diff --git a/apps/mobile/src/features/threads/ThreadFeed.tsx b/apps/mobile/src/features/threads/ThreadFeed.tsx
index 58191639331a..221782f4cd26 100644
--- a/apps/mobile/src/features/threads/ThreadFeed.tsx
+++ b/apps/mobile/src/features/threads/ThreadFeed.tsx
@@ -1619,6 +1619,7 @@ function renderFeedEntry(
         environmentId={props.environmentId}
         projectedItem={entry.activities[0]!.projectedItem}
         iconColor={iconSubtleColor}
+        surfaceColor={props.screenColor}
       />
     );
   }
diff --git a/apps/mobile/src/features/threads/thread-handoff-row.tsx b/apps/mobile/src/features/threads/thread-handoff-row.tsx
index 3b1b2894a8fc..1af6c1ec0099 100644
--- a/apps/mobile/src/features/threads/thread-handoff-row.tsx
+++ b/apps/mobile/src/features/threads/thread-handoff-row.tsx
@@ -1,9 +1,14 @@
 import { useAtomValue } from "@effect/atom-react";
 import { scopeThreadRef } from "@t3tools/client-runtime/environment";
 import { resolveHandoffEndpoints } from "@t3tools/client-runtime/handoff";
-import { resolveProviderInstanceDisplayName } from "@t3tools/client-runtime/state/provider-instance-display";
+import {
+  normalizeProviderAccentColor,
+  resolveProviderInstanceDisplayName,
+  shouldShowInstanceBadge,
+} from "@t3tools/client-runtime/state/provider-instance-display";
 import type {
   EnvironmentId,
+  ProviderInstanceConfig,
   OrchestrationV2ProjectedTurnItem,
   ProviderInstanceId,
   ServerProvider,
@@ -13,7 +18,7 @@ import { Fragment, useMemo } from "react";
 import { Alert, Pressable, View, type ColorValue } from "react-native";
 import { AppText as Text } from "../../components/AppText";
 import { SymbolView } from "../../components/AppSymbol";
-import { ProviderIcon } from "../../components/ProviderIcon";
+import { ProviderIcon, ProviderInstanceIcon } from "../../components/ProviderIcon";
 import { environmentThreadDetails } from "../../state/threads";
 import { serverEnvironment } from "../../state/server";
 import { ThreadContextDivider } from "./thread-context-divider";
@@ -38,6 +43,7 @@ export function ThreadHandoffRow(props: {
   environmentId: EnvironmentId;
   projectedItem: OrchestrationV2ProjectedTurnItem;
   iconColor: ColorValue;
+  surfaceColor: string;
 }) {
   const { item } = props.projectedItem;
   const endpointsAtom = useMemo(
@@ -48,6 +54,11 @@ export function ThreadHandoffRow(props: {
   const config = useAtomValue(serverEnvironment.configValueAtom(props.environmentId));
   if (item.type !== "handoff" || endpoints === null) return null;
   const color = item.status === "failed" ? "#e11d48" : props.iconColor;
+  const endpointProps = {
+    providers: config?.providers ?? [],
+    providerInstances: config?.settings.providerInstances,
+    surfaceColor: props.surfaceColor,
+  };
   return (
     <ThreadContextDivider
       label="Context handoff"
@@ -63,13 +74,13 @@ export function ThreadHandoffRow(props: {
                 ,
               </Text>
             ) : null}
-            <HandoffEndpoint {...endpoint} providers={config?.providers ?? []} />
+            <HandoffEndpoint {...endpoint} {...endpointProps} />
           </Fragment>
         ))}
         {endpoints.from.length > 0 ? (
           <SymbolView name="arrow.right" size={12} tintColor={color} />
         ) : null}
-        <HandoffEndpoint {...endpoints.to} providers={config?.providers ?? []} />
+        <HandoffEndpoint {...endpoints.to} {...endpointProps} />
       </View>
     </ThreadContextDivider>
   );
@@ -79,6 +90,8 @@ function HandoffEndpoint(props: {
   instanceId: ProviderInstanceId;
   model?: string | undefined;
   providers: ReadonlyArray<ServerProvider>;
+  providerInstances: Readonly<Record<string, ProviderInstanceConfig>> | undefined;
+  surfaceColor: string;
 }) {
   const provider = props.providers.find((candidate) => candidate.instanceId === props.instanceId);
   const model = provider?.models.find((candidate) => candidate.slug === props.model);
@@ -87,12 +100,36 @@ function HandoffEndpoint(props: {
     model?.name ??
     props.model ??
     (provider ? resolveProviderInstanceDisplayName(provider) : props.instanceId);
+  const accentColor = normalizeProviderAccentColor(provider?.accentColor);
+  // Same account badge as the thread rows: a handoff between two accounts of
+  // one provider would otherwise show the same glyph on both sides. Settings
+  // carry each ACP instance's agent, which tells its glyph apart.
+  const badgeEntry = (candidate: ServerProvider) => {
+    const config = props.providerInstances?.[candidate.instanceId]?.config;
+    // A local ACP command has no registry agent, as on web.
+    const agentId =
+      typeof config === "object" && config && Reflect.get(config, "source") !== "local"
+        ? Reflect.get(config, "agentId")
+        : null;
+    return {
+      driverKind: candidate.driver,
+      ...(typeof agentId === "string" && agentId.trim()
+        ? { acpRegistryAgentId: agentId.trim() }
+        : {}),
+    };
+  };
+  const showBadge =
+    provider !== undefined &&
+    shouldShowInstanceBadge(
+      { ...badgeEntry(provider), accentColor },
+      props.providers.map(badgeEntry),
+    );
   return (
     <Pressable
       accessibilityRole="button"
       accessibilityLabel={label}
       accessibilityHint="Show provider account"
-      className="min-h-6 max-w-full flex-row items-center justify-center gap-1"
+      className="min-h-6 max-w-full flex-row items-center justify-center gap-1.5"
       hitSlop={{ top: 8, bottom: 8 }}
       onPress={() =>
         Alert.alert(
@@ -101,11 +138,23 @@ function HandoffEndpoint(props: {
         )
       }
     >
-      <ProviderIcon
-        provider={provider?.driver ?? props.instanceId}
-        iconUrl={provider?.iconUrl}
-        size={12}
-      />
+      {showBadge && provider !== undefined ? (
+        <ProviderInstanceIcon
+          provider={provider.driver}
+          iconUrl={provider.iconUrl}
+          size={14}
+          displayName={resolveProviderInstanceDisplayName(provider)}
+          accentColor={accentColor}
+          showBadge
+          surfaceColor={props.surfaceColor}
+        />
+      ) : (
+        <ProviderIcon
+          provider={provider?.driver ?? props.instanceId}
+          iconUrl={provider?.iconUrl}
+          size={12}
+        />
+      )}
       <Text numberOfLines={1} className="shrink text-xs text-foreground-muted">
         {label}
       </Text>
diff --git a/apps/web/src/components/chat/V2LifecycleRow.tsx b/apps/web/src/components/chat/V2LifecycleRow.tsx
index cdd469f7acb4..ee3d2add3b83 100644
--- a/apps/web/src/components/chat/V2LifecycleRow.tsx
+++ b/apps/web/src/components/chat/V2LifecycleRow.tsx
@@ -37,7 +37,12 @@ import {
 } from "lucide-react";
 
 import { Tooltip, TooltipTrigger, TooltipPopup } from "../ui/tooltip";
-import { getProviderInstanceEntry } from "../../providerInstances";
+import {
+  applyProviderInstanceSettings,
+  deriveProviderInstanceEntries,
+  shouldShowInstanceBadge,
+} from "../../providerInstances";
+import { useEnvironmentSettings } from "../../hooks/useSettings";
 import { formatShortTimestamp } from "../../timestampFormat";
 import { getTriggerDisplayModelName } from "./providerIconUtils";
 import { ProviderInstanceIcon, providerTextColorClassName } from "./ProviderInstanceIcon";
@@ -137,6 +142,7 @@ export function V2LifecycleRow(props: {
                   </span>
                 ) : null}
                 <HandoffEndpoint
+                  environmentId={props.environmentId}
                   providers={props.providerStatuses}
                   instanceId={endpoint.instanceId}
                   model={endpoint.model}
@@ -147,6 +153,7 @@ export function V2LifecycleRow(props: {
               <ArrowRightIcon aria-hidden="true" className="size-3 shrink-0" />
             ) : null}
             <HandoffEndpoint
+              environmentId={props.environmentId}
               providers={props.providerStatuses}
               instanceId={item.toProviderInstanceId}
               model={to.model}
@@ -556,11 +563,20 @@ function SubagentTimelineTooltip(
 }
 
 function HandoffEndpoint(props: {
+  readonly environmentId: EnvironmentId;
   readonly providers: ReadonlyArray<ServerProvider>;
   readonly instanceId: ProviderInstanceId;
   readonly model?: string | undefined;
 }) {
-  const entry = getProviderInstanceEntry(props.providers, props.instanceId);
+  // Settings carry each ACP instance's agent, which tells its glyph apart.
+  const entries = applyProviderInstanceSettings(
+    deriveProviderInstanceEntries(props.providers),
+    useEnvironmentSettings(props.environmentId),
+  );
+  const entry = entries.find((candidate) => candidate.instanceId === props.instanceId);
+  // Same account badge as the sidebar: a handoff between two accounts of one
+  // provider would otherwise show the same glyph on both sides.
+  const showBadge = entry !== undefined && shouldShowInstanceBadge(entry, entries);
   const model = props.model?.trim();
   const providerModel =
     model === undefined || model.length === 0
@@ -578,14 +594,19 @@ function HandoffEndpoint(props: {
         render={
           <span
             tabIndex={0}
-            className="inline-flex min-w-0 items-center gap-1 rounded-sm focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+            className="inline-flex min-w-0 items-center gap-1.5 rounded-sm focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
           >
             <ProviderInstanceIcon
               driverKind={entry?.driverKind ?? ProviderDriverKind.make(props.instanceId)}
               displayName={entry?.displayName ?? props.instanceId}
+              accentColor={entry?.accentColor}
               acpRegistryAgentId={entry?.acpRegistryAgentId}
               acpRegistryIconUrl={entry?.acpRegistryIconUrl}
-              iconClassName="size-3"
+              showBadge={showBadge}
+              // Glyph dims, badge stays saturated; sized like the sidebar row.
+              iconClassName={cn("size-3.5", showBadge && "opacity-60")}
+              badgeClassName="right-[-0.1875rem] bottom-[-0.1875rem] h-3 min-w-3 px-0.5 text-5xs"
+              indicatorBackground="var(--background)"
             />
             <span
               className={cn(
diff --git a/apps/web/src/providerInstances.ts b/apps/web/src/providerInstances.ts
index 60630c5f826b..ff5391e242e7 100644
--- a/apps/web/src/providerInstances.ts
+++ b/apps/web/src/providerInstances.ts
@@ -264,7 +264,7 @@ export function sortProviderInstanceEntries(
  * Look up a single instance entry by exact `instanceId`. Missing snapshots
  * are not inferred from driver kind in UI routing code.
  */
-export function getProviderInstanceEntry(
+function getProviderInstanceEntry(
   providers: ReadonlyArray<ServerProvider>,
   instanceId: ProviderInstanceId,
 ): ProviderInstanceEntry | undefined {