENCLAW_CU_RIG_AGENT_STATE="${rig_values[7]}"
+  OPENCLAW_CU_RIG_NODE_CONFIG="${rig_values[8]}"
+  OPENCLAW_CU_RIG_NODE_STATE="${rig_values[9]}"
+  OPENCLAW_CU_RIG_DISPLAY="${rig_values[10]}"
+  OPENCLAW_CU_RIG_GATEWAY_STATE="${rig_values[11]}"
   [[ "$OPENCLAW_CU_RIG_ROOT" == "$repo_root" ]] ||
     fail "rig belongs to a different checkout: $OPENCLAW_CU_RIG_ROOT"
   [[ "$OPENCLAW_CU_RIG_PROFILE" =~ ^[A-Za-z0-9][A-Za-z0-9_-]+$ ]] || fail "invalid rig profile"
   [[ "$OPENCLAW_CU_RIG_PORT" =~ ^[0-9]+$ ]] || fail "invalid rig port"
   ((OPENCLAW_CU_RIG_PORT >= 1024 && OPENCLAW_CU_RIG_PORT <= 65535)) || fail "invalid rig port"
   ((OPENCLAW_CU_RIG_PORT != 18789)) || fail "operator port is not valid rig state"
-  [[ "$OPENCLAW_CU_RIG_APP" = /* ]] || fail "invalid rig app path"
-  [[ "$OPENCLAW_CU_RIG_APP_STATE" == "$HOME/.openclaw-$OPENCLAW_CU_RIG_PROFILE" ]] ||
-    fail "rig app state does not match its profile"
   [[ "$OPENCLAW_CU_RIG_GATEWAY_CONFIG" == "$scratch/gateway.json" ]] ||
     fail "rig gateway config is outside its scratch directory"
   [[ "$OPENCLAW_CU_RIG_AGENT_STATE" == "$scratch/agent-state" ]] ||
     fail "rig agent state is outside its scratch directory"
+  case "$OPENCLAW_CU_RIG_PLATFORM" in
+    macos)
+      [[ "$OPENCLAW_CU_RIG_APP" = /* ]] || fail "invalid rig app path"
+      [[ "$OPENCLAW_CU_RIG_APP_STATE" == "$HOME/.openclaw-$OPENCLAW_CU_RIG_PROFILE" ]] ||
+        fail "rig app state does not match its profile"
+      [[ "$OPENCLAW_CU_RIG_GATEWAY_STATE" == "$OPENCLAW_CU_RIG_APP_STATE" ]] ||
+        fail "invalid macOS gateway state"
+      ;;
+    linux)
+      [[ "$OPENCLAW_CU_RIG_NODE_CONFIG" == "$scratch/node.json" ]] ||
+        fail "rig node config is outside its scratch directory"
+      [[ "$OPENCLAW_CU_RIG_NODE_STATE" == "$scratch/node-state" ]] ||
+        fail "rig node state is outside its scratch directory"
+      [[ "$OPENCLAW_CU_RIG_GATEWAY_STATE" == "$scratch/gateway-state" ]] ||
+        fail "rig gateway state is outside its scratch directory"
+      [[ -n "$OPENCLAW_CU_RIG_DISPLAY" ]] || fail "invalid Linux display"
+      ;;
+    *) fail "invalid rig platform" ;;
+  esac
 }
 
 prepare() {
@@ -115,9 +170,9 @@ prepare() {
   codesign --verify --deep --strict "$app_path" >/dev/null 2>&1 ||
     fail "app is not a valid signed bundle: $app_path"
 
-  git -C "$repo_root" diff --quiet -- src packages extensions scripts/run-node.mjs scripts/run-node.mts ||
+  git -C "$repo_root" diff --quiet -- src packages extensions scripts ||
     fail "runtime sources are dirty; commit and rebuild before launching the node worker"
-  git -C "$repo_root" diff --cached --quiet -- src packages extensions scripts/run-node.mjs scripts/run-node.mts ||
+  git -C "$repo_root" diff --cached --quiet -- src packages extensions scripts ||
     fail "runtime sources are staged but uncommitted; commit and rebuild first"
 
   local app_state="$HOME/.openclaw-$profile"
@@ -184,20 +239,108 @@ NODE
   echo "nodes:   $0 nodes $scratch"
 }
 
+prepare_linux() {
+  [[ $# -eq 3 ]] || { usage; exit 2; }
+  local profile="$1"
+  local port="$2"
+  local scratch="$3"
+
+  require_linux_x11
+  [[ "$profile" =~ ^[A-Za-z0-9][A-Za-z0-9_-]+$ ]] ||
+    fail "profile must contain only letters, digits, underscores, and dashes"
+  case "$profile" in
+    default | main | local) fail "choose a fresh, explicitly isolated profile" ;;
+  esac
+  [[ "$port" =~ ^[0-9]+$ ]] || fail "port must be numeric"
+  ((port >= 1024 && port <= 65535)) || fail "port must be between 1024 and 65535"
+  ((port != 18789)) || fail "port 18789 belongs to the operator gateway"
+  [[ "$scratch" = /* ]] || fail "scratch path must be absolute"
+  require_unoccupied_port "$port"
+
+  git -C "$repo_root" diff --quiet -- src packages extensions scripts ||
+    fail "runtime sources are dirty; commit and rebuild before launching the node worker"
+  git -C "$repo_root" diff --cached --quiet -- src packages extensions scripts ||
+    fail "runtime sources are staged but uncommitted; commit and rebuild first"
+
+  [[ ! -e "$scratch/rig.json" ]] || fail "$scratch already contains a rig"
+  mkdir -p "$scratch/agent-state" "$scratch/gateway-state" "$scratch/node-state"
+  local gateway_config="$scratch/gateway.json"
+  local node_config="$scratch/node.json"
+  local gateway_token
+  gateway_token="$(node -e 'process.stdout.write(require("node:crypto").randomBytes(32).toString("hex"))')"
+
+  node - "$port" "$gateway_token" >"$gateway_config" <<'NODE'
+const port = Number(process.argv[2]);
+const token = process.argv[3];
+process.stdout.write(`${JSON.stringify({
+  gateway: {
+    mode: "local",
+    port,
+    auth: { mode: "token", token },
+    nodes: {
+      commands: { allow: ["computer.act"] },
+      pairing: { autoApproveLocal: true, sshVerify: false },
+    },
+  },
+}, null, 2)}\n`);
+NODE
+
+  node - "$port" "$gateway_token" >"$node_config" <<'NODE'
+const port = Number(process.argv[2]);
+const token = process.argv[3];
+process.stdout.write(`${JSON.stringify({
+  gateway: {
+    mode: "remote",
+    remote: { transport: "direct", url: `ws://127.0.0.1:${port}`, token },
+  },
+  browser: { enabled: false },
+  nodeHost: { browserProxy: { enabled: false } },
+  plugins: { entries: { "cua-computer": { enabled: true } } },
+}, null, 2)}\n`);
+NODE
+
+  node - "$repo_root" "$profile" "$port" "$gateway_config" "$scratch/gateway-state" \
+    "$scratch/agent-state" "$node_config" "$scratch/node-state" "$DISPLAY" >"$scratch/rig.json" <<'NODE'
+const [root, profile, port, gatewayConfig, gatewayState, agentState, nodeConfig, nodeState, display] = process.argv.slice(2);
+process.stdout.write(`${JSON.stringify({
+  platform: "linux",
+  root,
+  profile,
+  port: Number(port),
+  gatewayConfig,
+  gatewayState,
+  agentState,
+  nodeConfig,
+  nodeState,
+  display,
+}, null, 2)}\n`);
+NODE
+  chmod 600 "$gateway_config" "$node_config" "$scratch/rig.json"
+
+  echo "prepared isolated Linux X11 profile $profile on ws://127.0.0.1:$port ($DISPLAY)"
+  echo "gateway: $0 gateway $scratch"
+  echo "node:    $0 node $scratch"
+  echo "fixture: $0 fixture $scratch 'OpenClaw CUA X11 Target' 'OpenClaw X11 Sentinel' 'W3-LINUX BEFORE'"
+  echo "nodes:   $0 nodes $scratch"
+}
+
 run_gateway() {
   [[ $# -eq 1 ]] || { usage; exit 2; }
   load_rig "$1"
   require_unoccupied_port "$OPENCLAW_CU_RIG_PORT"
+  local auth_mode="none"
+  [[ "$OPENCLAW_CU_RIG_PLATFORM" == "linux" ]] && auth_mode="token"
   exec env \
     OPENCLAW_CONFIG_PATH="$OPENCLAW_CU_RIG_GATEWAY_CONFIG" \
-    OPENCLAW_STATE_DIR="$OPENCLAW_CU_RIG_APP_STATE" \
+    OPENCLAW_STATE_DIR="$OPENCLAW_CU_RIG_GATEWAY_STATE" \
     node "$repo_root/scripts/run-node.mjs" --profile "$OPENCLAW_CU_RIG_PROFILE" \
-      gateway run --port "$OPENCLAW_CU_RIG_PORT" --auth none --verbose
+      gateway run --port "$OPENCLAW_CU_RIG_PORT" --auth "$auth_mode" --verbose
 }
 
 run_app() {
   [[ $# -ge 1 && $# -le 2 ]] || { usage; exit 2; }
   load_rig "$1"
+  [[ "$OPENCLAW_CU_RIG_PLATFORM" == "macos" ]] || fail "app is available only for macOS rigs"
   local provider="${2:-peekaboo}"
   validate_provider "$provider"
   defaults write "ai.openclaw.mac.profile.$OPENCLAW_CU_RIG_PROFILE" \
@@ -206,6 +349,54 @@ run_app() {
     "$OPENCLAW_CU_RIG_APP/Contents/MacOS/OpenClaw"
 }
 
+run_node() {
+  [[ $# -eq 1 ]] || { usage; exit 2; }
+  load_rig "$1"
+  [[ "$OPENCLAW_CU_RIG_PLATFORM" == "linux" ]] || fail "node is available only for Linux rigs"
+  require_linux_x11
+  [[ "$DISPLAY" == "$OPENCLAW_CU_RIG_DISPLAY" ]] || fail "DISPLAY does not match rig state"
+  exec env \
+    DISPLAY="$OPENCLAW_CU_RIG_DISPLAY" \
+    OPENCLAW_CONFIG_PATH="$OPENCLAW_CU_RIG_NODE_CONFIG" \
+    OPENCLAW_STATE_DIR="$OPENCLAW_CU_RIG_NODE_STATE" \
+    node "$repo_root/scripts/run-node.mjs" --profile "$OPENCLAW_CU_RIG_PROFILE" \
+      node run --host 127.0.0.1 --port "$OPENCLAW_CU_RIG_PORT" \
+      --display-name "OpenClaw CUA X11 Live Proof"
+}
+
+run_fixture() {
+  [[ $# -eq 4 ]] || { usage; exit 2; }
+  local scratch="$1"
+  load_rig "$scratch"
+  [[ "$OPENCLAW_CU_RIG_PLATFORM" == "linux" ]] || fail "fixture is available only for Linux rigs"
+  require_linux_x11
+  [[ "$DISPLAY" == "$OPENCLAW_CU_RIG_DISPLAY" ]] || fail "DISPLAY does not match rig state"
+  command -v python3 >/dev/null || fail "python3 is required for the Linux proof fixture"
+  command -v xmessage >/dev/null || fail "xmessage is required for the Linux proof sentinel"
+
+  local target_title="$2"
+  local sentinel_title="$3"
+  local before_text="$4"
+  local target_pid sentinel_pid target_window sentinel_window
+  python3 "$repo_root/scripts/dev/computer-use-linux-x11-fixture.py" \
+    --title "$target_title" --text "$before_text" &
+  target_pid=$!
+  xmessage -title "$sentinel_title" "This window must remain frontmost during proof." &
+  sentinel_pid=$!
+  trap 'kill "$target_pid" "$sentinel_pid" >/dev/null 2>&1 || true' EXIT INT TERM
+
+  for _ in {1..100}; do
+    target_window="$(xdotool search --name "$target_title" 2>/dev/null | head -n 1 || true)"
+    sentinel_window="$(xdotool search --name "$sentinel_title" 2>/dev/null | head -n 1 || true)"
+    [[ -n "$target_window" && -n "$sentinel_window" ]] && break
+    sleep 0.1
+  done
+  [[ -n "$target_window" && -n "$sentinel_window" ]] || fail "fixture windows did not appear"
+  xdotool windowactivate --sync "$sentinel_window"
+  echo "fixture ready: target=$target_window sentinel=$sentinel_window"
+  wait "$target_pid"
+}
+
 run_nodes() {
   [[ $# -eq 1 ]] || { usage; exit 2; }
   load_rig "$1"
@@ -215,12 +406,26 @@ run_nodes() {
     node "$repo_root/scripts/run-node.mjs" nodes list --json
 }
 
+run_approve() {
+  [[ $# -eq 2 ]] || { usage; exit 2; }
+  load_rig "$1"
+  exec env \
+    OPENCLAW_CONFIG_PATH="$OPENCLAW_CU_RIG_GATEWAY_CONFIG" \
+    OPENCLAW_STATE_DIR="$OPENCLAW_CU_RIG_AGENT_STATE" \
+    node "$repo_root/scripts/run-node.mjs" nodes approve "$2" --json
+}
+
 run_proof() {
   [[ $# -ge 4 && $# -le 5 ]] || { usage; exit 2; }
   local scratch="$1"
   load_rig "$scratch"
   local provider="$2"
   validate_provider "$provider"
+  if [[ "$OPENCLAW_CU_RIG_PLATFORM" == "linux" ]]; then
+    [[ "$provider" == "cua" ]] || fail "Linux rig supports only the CUA provider"
+    require_linux_x11
+    [[ "$DISPLAY" == "$OPENCLAW_CU_RIG_DISPLAY" ]] || fail "DISPLAY does not match rig state"
+  fi
   local args=(
     --provider "$provider"
     --window-title "$3"
@@ -241,9 +446,13 @@ command_name="${1:-}"
 shift
 case "$command_name" in
   prepare) prepare "$@" ;;
+  prepare-linux) prepare_linux "$@" ;;
   gateway) run_gateway "$@" ;;
   app) run_app "$@" ;;
+  node) run_node "$@" ;;
+  fixture) run_fixture "$@" ;;
   nodes) run_nodes "$@" ;;
+  approve) run_approve "$@" ;;
   proof) run_proof "$@" ;;
   -h | --help | help) usage ;;
   *) usage; exit 2 ;;
diff --git a/src/gateway/node-computer-use-descriptor.ts b/src/gateway/node-computer-use-descriptor.ts
new file mode 100644
index 000000000000..598c469c302b
--- /dev/null
+++ b/src/gateway/node-computer-use-descriptor.ts
@@ -0,0 +1,11 @@
+import type { ComputerUseCapabilityDescriptor } from "../plugins/computer-use-contract.js";
+
+/** Publish Computer Use metadata only after the command pair is effective for this session. */
+export function resolveEffectiveComputerUseDescriptor(params: {
+  commands: readonly string[];
+  declared?: ComputerUseCapabilityDescriptor;
+}): ComputerUseCapabilityDescriptor | undefined {
+  return params.commands.includes("computer.act") && params.commands.includes("screen.snapshot")
+    ? params.declared
+    : undefined;
+}
diff --git a/src/gateway/node-connect-reconcile.test.ts b/src/gateway/node-connect-reconcile.test.ts
index ed8f5d37ff4b..c0fd20661f98 100644
--- a/src/gateway/node-connect-reconcile.test.ts
+++ b/src/gateway/node-connect-reconcile.test.ts
@@ -10,10 +10,8 @@ import type { ConnectParams } from "../../packages/gateway-protocol/src/index.js
 import type { NodePairingRequestInput, PairedDeviceNode } from "../infra/device-pairing-node.js";
 import { createEmptyPluginRegistry } from "../plugins/registry-empty.js";
 import { resetPluginRuntimeStateForTest, setActivePluginRegistry } from "../plugins/runtime.js";
-import {
-  reconcileNodePairingOnConnect,
-  resolveEffectiveComputerUseDescriptor,
-} from "./node-connect-reconcile.js";
+import { resolveEffectiveComputerUseDescriptor } from "./node-computer-use-descriptor.js";
+import { reconcileNodePairingOnConnect } from "./node-connect-reconcile.js";
 
 function makeNodeConnectParams(overrides?: Partial<ConnectParams>): ConnectParams {
   return {
diff --git a/src/gateway/node-connect-reconcile.ts b/src/gateway/node-connect-reconcile.ts
index c2b9a6658ead..ce299534f443 100644
--- a/src/gateway/node-connect-reconcile.ts
+++ b/src/gateway/node-connect-reconcile.ts
@@ -33,16 +33,6 @@ type NodeConnectPairingReconcileResult = {
   shouldClearPendingPairings?: boolean;
 };
 
-/** Publish Computer Use metadata only after the command pair is effective for this session. */
-export function resolveEffectiveComputerUseDescriptor(params: {
-  commands: readonly string[];
-  declared?: ComputerUseCapabilityDescriptor;
-}): ComputerUseCapabilityDescriptor | undefined {
-  return params.commands.includes("computer.act") && params.commands.includes("screen.snapshot")
-    ? params.declared
-    : undefined;
-}
-
 function resolveApprovedReconnectCommands(params: {
   pairedCommands: readonly string[] | undefined;
   allowlist: Set<string>;
diff --git a/src/gateway/node-registry.test.ts b/src/gateway/node-registry.test.ts
index 902bbc17a855..ce17a95c10df 100644
--- a/src/gateway/node-registry.test.ts
+++ b/src/gateway/node-registry.test.ts
@@ -109,6 +109,7 @@ function makeClient(
     caps?: string[];
     commands?: string[];
     computerUse?: unknown;
+    declaredComputerUse?: unknown;
     workerRuns?: WorkerAdmissionHandshake;
     permissions?: Record<string, boolean>;
     declaredCaps?: string[];
@@ -143,6 +144,7 @@ function makeClient(
       caps: opts.caps ?? [],
       commands: opts.commands ?? [],
       computerUse: opts.computerUse,
+      declaredComputerUse: opts.declaredComputerUse,
       workerRuns: opts.workerRuns,
       permissions: opts.permissions,
       declaredCaps: opts.declaredCaps,
@@ -295,18 +297,22 @@ function authorizeSystemRun(registry: NodeRegistry, overrides: Partial<SystemRun
   });
 }
 
+function computerUseDescriptor() {
+  return {
+    contractVersion: 2 as const,
+    provider: { id: "fixture", label: "Fixture", generation: "generation-1" },
+    actions: ["screenshot", "left_click"] as const,
+    targets: ["screen"] as const,
+    deliveryModes: ["foreground"] as const,
+    observations: ["image"] as const,
+    features: { recording: false, agentCursor: false, multiDisplay: false },
+  };
+}
+
 describe("gateway/node-registry", () => {
   it("retains the validated Computer Use declaration on the live session", () => {
     const registry = createNodeRegistry();
-    const computerUse = {
-      contractVersion: 2,
-      provider: { id: "fixture", label: "Fixture", generation: "generation-1" },
-      actions: ["screenshot", "left_click"],
-      targets: ["screen"],
-      deliveryModes: ["foreground"],
-      observations: ["image"],
-      features: { recording: false, agentCursor: false, multiDisplay: false },
-    };
+    const computerUse = computerUseDescriptor();
     const client = makeClient("conn-computer", "node-computer", [], {
       commands: ["screen.snapshot", "computer.act"],
       computerUse,
@@ -2751,11 +2757,13 @@ describe("gateway/node-registry", () => {
 
   it("refreshes effective live surface within the declared surface", () => {
     const registry = createTestNodeRegistry();
+    const computerUse = computerUseDescriptor();
     const client = makeClient("conn-1", "node-1", [], {
       caps: [],
       commands: [],
       declaredCaps: ["talk"],
-      declaredCommands: ["talk.ptt.start"],
+      declaredCommands: ["talk.ptt.start", "computer.act", "screen.snapshot"],
+      declaredComputerUse: computerUse,
       declaredPermissions: { microphone: true, camera: false },
     });
 
@@ -2765,15 +2773,21 @@ describe("gateway/node-registry", () => {
 
     const updated = registry.updateSurface("node-1", {
       caps: ["talk", "screen"],
-      commands: ["talk.ptt.start", "system.run"],
+      commands: ["talk.ptt.start", "computer.act", "screen.snapshot", "system.run"],
       permissions: { microphone: true, camera: true },
     });
 
     expect(updated?.caps).toEqual(["talk"]);
-    expect(updated?.commands).toEqual(["talk.ptt.start"]);
+    expect(updated?.commands).toEqual(["talk.ptt.start", "computer.act", "screen.snapshot"]);
+    expect(updated?.computerUse).toEqual(computerUse);
     expect(updated?.permissions).toEqual({ microphone: true, camera: false });
     expect(client.connect.caps).toEqual(["talk"]);
-    expect((client.connect as { commands?: string[] }).commands).toEqual(["talk.ptt.start"]);
+    expect((client.connect as { commands?: string[] }).commands).toEqual([
+      "talk.ptt.start",
+      "computer.act",
+      "screen.snapshot",
+    ]);
+    expect(client.connect.computerUse).toEqual(computerUse);
   });
 
   it("advances the exact live session with its approved surface generation", () => {
diff --git a/src/gateway/node-registry.ts b/src/gateway/node-registry.ts
index 4271ffcd0f66..a14ae73e9203 100644
--- a/src/gateway/node-registry.ts
+++ b/src/gateway/node-registry.ts
@@ -22,6 +22,7 @@ import {
   parseComputerUseCapabilityDescriptor,
   type ComputerUseCapabilityDescriptor,
 } from "../plugins/computer-use-contract.js";
+import { resolveEffectiveComputerUseDescriptor } from "./node-computer-use-descriptor.js";
 import {
   createRegisteredNodePluginToolDescriptorMap,
   normalizeNodePluginToolDescriptors,
@@ -73,6 +74,7 @@ export type NodeSession = {
   declaredCommands: string[];
   sessionCommandsCeiling?: string[];
   commands: string[];
+  declaredComputerUse?: ComputerUseCapabilityDescriptor;
   computerUse?: ComputerUseCapabilityDescriptor;
   /** Exact node-local build admitted for worker session hosting. */
   workerRuns?: WorkerAdmissionHandshake;
@@ -467,6 +469,12 @@ export class NodeRegistry {
       connect.computerUse === undefined
         ? undefined
         : parseComputerUseCapabilityDescriptor(connect.computerUse);
+    const declaredComputerUseValue = (connect as { declaredComputerUse?: unknown })
+      .declaredComputerUse;
+    const declaredComputerUse =
+      declaredComputerUseValue === undefined
+        ? computerUse
+        : parseComputerUseCapabilityDescriptor(declaredComputerUseValue);
     // Session ceilings preserve protocol compatibility across later pairing
     // approvals while declared* retains the durable approval surface.
     const sessionCapsCeiling = Array.isArray(
@@ -519,6 +527,7 @@ export class NodeRegistry {
       declaredCommands,
       sessionCommandsCeiling,
       commands,
+      ...(declaredComputerUse ? { declaredComputerUse } : {}),
       ...(computerUse ? { computerUse } : {}),
       ...(workerRuns ? { workerRuns } : {}),
       declaredNodePluginTools,
@@ -1004,6 +1013,12 @@ export class NodeRegistry {
     const nextCommands = surface.commands.filter((command) => sessionCommandsCeiling.has(command));
     node.commands = nextCommands;
     (node.client.connect as { commands?: string[] }).commands = nextCommands;
+    const nextComputerUse = resolveEffectiveComputerUseDescriptor({
+      commands: nextCommands,
+      declared: node.declaredComputerUse,
+    });
+    node.computerUse = nextComputerUse;
+    node.client.connect.computerUse = nextComputerUse;
     this.replaceEffectiveNodePluginTools(node);
 
     if ("caps" in surface) {
diff --git a/src/gateway/server/ws-connection/connect-node-session.ts b/src/gateway/server/ws-connection/connect-node-session.ts
index 1f847259b10c..aa73242f0c0f 100644
--- a/src/gateway/server/ws-connection/connect-node-session.ts
+++ b/src/gateway/server/ws-connection/connect-node-session.ts
@@ -9,10 +9,8 @@ import {
 import { getPairedDevice } from "../../../infra/device-pairing.js";
 import { AUTH_RATE_LIMIT_SCOPE_NODE_PAIRING } from "../../auth-rate-limit.js";
 import { ADMIN_SCOPE, PAIRING_SCOPE, WRITE_SCOPE } from "../../method-scopes.js";
-import {
-  reconcileNodePairingOnConnect,
-  resolveEffectiveComputerUseDescriptor,
-} from "../../node-connect-reconcile.js";
+import { resolveEffectiveComputerUseDescriptor } from "../../node-computer-use-descriptor.js";
+import { reconcileNodePairingOnConnect } from "../../node-connect-reconcile.js";
 import { filterLegacyNodeProtocolFeatures } from "../../node-legacy-protocol-filter.js";
 import { withSerializedRateLimitAttempt } from "../../rate-limit-attempt-serialization.js";
 import type {
@@ -185,12 +183,14 @@ export async function prepareGatewayNodeConnect(
   const nodeConnectParams = connectParams as ConnectParams & {
     declaredCaps?: string[];
     declaredCommands?: string[];
+    declaredComputerUse?: unknown;
     declaredPermissions?: Record<string, boolean>;
     sessionCapsCeiling?: string[];
     sessionCommandsCeiling?: string[];
   };
   nodeConnectParams.declaredCaps = reconciliation.declaredCaps;
   nodeConnectParams.declaredCommands = reconciliation.declaredCommands;
+  nodeConnectParams.declaredComputerUse = reconciliation.declaredComputerUse;
   nodeConnectParams.declaredPermissions = reconciliation.declaredPermissions;
   const pluginSurfaces = pluginNodeCapabilities.map((surface) => surface.surface);
   if (usesLegacyNodeProtocol) {
diff --git a/src/gateway/watch-node-http.ts b/src/gateway/watch-node-http.ts
index 8183c0485df2..6a36be896062 100644
--- a/src/gateway/watch-node-http.ts
+++ b/src/gateway/watch-node-http.ts
@@ -69,10 +69,8 @@ import {
 } from "./http-common.js";
 import { ADMIN_SCOPE, PAIRING_SCOPE, WRITE_SCOPE } from "./method-scopes.js";
 import { isLoopbackAddress, resolveRequestClientIp } from "./net.js";
-import {
-  reconcileNodePairingOnConnect,
-  resolveEffectiveComputerUseDescriptor,
-} from "./node-connect-reconcile.js";
+import { resolveEffectiveComputerUseDescriptor } from "./node-computer-use-descriptor.js";
+import { reconcileNodePairingOnConnect } from "./node-connect-reconcile.js";
 import type { NodeReapprovalCoordinator } from "./node-reapproval-coordinator.js";
 import type {
   NodeConnectivityResult,
@@ -872,10 +870,12 @@ export function createWatchNodeHttpRuntime(options: WatchNodeHttpRuntimeOptions)
       const registeredConnect = connect as ConnectParams & {
         declaredCaps?: string[];
         declaredCommands?: string[];
+        declaredComputerUse?: unknown;
         declaredPermissions?: Record<string, boolean>;
       };
       registeredConnect.declaredCaps = reconciliation.declaredCaps;
       registeredConnect.declaredCommands = reconciliation.declaredCommands;
+      registeredConnect.declaredComputerUse = reconciliation.declaredComputerUse;
       registeredConnect.declaredPermissions = reconciliation.declaredPermissions;
       registeredConnect.caps = reconciliation.effectiveCaps;
       registeredConnect.commands = reconciliation.effectiveCommands;
diff --git a/test/scripts/computer-use-live-rig.test.ts b/test/scripts/computer-use-live-rig.test.ts
new file mode 100644
index 000000000000..bd9656a6cf4d
--- /dev/null
+++ b/test/scripts/computer-use-live-rig.test.ts
@@ -0,0 +1,137 @@
+import { spawnSync } from "node:child_process";
+import { chmodSync, copyFileSync, mkdirSync, mkdtempSync, rmSync, writeFileSync } from "node:fs";
+import { createServer } from "node:net";
+import { tmpdir } from "node:os";
+import path from "node:path";
+import { afterEach, describe, expect, it } from "vitest";
+
+const rigScriptSource = path.resolve("scripts/dev/computer-use-macos-live-rig.sh");
+const fixtureRoots: string[] = [];
+
+function runGit(root: string, ...args: string[]): void {
+  const result = spawnSync("git", args, { cwd: root, encoding: "utf8" });
+  expect(result.status, result.stderr).toBe(0);
+}
+
+function writeExecutable(filePath: string, source: string): void {
+  writeFileSync(filePath, source);
+  chmodSync(filePath, 0o755);
+}
+
+function createRigRepository(): {
+  root: string;
+  script: string;
+  fakeBin: string;
+  app: string;
+  fixture: string;
+  proof: string;
+} {
+  const root = mkdtempSync(path.join(tmpdir(), "openclaw-computer-use-rig-"));
+  fixtureRoots.push(root);
+  const scriptsDev = path.join(root, "scripts", "dev");
+  const fakeBin = path.join(root, "fake-bin");
+  const app = path.join(root, "OpenClaw.app");
+  const appExecutable = path.join(app, "Contents", "MacOS", "OpenClaw");
+  mkdirSync(scriptsDev, { recursive: true });
+  mkdirSync(fakeBin);
+  mkdirSync(path.dirname(appExecutable), { recursive: true });
+
+  const script = path.join(scriptsDev, "computer-use-macos-live-rig.sh");
+  const fixture = path.join(scriptsDev, "computer-use-linux-x11-fixture.py");
+  const proof = path.join(scriptsDev, "computer-use-macos-live-proof.ts");
+  copyFileSync(rigScriptSource, script);
+  chmodSync(script, 0o755);
+  writeFileSync(fixture, "# committed fixture\n");
+  writeFileSync(proof, "// committed proof\n");
+  writeExecutable(appExecutable, "#!/bin/sh\nexit 0\n");
+  writeExecutable(path.join(fakeBin, "codesign"), "#!/bin/sh\nexit 0\n");
+  writeExecutable(path.join(fakeBin, "uname"), "#!/bin/sh\necho Linux\n");
+  writeExecutable(path.join(fakeBin, "xdotool"), "#!/bin/sh\nexit 0\n");
+  writeExecutable(path.join(fakeBin, "xdpyinfo"), "#!/bin/sh\nexit 0\n");
+
+  runGit(root, "init", "-q");
+  runGit(root, "config", "user.name", "OpenClaw Test");
+  runGit(root, "config", "user.email", "openclaw-test@example.com");
+  runGit(root, "add", "scripts");
+  runGit(root, "commit", "-q", "-m", "fixture");
+
+  return { root, script, fakeBin, app, fixture, proof };
+}
+
+async function reservePort(): Promise<number> {
+  const server = createServer();
+  await new Promise<void>((resolve, reject) => {
+    server.once("error", reject);
+    server.listen({ host: "127.0.0.1", port: 0 }, resolve);
+  });
+  const address = server.address();
+  const port = typeof address === "object" && address ? address.port : 0;
+  await new Promise<void>((resolve, reject) => {
+    server.close((error) => {
+      if (error) {
+        reject(error);
+        return;
+      }
+      resolve();
+    });
+  });
+  return port;
+}
+
+function runRig(params: { root: string; script: string; fakeBin: string; args: string[] }) {
+  return spawnSync("bash", [params.script, ...params.args], {
+    cwd: params.root,
+    encoding: "utf8",
+    env: {
+      ...process.env,
+      DISPLAY: ":99",
+      WAYLAND_DISPLAY: "",
+      XDG_SESSION_TYPE: "x11",
+      PATH: `${params.fakeBin}:${process.env.PATH ?? ""}`,
+    },
+  });
+}
+
+afterEach(() => {
+  for (const root of fixtureRoots.splice(0)) {
+    rmSync(root, { recursive: true, force: true });
+  }
+});
+
+describe("computer-use live rig source integrity", () => {
+  it("refuses macOS preparation after the proof runner changes", async () => {
+    const fixture = createRigRepository();
+    writeFileSync(fixture.proof, "// locally modified proof\n");
+    const result = runRig({
+      ...fixture,
+      args: [
+        "prepare",
+        "proof-test",
+        String(await reservePort()),
+        fixture.app,
+        path.join(fixture.root, "scratch-mac"),
+        "cua",
+      ],
+    });
+
+    expect(result.status).toBe(1);
+    expect(result.stderr).toContain("runtime sources are dirty");
+  });
+
+  it("refuses Linux preparation after the X11 fixture changes", async () => {
+    const fixture = createRigRepository();
+    writeFileSync(fixture.fixture, "# locally modified fixture\n");
+    const result = runRig({
+      ...fixture,
+      args: [
+        "prepare-linux",
+        "proof-test",
+        String(await reservePort()),
+        path.join(fixture.root, "scratch-linux"),
+      ],
+    });
+
+    expect(result.status).toBe(1);
+    expect(result.stderr).toContain("runtime sources are dirty");
+  });
+});