diff --git a/docs/reference/commands.mdx b/docs/reference/commands.mdx
index 614f37f56bf..9196a487472 100644
--- a/docs/reference/commands.mdx
+++ b/docs/reference/commands.mdx
@@ -1202,6 +1202,12 @@ $$nemoclaw my-assistant shields down --timeout 5m --reason "maintenance"
 | `shields up` | Lock the sandbox config and restore the saved restrictive policy |
 | `shields down` | Temporarily unlock the sandbox config. Supports `--timeout`, `--reason`, and `--policy` |
 
+If OpenShell rejects the permissive policy before it is applied, `shields down` returns an error and keeps the sandbox in the Shields up state.
+The command clears the provisional Shields down record and timer, and `shields status` remains `UP`.
+If that record cannot be cleared and NemoClaw writes the rejection marker, `shields status` derives `UP` from that marker.
+The auto-restore timer and transition remain the recovery authority.
+If the rejection marker also cannot be written, `shields status` reports the incomplete transition as an error.
+
 If `shields up` reports that the config remains unlocked or drifted, confirm that the sandbox is running and ready, then retry `$$nemoclaw <name> shields up`.
 If the retry still fails, rebuild a known-good baseline with `$$nemoclaw <name> rebuild --yes`.
 
diff --git a/src/lib/shields/index.ts b/src/lib/shields/index.ts
index 5d7fc5999d0..e65175ce17d 100644
--- a/src/lib/shields/index.ts
+++ b/src/lib/shields/index.ts
@@ -135,7 +135,7 @@ const HERMES_CONFIG_GUARD_TIMEOUT_MS = 11 * 60 * 1000;
 
 type ShieldsDownTransition = {
   version: 1;
-  phase: "preparing" | "active";
+  phase: "preparing" | "active" | "policy_rejected";
   ownerPid: number;
   ownerStartIdentity: string;
   processToken: string;
@@ -182,7 +182,9 @@ function isShieldsDownTransition(value: unknown): value is ShieldsDownTransition
   if (!isObjectRecord(value)) return false;
   return (
     value.version === 1 &&
-    (value.phase === "preparing" || value.phase === "active") &&
+    (value.phase === "preparing" ||
+      value.phase === "active" ||
+      value.phase === "policy_rejected") &&
     typeof value.ownerPid === "number" &&
     Number.isInteger(value.ownerPid) &&
     value.ownerPid > 0 &&
@@ -219,6 +221,13 @@ function readShieldsDownTransition(
   }
 }
 
+function readTimerBoundShieldsDownTransition(sandboxName: string): ShieldsDownTransition | null {
+  const marker = readTimerMarker(sandboxName);
+  if (!marker?.processToken || !/^[0-9a-f]{32}$/.test(marker.processToken)) return null;
+  const transition = readShieldsDownTransition(sandboxName, marker.processToken);
+  return transition?.snapshotPath === marker.snapshotPath ? transition : null;
+}
+
 function writeShieldsDownTransition(
   transition: ShieldsDownTransition,
   expectedPhase: ShieldsDownTransition["phase"] | null,
@@ -930,8 +939,27 @@ function getShieldsPostureWithoutHostLock(
   allowInlineRecovery = false,
 ): ShieldsPosture {
   const state = recoverExpiredAutoRestoreGate(sandboxName, allowInlineRecovery);
-  const mode = state._isCorrupt ? "error" : deriveShieldsMode(state, state._hasStateFile);
-  return { ...describeShieldsMode(mode), state };
+  const timerBoundTransition =
+    !state._isCorrupt && state.shieldsDown === true
+      ? readTimerBoundShieldsDownTransition(sandboxName)
+      : null;
+  const transitionDeniesMutability =
+    timerBoundTransition?.phase === "policy_rejected" ||
+    timerBoundTransition?.phase === "preparing";
+  const effectiveState: LoadedShieldsState = transitionDeniesMutability
+    ? {
+        ...state,
+        shieldsDown: false,
+        shieldsDownAt: null,
+        shieldsDownTimeout: null,
+        shieldsDownReason: null,
+        shieldsDownPolicy: null,
+      }
+    : state;
+  const mode = effectiveState._isCorrupt
+    ? "error"
+    : deriveShieldsMode(effectiveState, effectiveState._hasStateFile);
+  return { ...describeShieldsMode(mode), state: effectiveState };
 }
 
 type ExpiredAutoRestoreTakeover = {
@@ -2962,6 +2990,8 @@ interface ShieldsPolicySnapshotRestoreOptions {
   transitionProcessToken?: string;
   deadlineAuthoritative?: boolean;
   expiredTimerRecovery?: boolean;
+  buildPolicySet?: typeof buildPolicySetCommand;
+  runPolicySet?: typeof run;
 }
 
 type ShieldsPolicySnapshotRestoreResult = ReturnType<typeof run> & {
@@ -2973,6 +3003,8 @@ function applyShieldsPolicySnapshot(
   snapshotPath: string,
   options: ShieldsPolicySnapshotRestoreOptions = {},
 ): ShieldsPolicySnapshotRestoreResult {
+  const buildPolicySet = options.buildPolicySet ?? buildPolicySetCommand;
+  const runPolicySet = options.runPolicySet ?? run;
   const state = loadShieldsState(sandboxName);
   let transition: ShieldsDownTransition | null = null;
   if (options.transitionProcessToken !== undefined) {
@@ -3061,7 +3093,7 @@ function applyShieldsPolicySnapshot(
         fs.readFileSync(snapshotPath, "utf-8"),
         hasManagedMcpPolicyClaims(sandboxName),
       );
-      return run(buildPolicySetCommand(snapshotPath, sandboxName), {
+      return runPolicySet(buildPolicySet(snapshotPath, sandboxName), {
         ignoreError: true,
       });
     }
@@ -3087,7 +3119,7 @@ function applyShieldsPolicySnapshot(
   }
   const runtimePolicyIsTemp = runtimePolicyPath !== snapshotPath;
   try {
-    const result = run(buildPolicySetCommand(runtimePolicyPath, sandboxName), {
+    const result = runPolicySet(buildPolicySet(runtimePolicyPath, sandboxName), {
       ignoreError: true,
     });
     return managedMcpOmissions.length > 0 ? { ...result, managedMcpOmissions } : result;
@@ -3658,11 +3690,66 @@ function shieldsDownWithoutHostLock(sandboxName: string, opts: ShieldsDownOpts =
   }
 
   console.log(`  Applying ${policyName} policy...`);
+  let policySetResult: ReturnType<typeof run>;
   try {
-    run(buildPolicySetCommand(policyFile, sandboxName));
+    policySetResult = run(buildPolicySetCommand(policyFile, sandboxName), {
+      ignoreError: true,
+    });
   } finally {
     cleanupRuntimePolicyFile();
   }
+  if (policySetResult.status !== 0) {
+    // The permissive policy was rejected before it applied — for example,
+    // OpenShell refuses a live Landlock change on a sandbox whose policy is
+    // sealed at startup (Deep Agents). Nothing was weakened: configuration is
+    // still locked and the restrictive policy is unchanged. The provisional
+    // Shields down record written above therefore conflicts with the actual
+    // posture. Clear it, cancel the now-pointless timer and transition, and
+    // fail closed. Otherwise `shields status` would report `DOWN`/permissive
+    // for an unlock that never happened.
+    // See #8198.
+    try {
+      saveShieldsState(sandboxName, {
+        shieldsDown: false,
+        shieldsDownAt: null,
+        shieldsDownTimeout: null,
+        shieldsDownReason: null,
+        shieldsDownPolicy: null,
+        shieldsPolicySnapshotPath: null,
+      });
+    } catch (stateErr) {
+      // Clearing the provisional Shields down record failed, so on disk the
+      // record still says `DOWN`. Mark the retained transition as rejected so
+      // status derives the restrictive posture instead of treating the
+      // provisional record as a completed unlock. The timer and transition
+      // remain the recovery authority and reclaim the restrictive snapshot.
+      if (transition) {
+        try {
+          transition = { ...transition, phase: "policy_rejected" };
+          writeShieldsDownTransition(transition, "preparing");
+        } catch (transitionErr) {
+          const transitionMessage =
+            transitionErr instanceof Error ? transitionErr.message : String(transitionErr);
+          console.error(
+            `  The rejected Shields down transition could not be recorded: ${transitionMessage}`,
+          );
+        }
+      }
+      const stateMessage = stateErr instanceof Error ? stateErr.message : String(stateErr);
+      console.error(
+        `  ERROR: Could not apply the ${policyName} policy, and clearing the provisional Shields down record failed: ${stateMessage}`,
+      );
+      console.error("  The scheduled auto-restore remains authoritative.");
+      return failShieldsCommand(`Could not apply ${policyName} policy`, opts.throwOnError);
+    }
+    if (transition) clearShieldsDownTransition(sandboxName, transition.processToken);
+    killTimer(sandboxName);
+    console.error(
+      `  ERROR: Could not apply the ${policyName} policy; the sandbox remains in the Shields up state.`,
+    );
+    console.error("  Shields down did not take effect. `shields status` continues to report `UP`.");
+    return failShieldsCommand(`Could not apply ${policyName} policy`, opts.throwOnError);
+  }
 
   // 2b. Return config to default mutable state.
   //     OpenClaw uses sandbox:sandbox 0660/2770 here so the gateway UID, which
@@ -4122,6 +4209,13 @@ function shieldsStatusWithoutHostLock(
     throw new DeferredShieldsExit("Shields state is corrupt", 1);
   }
 
+  const transition = readTimerBoundShieldsDownTransition(sandboxName);
+  if (transition?.phase === "preparing") {
+    console.error("  Shields: ERROR (Shields down transition incomplete)");
+    console.error("  The scheduled auto-restore remains authoritative.");
+    throw new DeferredShieldsExit("Shields down transition is incomplete", 1);
+  }
+
   switch (posture.mode) {
     case "mutable_default":
       // NC-2227-02: Fresh sandbox with no shields history — do NOT claim locked
@@ -4260,12 +4354,8 @@ function shieldsStatus(
  * "not configured" instead of "down".
  */
 function isShieldsDown(sandboxName: string, allowInlineRecovery = false): boolean {
-  const state = allowInlineRecovery
-    ? getShieldsPosture(sandboxName, true).state
-    : recoverExpiredAutoRestoreGate(sandboxName, false);
-  if (state._isCorrupt) return false;
-  const mode = deriveShieldsMode(state, state._hasStateFile);
-  return mode !== "locked";
+  const posture = getShieldsPosture(sandboxName, allowInlineRecovery);
+  return posture.mode !== "error" && posture.mode !== "locked";
 }
 
 /**
diff --git a/src/lib/shields/policy-transition.test.ts b/src/lib/shields/policy-transition.test.ts
index 81c95c845f8..a0f6eadbbb6 100644
--- a/src/lib/shields/policy-transition.test.ts
+++ b/src/lib/shields/policy-transition.test.ts
@@ -101,6 +101,184 @@ describe("shields policy transition", () => {
   });
 });
 
+describe("shields down policy rejection", () => {
+  let tmpDir: string;
+
+  beforeEach(() => {
+    tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), "shields-policy-rejection-"));
+    vi.stubEnv("HOME", tmpDir);
+  });
+
+  afterEach(() => {
+    vi.restoreAllMocks();
+    vi.unstubAllEnvs();
+    fs.rmSync(tmpDir, { recursive: true, force: true });
+  });
+
+  function createRejectedPolicyHarness() {
+    return createShieldsFlowHarness(requireSource, tmpDir, {
+      run: (cmd) => ({
+        status: Array.isArray(cmd) && cmd.includes("policy") && cmd.includes("set") ? 1 : 0,
+      }),
+    });
+  }
+
+  it("keeps `shields status` at `UP` when OpenShell rejects the permissive policy (#8198)", () => {
+    const harness = createRejectedPolicyHarness();
+
+    expect(() =>
+      harness.shieldsDown("openclaw", {
+        reason: "verify",
+        skipTimer: true,
+        throwOnError: true,
+      }),
+    ).toThrow(/Could not apply/);
+    expect(harness.isShieldsDown("openclaw")).toBe(false);
+
+    const state = JSON.parse(
+      fs.readFileSync(path.join(tmpDir, ".nemoclaw/state/shields-openclaw.json"), "utf-8"),
+    );
+    expect(state).toMatchObject({ shieldsDown: false, shieldsDownAt: null });
+  });
+
+  it("retains auto-restore authority when rejected policy state cleanup fails (#8198)", () => {
+    const stateDir = path.join(tmpDir, ".nemoclaw", "state");
+    const statePath = path.join(stateDir, "shields-openclaw.json");
+    fs.mkdirSync(stateDir, { recursive: true });
+    fs.writeFileSync(
+      statePath,
+      JSON.stringify({
+        shieldsDown: false,
+        fileHashes: { "/sandbox/.openclaw/openclaw.json": "a".repeat(64) },
+        updatedAt: "2026-08-05T00:00:00.000Z",
+      }),
+    );
+    const timerKill = vi.fn(() => true);
+    const harness = createShieldsFlowHarness(requireSource, tmpDir, {
+      failPolicyRejectionStateClear: true,
+      initialOpenClawPosture: "locked",
+      processStartIdentity: "test-process-start-identity",
+      fork: () => ({
+        pid: 4242,
+        disconnect: vi.fn(),
+        unref: vi.fn(),
+        send: vi.fn(() => true),
+        kill: timerKill,
+      }),
+      run: (cmd) => ({
+        status: Array.isArray(cmd) && cmd.includes("policy") && cmd.includes("set") ? 1 : 0,
+      }),
+    });
+    expect(() =>
+      harness.shieldsDown("openclaw", {
+        reason: "verify recovery authority",
+        throwOnError: true,
+      }),
+    ).toThrow(/Could not apply/);
+
+    expect(JSON.parse(fs.readFileSync(statePath, "utf-8"))).toMatchObject({
+      shieldsDown: true,
+      shieldsDownReason: "verify recovery authority",
+    });
+    expect(fs.existsSync(path.join(stateDir, "shields-timer-openclaw.json"))).toBe(true);
+    expect(
+      fs.readdirSync(stateDir).some((name) => name.startsWith("shields-transition-openclaw-")),
+    ).toBe(true);
+    const transitionName = fs
+      .readdirSync(stateDir)
+      .find((name) => name.startsWith("shields-transition-openclaw-"));
+    expect(
+      JSON.parse(fs.readFileSync(path.join(stateDir, transitionName!), "utf-8")),
+    ).toMatchObject({ phase: "policy_rejected" });
+    expect(timerKill).not.toHaveBeenCalled();
+    expect(harness.errorSpy.mock.calls.flat().join("\n")).toContain(
+      "The scheduled auto-restore remains authoritative.",
+    );
+
+    harness.logSpy.mockClear();
+    harness.errorSpy.mockClear();
+    harness.shieldsStatus("openclaw", true, {
+      verifyLockState: () => ({ ok: true, issues: [] }),
+      resolveConfig: () => ({
+        agentName: "openclaw",
+        configPath: "/sandbox/.openclaw/openclaw.json",
+        configDir: "/sandbox/.openclaw",
+      }),
+    });
+
+    expect(harness.isShieldsDown("openclaw")).toBe(false);
+    expect(harness.logSpy).toHaveBeenCalledWith("  Shields: UP (lockdown active)");
+    expect(harness.logSpy.mock.calls.flat().join("\n")).not.toMatch(/DOWN|permissive|unlocked/);
+  });
+
+  it("denies mutations when rejected policy state and transition updates both fail (#8198)", () => {
+    const stateDir = path.join(tmpDir, ".nemoclaw", "state");
+    const statePath = path.join(stateDir, "shields-openclaw.json");
+    fs.mkdirSync(stateDir, { recursive: true });
+    fs.writeFileSync(
+      statePath,
+      JSON.stringify({
+        shieldsDown: false,
+        fileHashes: { "/sandbox/.openclaw/openclaw.json": "a".repeat(64) },
+        updatedAt: "2026-08-05T00:00:00.000Z",
+      }),
+    );
+    const harness = createShieldsFlowHarness(requireSource, tmpDir, {
+      failPolicyRejectionStateClear: true,
+      failPolicyRejectionTransitionWrite: true,
+      initialOpenClawPosture: "locked",
+      processStartIdentity: "test-process-start-identity",
+      fork: () => ({
+        pid: 4242,
+        disconnect: vi.fn(),
+        unref: vi.fn(),
+        send: vi.fn(() => true),
+        kill: vi.fn(() => true),
+      }),
+      run: (cmd) => ({
+        status: Array.isArray(cmd) && cmd.includes("policy") && cmd.includes("set") ? 1 : 0,
+      }),
+    });
+
+    expect(() =>
+      harness.shieldsDown("openclaw", {
+        reason: "verify incomplete rejection",
+        throwOnError: true,
+      }),
+    ).toThrow(/Could not apply/);
+
+    const transitionName = fs
+      .readdirSync(stateDir)
+      .find((name) => name.startsWith("shields-transition-openclaw-"));
+    expect(
+      JSON.parse(fs.readFileSync(path.join(stateDir, transitionName!), "utf-8")),
+    ).toMatchObject({ phase: "preparing" });
+    expect(harness.getShieldsPosture("openclaw", false)).toMatchObject({
+      locked: true,
+      mutable: false,
+    });
+    expect(harness.isShieldsDown("openclaw")).toBe(false);
+
+    const exitSpy = vi.spyOn(process, "exit").mockImplementation(((code?: number) => {
+      throw new Error(`process exit ${String(code)}`);
+    }) as typeof process.exit);
+    expect(() =>
+      harness.shieldsStatus("openclaw", true, {
+        verifyLockState: () => ({ ok: true, issues: [] }),
+        resolveConfig: () => ({
+          agentName: "openclaw",
+          configPath: "/sandbox/.openclaw/openclaw.json",
+          configDir: "/sandbox/.openclaw",
+        }),
+      }),
+    ).toThrow("process exit 1");
+    expect(exitSpy).toHaveBeenCalledWith(1);
+    expect(harness.errorSpy.mock.calls.flat().join("\n")).toContain(
+      "Shields: ERROR (Shields down transition incomplete)",
+    );
+  });
+});
+
 describe("shields config lock without a shipped config hash", () => {
   const CONFIG_DIR = "/sandbox/.deepagents";
   const CONFIG_PATH = `${CONFIG_DIR}/config.toml`;
diff --git a/test/helpers/shields-flow-harness.ts b/test/helpers/shields-flow-harness.ts
index cf4f83792ff..9721ca324ff 100644
--- a/test/helpers/shields-flow-harness.ts
+++ b/test/helpers/shields-flow-harness.ts
@@ -16,6 +16,7 @@ export type ShieldsFlowHarness = {
   auditSpy: MockInstance;
   cleanupTempDirSpy: MockInstance;
   errorSpy: MockInstance;
+  getShieldsPosture: typeof import("../../src/lib/shields/index.js").getShieldsPosture;
   getOpenClawPosture: () => "locked" | "mutable";
   logSpy: MockInstance;
   policySetBodies: string[];
@@ -34,6 +35,8 @@ export type ShieldsFlowHarnessOptions = {
   directSandboxUnavailable?: boolean;
   dockerExecFileSync?: (argv: unknown) => string;
   failOpenClawGuardActions?: Array<"lock" | "unlock">;
+  failPolicyRejectionStateClear?: boolean;
+  failPolicyRejectionTransitionWrite?: boolean;
   failStateSave?: boolean;
   initialOpenClawPosture?: "locked" | "mutable";
   invokedAs?: "nemoclaw" | "nemohermes";
@@ -47,6 +50,7 @@ export type ShieldsFlowHarnessOptions = {
     path: string;
     detail: string;
   }>;
+  processStartIdentity?: string;
   fork?: (...args: unknown[]) => {
     pid: number;
     disconnect: () => void;
@@ -124,6 +128,14 @@ export function createShieldsFlowHarness(
   delete require.cache[requireDist.resolve("../actions/sandbox/mcp-bridge-policy.js")];
   delete require.cache[requireDist.resolve("../sandbox/privileged-exec.js")];
   delete require.cache[requireDist.resolve("../cli/branding.js")];
+  const timerControl = requireDist(
+    "./timer-control.js",
+  ) as typeof import("../../src/lib/shields/timer-control.js");
+  if (options.processStartIdentity !== undefined) {
+    vi.spyOn(timerControl, "readProcessStartIdentity").mockReturnValue(
+      options.processStartIdentity,
+    );
+  }
   const lifecycleLock = requireDist(
     "../state/mcp-lifecycle-lock.js",
   ) as typeof import("../../src/lib/state/mcp-lifecycle-lock.js");
@@ -143,7 +155,6 @@ export function createShieldsFlowHarness(
   const privilegedExec = requireDist("../sandbox/privileged-exec.js");
   const dockerExec = requireDist("../adapters/docker/exec.js");
   const audit = requireDist("./audit.js");
-  const timerControl = requireDist("./timer-control.js");
   const tempFiles = requireDist("../onboard/temp-files.js");
   const childProcess = requireDist("node:child_process");
   const policySetBodies: string[] = [];
@@ -311,6 +322,35 @@ export function createShieldsFlowHarness(
     },
   );
 
+  if (options.failPolicyRejectionStateClear) {
+    const statePath = path.join(tmpDir, ".nemoclaw", "state", "shields-openclaw.json");
+    const originalWriteFileSync = fs.writeFileSync.bind(fs);
+    let stateWrites = 0;
+    vi.spyOn(fs, "writeFileSync").mockImplementation(((file, data, writeOptions) => {
+      if (String(file) === statePath && ++stateWrites === 2) {
+        throw new Error("state cleanup denied");
+      }
+      return originalWriteFileSync(file, data, writeOptions);
+    }) as typeof fs.writeFileSync);
+  }
+
+  if (options.failPolicyRejectionTransitionWrite) {
+    const transitionPrefix = path.join(
+      tmpDir,
+      ".nemoclaw",
+      "state",
+      "shields-transition-openclaw-",
+    );
+    const originalRenameSync = fs.renameSync.bind(fs);
+    let transitionWrites = 0;
+    vi.spyOn(fs, "renameSync").mockImplementation((oldPath, newPath) => {
+      if (String(newPath).startsWith(transitionPrefix) && ++transitionWrites === 2) {
+        throw new Error("transition update denied");
+      }
+      return originalRenameSync(oldPath, newPath);
+    });
+  }
+
   const shields = requireDist(shieldsModulePath);
   logSpy.mockClear();
   errorSpy.mockClear();
@@ -321,6 +361,7 @@ export function createShieldsFlowHarness(
     auditSpy,
     cleanupTempDirSpy,
     errorSpy,
+    getShieldsPosture: shields.getShieldsPosture,
     getOpenClawPosture: () => openClawPosture,
     logSpy,
     policySetBodies,