diff --git a/src/shared/session-method-scopes.ts b/src/shared/session-method-scopes.ts
index 3189c53f32ce..35ca9e177e9a 100644
--- a/src/shared/session-method-scopes.ts
+++ b/src/shared/session-method-scopes.ts
@@ -1,3 +1,4 @@
+import { isRecord } from "@openclaw/normalization-core/record-coerce";
 import { isIncognitoSessionKey } from "./incognito-session-key.js";
 
 export type SessionMutationOperatorScope = "operator.write" | "operator.admin";
@@ -21,10 +22,6 @@ const SESSIONS_DELETE_WRITE_SCOPE_FIELDS: ReadonlySet<string> = new Set([
   "archivedOnly",
 ]);
 
-function isRecord(value: unknown): value is Record<string, unknown> {
-  return Boolean(value && typeof value === "object" && !Array.isArray(value));
-}
-
 function resolveSessionsPatchRequiredScope(params: unknown): SessionMutationOperatorScope {
   if (!isRecord(params)) {
     // Malformed params cannot mutate anything; let the handler return the
diff --git a/ui/src/pages/chat/chat-pane-header.ts b/ui/src/pages/chat/chat-pane-header.ts
index edbb670ee089..abb0af76f4f4 100644
--- a/ui/src/pages/chat/chat-pane-header.ts
+++ b/ui/src/pages/chat/chat-pane-header.ts
@@ -102,12 +102,10 @@ export abstract class ChatPaneHeader extends ChatPaneContext {
         ? t("chat.sessionHeader.branchSwitchUnavailable")
         : null;
     const sharingSnapshot = this.context.gateway.snapshot;
-    const sharingMethodsSupported = [
-      "session.visibility.set",
-      "session.members.list",
-      "session.members.add",
-      "session.members.remove",
-    ].some((method) => isGatewayMethodAdvertised(sharingSnapshot, method) !== false);
+    // Sharing was introduced behind this advertised method. Keep the control
+    // hidden for older Gateways that omit method metadata.
+    const sharingMethodsSupported =
+      isGatewayMethodAdvertised(sharingSnapshot, "session.visibility.set") === true;
     const sharingReadAccess = readSessionMethodAccess(sharingSnapshot, {
       method: "session.members.list",
       requiredScope: "operator.read",
diff --git a/ui/src/pages/chat/chat-pane-session.ts b/ui/src/pages/chat/chat-pane-session.ts
index 6c80a6fac9c0..4a9440304509 100644
--- a/ui/src/pages/chat/chat-pane-session.ts
+++ b/ui/src/pages/chat/chat-pane-session.ts
@@ -310,15 +310,21 @@ export abstract class ChatPaneSession extends ChatPaneSharing {
       (row.status === "failed" || row.status === "timeout") &&
       (row.lastReadAt == null || failureAt > row.lastReadAt);
     const agentStatusActive = Boolean(row.agentStatus && row.agentStatus.expiresAt > Date.now());
-    if (
-      !this.unreadPatchGuard.shouldPatch(
-        state.sessionKey,
-        row.unread === true || unreadFailure || agentStatusActive,
-      )
-    ) {
+    const unread = row.unread === true || unreadFailure || agentStatusActive;
+    if (!unread) {
+      this.unreadPatchGuard.shouldPatch(state.sessionKey, false);
       return;
     }
     const agentId = parseAgentSessionKey(row.key)?.agentId ?? resolveChatAgentId(state);
+    const access = readSessionMethodAccess(this.context.gateway.snapshot, {
+      method: "sessions.patch",
+      params: { key: row.key, unread: false, agentId },
+    });
+    // Read-only navigation must remain silent: absence of mutation access is
+    // not an operation failure and should not latch the unread retry guard.
+    if (!access.allowed || !this.unreadPatchGuard.shouldPatch(state.sessionKey, true)) {
+      return;
+    }
     const guardKey = state.sessionKey;
     void this.context.sessions.patch(row.key, { unread: false }, { agentId }).catch(() => {
       // Unlatch so later unread snapshots retry; the session capability
diff --git a/ui/src/pages/chat/chat-pane.read-marker.test.ts b/ui/src/pages/chat/chat-pane.read-marker.test.ts
index 1048cbc287c8..08dd795f4840 100644
--- a/ui/src/pages/chat/chat-pane.read-marker.test.ts
+++ b/ui/src/pages/chat/chat-pane.read-marker.test.ts
@@ -2,6 +2,7 @@
 
 import { describe, expect, it, vi } from "vitest";
 import type { GatewayBrowserClient } from "../../api/gateway.ts";
+import type { ApplicationGatewaySnapshot } from "../../app/gateway.ts";
 import type { SessionCapability } from "../../lib/sessions/index.ts";
 import { createTestChatPane } from "./chat-pane.test-support.ts";
 
@@ -52,4 +53,40 @@ describe("chat pane read markers", () => {
       { agentId: "main" },
     );
   });
+
+  it.each([
+    {
+      name: "read-only scope",
+      methods: ["sessions.patch"],
+      scopes: ["operator.read"],
+    },
+    {
+      name: "unadvertised sessions.patch",
+      methods: ["sessions.create"],
+      scopes: ["operator.write"],
+    },
+  ])("does not mutate unread state with $name", ({ methods, scopes }) => {
+    const patch = vi.fn().mockResolvedValue(null);
+    const { pane, state } = createTestChatPane({
+      client: {} as GatewayBrowserClient,
+      sessions: { patch } as unknown as SessionCapability,
+    });
+    pane.context.gateway.snapshot.hello = {
+      auth: { role: "operator", scopes },
+      features: { methods },
+    } as ApplicationGatewaySnapshot["hello"];
+    const row = {
+      key: "agent:main:current",
+      kind: "direct" as const,
+      updatedAt: 20,
+      unread: true,
+    };
+
+    pane.markSessionRead(row);
+    pane.markSessionRead(row);
+
+    expect(patch).not.toHaveBeenCalled();
+    expect(state.chatError).toBeNull();
+    expect(state.lastError).toBeNull();
+  });
 });
diff --git a/ui/src/pages/chat/chat-pane.test-support.ts b/ui/src/pages/chat/chat-pane.test-support.ts
index b506b881c096..00ad322f4e92 100644
--- a/ui/src/pages/chat/chat-pane.test-support.ts
+++ b/ui/src/pages/chat/chat-pane.test-support.ts
@@ -108,7 +108,7 @@ export type TestChatPane = HTMLElement & {
   renderPaneHeader: (
     workspace: ReturnType<typeof createSessionWorkspaceProps>,
     tasks: ReturnType<typeof createBackgroundTasksProps>,
-    row: undefined,
+    row: GatewaySessionRow | undefined,
     catalog: boolean,
     agentWorkspace: undefined,
     workspaceGit: boolean,
diff --git a/ui/src/pages/chat/chat-pane.test.ts b/ui/src/pages/chat/chat-pane.test.ts
index 58d8d556ad61..aa5b14c82d6d 100644
--- a/ui/src/pages/chat/chat-pane.test.ts
+++ b/ui/src/pages/chat/chat-pane.test.ts
@@ -259,6 +259,38 @@ describe("chat pane header state", () => {
     expect(patch).not.toHaveBeenCalled();
   });
 
+  it("keeps sharing hidden when legacy Gateways omit method metadata", () => {
+    const { pane, state } = createTestChatPane({
+      client: {} as GatewayBrowserClient,
+      sessions: {} as SessionCapability,
+    });
+    pane.context.gateway.snapshot.hello = {
+      auth: { role: "operator", scopes: ["operator.write"] },
+    } as ApplicationContext["gateway"]["snapshot"]["hello"];
+    const session = {
+      key: "agent:main:current",
+      kind: "direct",
+      updatedAt: 0,
+      sharingRole: "owner",
+      visibility: "shared",
+    } satisfies GatewaySessionRow;
+    const container = document.createElement("div");
+
+    render(
+      pane.renderPaneHeader(
+        createSessionWorkspaceProps(state),
+        createBackgroundTasksProps(state, { onOpenSession: () => {} }),
+        session,
+        false,
+        undefined,
+        false,
+      ),
+      container,
+    );
+
+    expect(container.querySelector(".chat-pane__sharing-menu")).toBeNull();
+  });
+
   it("copies the resolved workspace path and branch", async () => {
     const { pane } = createTestChatPane({
       client: {} as GatewayBrowserClient,