diff --git a/ui/src/components/InlineEditor.tsx b/ui/src/components/InlineEditor.tsx
index 192e8260d8e..094566243a1 100644
--- a/ui/src/components/InlineEditor.tsx
+++ b/ui/src/components/InlineEditor.tsx
@@ -1,6 +1,6 @@
 import { useState, useRef, useEffect, useCallback } from "react";
 import { cn } from "../lib/utils";
-import { MarkdownBody } from "./MarkdownBody";
+import { MarkdownBody, type MarkdownExternalReferenceMap } from "./MarkdownBody";
 import { MarkdownEditor, type MarkdownEditorRef, type MentionOption } from "./MarkdownEditor";
 import { useAutosaveIndicator } from "../hooks/useAutosaveIndicator";
 import { FoldCurtain } from "./FoldCurtain";
@@ -19,6 +19,11 @@ interface InlineEditorProps {
   nullable?: boolean;
   /** When true, long display-mode markdown is clipped with a fade curtain that expands on click. */
   foldable?: boolean;
+  /**
+   * Optional host-resolved external object metadata. Forwarded to the read-mode
+   * `MarkdownBody` so resolved URLs render with the inline status icon prefix.
+   */
+  externalReferences?: MarkdownExternalReferenceMap;
 }
 
 /** Shared padding so display and edit modes occupy the exact same box. */
@@ -55,6 +60,7 @@ export function InlineEditor({
   onDropFile,
   mentions,
   foldable = false,
+  externalReferences,
 }: InlineEditorProps) {
   const [editing, setEditing] = useState(false);
   const [multilineEditing, setMultilineEditing] = useState(false);
@@ -288,12 +294,18 @@ export function InlineEditor({
         >
           {foldable ? (
             <FoldCurtain>
-              <MarkdownBody className={cn("paperclip-edit-in-place-content", className)}>
+              <MarkdownBody
+                className={cn("paperclip-edit-in-place-content", className)}
+                externalReferences={externalReferences}
+              >
                 {previewValue}
               </MarkdownBody>
             </FoldCurtain>
           ) : (
-            <MarkdownBody className={cn("paperclip-edit-in-place-content", className)}>
+            <MarkdownBody
+              className={cn("paperclip-edit-in-place-content", className)}
+              externalReferences={externalReferences}
+            >
               {previewValue}
             </MarkdownBody>
           )}
diff --git a/ui/src/components/IssueFiltersPopover.tsx b/ui/src/components/IssueFiltersPopover.tsx
index 19a844ad2c3..473689fb6d5 100644
--- a/ui/src/components/IssueFiltersPopover.tsx
+++ b/ui/src/components/IssueFiltersPopover.tsx
@@ -9,6 +9,8 @@ import { PriorityIcon } from "./PriorityIcon";
 import { StatusIcon } from "./StatusIcon";
 import {
   defaultIssueFilterState,
+  externalObjectFilterLabel,
+  externalObjectFilterOrder,
   issueFilterArraysEqual,
   issueFilterLabel,
   issuePriorityOrder,
@@ -17,6 +19,8 @@ import {
   toggleIssueFilterValue,
   type IssueFilterState,
 } from "../lib/issue-filters";
+import { externalObjectIconForCategory } from "../lib/external-objects";
+import { externalObjectStatusIcon } from "../lib/status-colors";
 import { formatAssigneeUserLabel } from "../lib/assignees";
 
 type AgentOption = {
@@ -344,6 +348,37 @@ export function IssueFiltersPopover({
                 </div>
               ) : null}
 
+              <div className="space-y-1">
+                <span className="text-xs text-muted-foreground">External object status</span>
+                <div className="space-y-0.5">
+                  {externalObjectFilterOrder.map((value) => {
+                    const iconCategory = value === "failed" ? "failed"
+                      : value === "waiting" ? "waiting"
+                      : value === "running" ? "running"
+                      : value === "auth_required" ? "auth_required"
+                      : value === "unreachable" ? "unreachable"
+                      : value === "stale" ? "unknown"
+                      : "closed";
+                    const Icon = externalObjectIconForCategory(iconCategory);
+                    const tone = externalObjectStatusIcon[iconCategory] ?? "";
+                    const textTone = tone.split(" ").filter((c) => c.startsWith("text-")).join(" ");
+                    return (
+                      <label
+                        key={value}
+                        className="flex cursor-pointer items-center gap-2 rounded-sm px-2 py-1 hover:bg-accent/50"
+                      >
+                        <Checkbox
+                          checked={state.externalObjectStatuses.includes(value)}
+                          onCheckedChange={() => onChange({ externalObjectStatuses: toggleIssueFilterValue(state.externalObjectStatuses, value) })}
+                        />
+                        <Icon className={`h-3.5 w-3.5 shrink-0 ${textTone}`} aria-hidden="true" />
+                        <span className="text-sm">{externalObjectFilterLabel(value)}</span>
+                      </label>
+                    );
+                  })}
+                </div>
+              </div>
+
               <div className="space-y-1">
                 <span className="text-xs text-muted-foreground">Visibility</span>
                 <label className="flex cursor-pointer items-center gap-2 rounded-sm px-2 py-1 hover:bg-accent/50">
diff --git a/ui/src/components/IssueProperties.tsx b/ui/src/components/IssueProperties.tsx
index dadb31e7e8c..c4de23bf8a4 100644
--- a/ui/src/components/IssueProperties.tsx
+++ b/ui/src/components/IssueProperties.tsx
@@ -35,6 +35,9 @@ import { PriorityIcon } from "./PriorityIcon";
 import { Identity } from "./Identity";
 import { IssueReferencePill } from "./IssueReferencePill";
 import { formatDate, formatDateTime, cn, projectUrl } from "../lib/utils";
+import { ExternalObjectPill } from "./ExternalObjectPill";
+import type { IssueExternalObjectGroup } from "../hooks/useIssueExternalObjects";
+import { externalObjectToneSeverity } from "../lib/external-objects";
 import { timeAgo } from "../lib/timeAgo";
 import { Button } from "@/components/ui/button";
 import { ToggleSwitch } from "@/components/ui/toggle-switch";
@@ -153,6 +156,10 @@ interface IssuePropertiesProps {
   /** Whether an agent run is currently in flight on this issue, so the assignee
    * picker can warn that reassigning will interrupt it. */
   hasActiveRun?: boolean;
+  externalObjects?: IssueExternalObjectGroup[];
+  externalObjectsLoading?: boolean;
+  externalObjectsError?: boolean;
+  onRetryExternalObjects?: () => void;
 }
 
 const ISSUE_BLOCKER_SEARCH_LIMIT = 50;
@@ -414,6 +421,10 @@ export function IssueProperties({
   onUpdate,
   inline,
   hasActiveRun = false,
+  externalObjects,
+  externalObjectsLoading,
+  externalObjectsError,
+  onRetryExternalObjects,
 }: IssuePropertiesProps) {
   const { selectedCompanyId } = useCompany();
   const queryClient = useQueryClient();
@@ -2168,6 +2179,49 @@ export function IssueProperties({
           {projectContent}
         </PropertyPicker>
 
+        {externalObjectsError ? (
+          <PropertyRow label="External objects">
+            <span className="text-xs text-muted-foreground">
+              Couldn't load external objects.
+              {onRetryExternalObjects ? (
+                <>
+                  {" "}
+                  <button
+                    type="button"
+                    className="text-primary underline-offset-2 hover:underline"
+                    onClick={onRetryExternalObjects}
+                  >
+                    Retry
+                  </button>
+                </>
+              ) : null}
+            </span>
+          </PropertyRow>
+        ) : externalObjectsLoading ? (
+          <PropertyRow label="External objects">
+            <span className="h-4 w-24 animate-pulse rounded bg-muted/40" />
+          </PropertyRow>
+        ) : externalObjects && externalObjects.length > 0 ? (
+          <PropertyRow label="External objects">
+            <div className="flex flex-wrap items-center gap-1.5">
+              {[...externalObjects]
+                .sort((a, b) => {
+                  const aTone = externalObjectToneSeverity(a.group.object?.statusTone);
+                  const bTone = externalObjectToneSeverity(b.group.object?.statusTone);
+                  return bTone - aTone;
+                })
+                .map(({ pill, mentionCount, sourceLabels, group }) => (
+                  <ExternalObjectPill
+                    key={group.object?.id ?? `${pill.providerKey}:${pill.objectType}:${pill.url ?? "anon"}`}
+                    object={pill}
+                    sourceCount={mentionCount}
+                    sourceSummary={sourceLabels.join(", ")}
+                  />
+                ))}
+            </div>
+          </PropertyRow>
+        ) : null}
+
         <PropertyPicker
           inline={inline}
           label="Parent"
diff --git a/ui/src/components/IssueRelatedWorkPanel.tsx b/ui/src/components/IssueRelatedWorkPanel.tsx
index b3072807f46..dced991906c 100644
--- a/ui/src/components/IssueRelatedWorkPanel.tsx
+++ b/ui/src/components/IssueRelatedWorkPanel.tsx
@@ -1,5 +1,8 @@
 import type { IssueRelatedWorkItem, IssueRelatedWorkSummary } from "@paperclipai/shared";
 import { IssueReferencePill } from "./IssueReferencePill";
+import { ExternalObjectPill } from "./ExternalObjectPill";
+import type { IssueExternalObjectGroup } from "../hooks/useIssueExternalObjects";
+import { externalObjectToneSeverity } from "../lib/external-objects";
 
 type GroupedSource = {
   label: string;
@@ -83,10 +86,101 @@ function Section({
   );
 }
 
+function ExternalObjectsSection({
+  groups,
+  isLoading,
+  isError,
+  onRetry,
+}: {
+  groups: IssueExternalObjectGroup[];
+  isLoading: boolean;
+  isError: boolean;
+  onRetry?: () => void;
+}) {
+  // Severity-first sort with most-recently-changed as the secondary sort.
+  const sorted = [...groups].sort((a, b) => {
+    const aTone = externalObjectToneSeverity(a.pill.statusCategory ? a.group.object?.statusTone ?? null : null);
+    const bTone = externalObjectToneSeverity(b.pill.statusCategory ? b.group.object?.statusTone ?? null : null);
+    if (aTone !== bTone) return bTone - aTone;
+    const aChanged = a.group.object?.lastChangedAt ?? a.group.object?.lastResolvedAt ?? "";
+    const bChanged = b.group.object?.lastChangedAt ?? b.group.object?.lastResolvedAt ?? "";
+    return aChanged < bChanged ? 1 : aChanged > bChanged ? -1 : 0;
+  });
+
+  return (
+    <section className="space-y-3 rounded-lg border border-border p-3">
+      <div className="space-y-1">
+        <h3 className="text-sm font-semibold">External objects</h3>
+        <p className="text-xs text-muted-foreground">
+          Remote work referenced from this issue — pull requests, deployments, tickets in other systems, and more.
+        </p>
+      </div>
+
+      {isError ? (
+        <p className="text-xs text-muted-foreground">
+          Couldn't load external objects.{" "}
+          {onRetry ? (
+            <button
+              type="button"
+              onClick={onRetry}
+              className="text-primary underline-offset-2 hover:underline"
+            >
+              Retry
+            </button>
+          ) : null}
+        </p>
+      ) : isLoading ? (
+        <p className="text-xs text-muted-foreground">Loading external objects…</p>
+      ) : sorted.length === 0 ? (
+        <p className="text-xs text-muted-foreground">
+          This issue does not reference any external objects yet.
+        </p>
+      ) : (
+        <ul className="-mx-1 flex flex-col">
+          {sorted.map(({ pill, mentionCount, sourceLabels, group }) => {
+            const object = group.object;
+            return (
+              <li
+                key={object?.id ?? `${pill.providerKey}:${pill.objectType}:${pill.url ?? "anon"}`}
+                className="flex flex-wrap items-center gap-x-2 gap-y-1.5 rounded-md px-1 py-1.5 hover:bg-accent/40"
+              >
+                <ExternalObjectPill object={pill} sourceCount={mentionCount} sourceSummary={sourceLabels.join(", ")} />
+                {pill.displayTitle ? (
+                  <span className="min-w-0 flex-1 truncate text-sm text-muted-foreground">
+                    {pill.displayTitle}
+                  </span>
+                ) : null}
+                <div className="flex flex-wrap items-center gap-1.5">
+                  {sourceLabels.map((label) => (
+                    <span
+                      key={`${object?.id ?? pill.url ?? label}:${label}`}
+                      className="inline-flex items-center gap-1 rounded-full border border-border bg-muted/40 px-2 py-0.5 text-xs text-muted-foreground"
+                    >
+                      <span>{label}</span>
+                    </span>
+                  ))}
+                </div>
+              </li>
+            );
+          })}
+        </ul>
+      )}
+    </section>
+  );
+}
+
 export function IssueRelatedWorkPanel({
   relatedWork,
+  externalObjects,
+  externalObjectsLoading,
+  externalObjectsError,
+  onRetryExternalObjects,
 }: {
   relatedWork?: IssueRelatedWorkSummary | null;
+  externalObjects?: IssueExternalObjectGroup[];
+  externalObjectsLoading?: boolean;
+  externalObjectsError?: boolean;
+  onRetryExternalObjects?: () => void;
 }) {
   const outbound = relatedWork?.outbound ?? [];
   const inbound = relatedWork?.inbound ?? [];
@@ -99,6 +193,12 @@ export function IssueRelatedWorkPanel({
         items={outbound}
         emptyLabel="This task does not reference any other tasks yet."
       />
+      <ExternalObjectsSection
+        groups={externalObjects ?? []}
+        isLoading={Boolean(externalObjectsLoading)}
+        isError={Boolean(externalObjectsError)}
+        onRetry={onRetryExternalObjects}
+      />
       <Section
         title="Referenced by"
         description="Other tasks that currently point at this task."
diff --git a/ui/src/components/IssueRow.tsx b/ui/src/components/IssueRow.tsx
index e474770a1b1..3a3aaf4b4d3 100644
--- a/ui/src/components/IssueRow.tsx
+++ b/ui/src/components/IssueRow.tsx
@@ -1,5 +1,5 @@
 import type { ReactNode } from "react";
-import type { Issue, IssueRecoveryAction } from "@paperclipai/shared";
+import type { ExternalObjectSummary, Issue, IssueRecoveryAction } from "@paperclipai/shared";
 import { Link } from "@/lib/router";
 import { Eye, Flag, X } from "lucide-react";
 import {
@@ -16,6 +16,7 @@ import {
 import { StatusIcon } from "./StatusIcon";
 import { productivityReviewTriggerLabel } from "./ProductivityReviewBadge";
 import { hasAssignedBacklogBlocker } from "../lib/issue-blockers";
+import { ExternalObjectStatusSummary } from "./ExternalObjectStatusSummary";
 
 type UnreadState = "hidden" | "visible" | "fading";
 
@@ -28,6 +29,11 @@ interface IssueRowProps {
   desktopLeadingSpacer?: boolean;
   mobileMeta?: ReactNode;
   desktopTrailing?: ReactNode;
+  /**
+   * Optional pre-fetched external-object summary. Renders a compact severity
+   * marker before the rest of `desktopTrailing` on desktop only.
+   */
+  externalObjectSummary?: ExternalObjectSummary | null;
   trailingMeta?: ReactNode;
   titleSuffix?: ReactNode;
   titleClassName?: string;
@@ -51,6 +57,7 @@ export function IssueRow({
   desktopLeadingSpacer = false,
   mobileMeta,
   desktopTrailing,
+  externalObjectSummary,
   trailingMeta,
   titleSuffix,
   titleClassName,
@@ -162,8 +169,11 @@ export function IssueRow({
           ) : null}
         </span>
       </span>
-      {(desktopTrailing || trailingMeta) ? (
+      {(desktopTrailing || trailingMeta || externalObjectSummary) ? (
         <span className="ml-auto hidden shrink-0 items-center gap-2 sm:order-3 sm:flex sm:gap-3">
+          {externalObjectSummary ? (
+            <ExternalObjectStatusSummary summary={externalObjectSummary} compact />
+          ) : null}
           {desktopTrailing}
           {trailingMeta ? (
             <span className="text-xs text-muted-foreground">{trailingMeta}</span>
diff --git a/ui/src/components/MarkdownBody.tsx b/ui/src/components/MarkdownBody.tsx
index 60052cc0942..febb4c5a107 100644
--- a/ui/src/components/MarkdownBody.tsx
+++ b/ui/src/components/MarkdownBody.tsx
@@ -1,4 +1,4 @@
-import { isValidElement, useCallback, useEffect, useId, useRef, useState, type ReactNode } from "react";
+import { isValidElement, useCallback, useEffect, useId, useMemo, useRef, useState, type ReactNode } from "react";
 import { useQuery } from "@tanstack/react-query";
 import { Check, Copy, ExternalLink, Github, WrapText } from "lucide-react";
 import Markdown, { defaultUrlTransform, type Components, type Options } from "react-markdown";
@@ -15,6 +15,33 @@ import { parseWorkspaceFileHref, remarkWorkspaceFileRefs, WORKSPACE_FILE_HREF_PR
 import { remarkSoftBreaks } from "../lib/remark-soft-breaks";
 import { StatusIcon } from "./StatusIcon";
 import { WorkspaceFileLink } from "./WorkspaceFileLink";
+import { ExternalObjectStatusIcon } from "./ExternalObjectStatusIcon";
+import {
+  externalObjectCategoryLabel,
+  externalObjectLivenessLabel,
+  externalObjectProviderLabel,
+} from "../lib/external-objects";
+import { normalizeExternalObjectHref } from "../lib/external-object-href";
+import type {
+  ExternalObjectLivenessState,
+  ExternalObjectStatusCategory,
+} from "@paperclipai/shared";
+
+/**
+ * Host-resolved external-object metadata for inline markdown decoration.
+ * The renderer only consumes the host normalized fields here — plugin React
+ * is never mounted inline (Phase 1B security review).
+ */
+export interface MarkdownExternalReference {
+  providerKey: string | null;
+  objectType: string | null;
+  statusCategory: ExternalObjectStatusCategory;
+  liveness: ExternalObjectLivenessState;
+  statusLabel?: string | null;
+  displayTitle?: string | null;
+}
+
+export type MarkdownExternalReferenceMap = Record<string, MarkdownExternalReference>;
 
 interface MarkdownBodyProps {
   children: string;
@@ -28,6 +55,12 @@ interface MarkdownBodyProps {
   wikiLinkRoot?: string;
   /** Optional href resolver for wikilinks. Return null to leave a token as plain text. */
   resolveWikiLinkHref?: (target: string, label: string) => string | null | undefined;
+  /**
+   * Optional map of `normalizeExternalObjectHref(href)` → host-resolved metadata.
+   * Hrefs in the markdown that resolve to one of these keys get the inline
+   * status icon prefix used by §2 of the UX spec.
+   */
+  externalReferences?: MarkdownExternalReferenceMap;
   /** Optional resolver for relative image paths (e.g. within export packages) */
   resolveImageSrc?: (src: string) => string | null;
   /** Called when a user clicks an inline image */
@@ -72,6 +105,49 @@ function MarkdownIssueLink({
   );
 }
 
+function MarkdownExternalLink({
+  href,
+  reference,
+  children,
+}: {
+  href: string;
+  reference: MarkdownExternalReference;
+  children: ReactNode;
+}) {
+  const provider = externalObjectProviderLabel(reference.providerKey);
+  const statusLabel = reference.statusLabel ?? externalObjectCategoryLabel(reference.statusCategory);
+  const livenessLabel = externalObjectLivenessLabel(reference.liveness);
+  const livenessSuffix = reference.liveness === "fresh" || reference.liveness === "unknown"
+    ? ""
+    : ` (${livenessLabel})`;
+  const titleParts = [
+    reference.displayTitle ?? `${provider} ${statusLabel}`,
+    `${provider} — ${statusLabel}${livenessSuffix}`,
+  ];
+  const title = titleParts.filter(Boolean).join(" · ");
+  return (
+    <a
+      href={href}
+      target="_blank"
+      rel="noopener noreferrer"
+      data-external-link="resolved"
+      data-external-status={reference.statusCategory}
+      data-external-liveness={reference.liveness}
+      title={title}
+      aria-label={`${provider} ${statusLabel}${livenessSuffix}: ${reference.displayTitle ?? href}`}
+      className="paperclip-markdown-external-ref"
+    >
+      <ExternalObjectStatusIcon
+        category={reference.statusCategory}
+        liveness={reference.liveness}
+        label={`${provider}: ${statusLabel}`}
+        inline
+      />
+      {children}
+    </a>
+  );
+}
+
 function loadMermaid() {
   if (!mermaidLoaderPromise) {
     mermaidLoaderPromise = import("mermaid").then((module) => module.default);
@@ -572,6 +648,7 @@ export function MarkdownBody({
   enableWikiLinks = false,
   wikiLinkRoot,
   resolveWikiLinkHref,
+  externalReferences,
   resolveImageSrc,
   onImageClick,
   linkWorkspaceFileRefs = false,
@@ -584,6 +661,15 @@ export function MarkdownBody({
   const knownPrefixes = company?.companies.length
     ? company.companies.map((c) => c.issuePrefix)
     : undefined;
+  const externalReferenceLookup = useMemo<MarkdownExternalReferenceMap | null>(() => {
+    if (!externalReferences) return null;
+    const lookup: MarkdownExternalReferenceMap = {};
+    for (const [key, value] of Object.entries(externalReferences)) {
+      const normalized = normalizeExternalObjectHref(key) ?? key;
+      lookup[normalized] = value;
+    }
+    return lookup;
+  }, [externalReferences]);
   const remarkPlugins: NonNullable<Options["remarkPlugins"]> = [remarkGfm];
   if (enableWikiLinks) {
     remarkPlugins.push(createRemarkWikiLinks({ wikiLinkRoot, resolveWikiLinkHref }));
@@ -706,6 +792,17 @@ export function MarkdownBody({
           </a>
         );
       }
+      const externalReference = href && externalReferenceLookup
+        ? externalReferenceLookup[normalizeExternalObjectHref(href) ?? ""] ?? null
+        : null;
+      if (externalReference && href) {
+        return (
+          <MarkdownExternalLink href={href} reference={externalReference}>
+            {linkChildren}
+          </MarkdownExternalLink>
+        );
+      }
+
       const isGitHubLink = isGitHubUrl(href);
       const isExternal = isExternalHttpUrl(href);
       const leadingIcon = isGitHubLink ? (
diff --git a/ui/src/components/SidebarProjects.tsx b/ui/src/components/SidebarProjects.tsx
index 968e05d8d89..43244dc2ba4 100644
--- a/ui/src/components/SidebarProjects.tsx
+++ b/ui/src/components/SidebarProjects.tsx
@@ -22,7 +22,9 @@ import { queryKeys } from "../lib/queryKeys";
 import { cn, projectRouteRef, SIDEBAR_RAIL_HIDDEN_LABEL } from "../lib/utils";
 import { useProjectOrder } from "../hooks/useProjectOrder";
 import { resourceMembershipState, useResourceMembershipMutation, useResourceMemberships } from "../hooks/useResourceMemberships";
+import { useProjectExternalObjectSummary } from "../hooks/useIssueExternalObjects";
 import { BudgetSidebarMarker } from "./BudgetSidebarMarker";
+import { ExternalObjectStatusSummary } from "./ExternalObjectStatusSummary";
 import { ProjectTile } from "./ProjectTile";
 import { SidebarSection, type SidebarSectionRadioChoice } from "./SidebarSection";
 import { Button } from "@/components/ui/button";
@@ -122,6 +124,7 @@ function ProjectItem({
   isDragging = false,
 }: ProjectItemProps) {
   const routeRef = projectRouteRef(project);
+  const { summary: externalObjectsSummary } = useProjectExternalObjectSummary(project.id);
 
   const link = (
     <NavLink
@@ -143,6 +146,7 @@ function ProjectItem({
     >
       <ProjectTile color={project.color ?? null} icon={project.icon ?? null} size="xs" />
       <span className={rail ? SIDEBAR_RAIL_HIDDEN_LABEL : "flex-1 truncate"}>{project.name}</span>
+      {!rail ? <ExternalObjectStatusSummary summary={externalObjectsSummary} compact /> : null}
       {!rail && project.pauseReason === "budget" ? <BudgetSidebarMarker title="Project paused by budget" /> : null}
     </NavLink>
   );
@@ -230,6 +234,7 @@ function SortableProjectItem(props: ProjectItemProps) {
     transition,
     isDragging,
   } = useSortable({ id: props.project.id });
+  } = useSortable({ id: props.project.id });
 
   return (
     <div
diff --git a/ui/src/hooks/useIssueExternalObjects.ts b/ui/src/hooks/useIssueExternalObjects.ts
new file mode 100644
index 00000000000..2b19f8f04fd
--- /dev/null
+++ b/ui/src/hooks/useIssueExternalObjects.ts
@@ -0,0 +1,158 @@
+import { useMemo } from "react";
+import { useQuery } from "@tanstack/react-query";
+import type {
+  ExternalObjectMentionGroup,
+  ExternalObjectSummary,
+} from "@paperclipai/shared";
+import { externalObjectsApi } from "../api/externalObjects";
+import { queryKeys } from "../lib/queryKeys";
+import { normalizeExternalObjectHref } from "../lib/external-object-href";
+import {
+  formatExternalObjectMentionSourceLabel,
+} from "@paperclipai/shared";
+import type { MarkdownExternalReferenceMap } from "../components/MarkdownBody";
+import type { ExternalObjectPillData } from "../components/ExternalObjectPill";
+
+export interface IssueExternalObjectGroup {
+  pill: ExternalObjectPillData;
+  mentionCount: number;
+  sourceLabels: string[];
+  group: ExternalObjectMentionGroup;
+}
+
+export interface IssueExternalObjectsResult {
+  groups: IssueExternalObjectGroup[];
+  /** Lookup map for `MarkdownBody`'s `externalReferences` prop. */
+  markdownReferences: MarkdownExternalReferenceMap;
+  isLoading: boolean;
+  isError: boolean;
+  refetch: () => void;
+}
+
+/**
+ * Loads `external_objects` for an issue and produces both the per-group rows
+ * (used by the property panel and related-work section) and the markdown URL
+ * lookup map (used by inline decoration). Single source of truth so every
+ * surface reads from the same query result.
+ */
+export function useIssueExternalObjects(issueId: string | null | undefined): IssueExternalObjectsResult {
+  const enabled = Boolean(issueId);
+  const query = useQuery({
+    queryKey: queryKeys.externalObjects.byIssue(issueId ?? "__none__"),
+    queryFn: () => externalObjectsApi.listForIssue(issueId!),
+    enabled,
+    staleTime: 60_000,
+  });
+
+  const groups = useMemo<IssueExternalObjectGroup[]>(() => {
+    const data = query.data ?? [];
+    return data
+      .filter((entry): entry is ExternalObjectMentionGroup => Boolean(entry.object))
+      .map((entry) => {
+        const object = entry.object!;
+        const sourceLabels = entry.sourceLabels && entry.sourceLabels.length > 0
+          ? entry.sourceLabels
+          : Array.from(new Set(entry.mentions.map((mention) =>
+              formatExternalObjectMentionSourceLabel({
+                sourceKind: mention.sourceKind,
+                documentKey: mention.documentKey,
+                propertyKey: mention.propertyKey,
+              }),
+            )));
+        return {
+          group: entry,
+          mentionCount: entry.mentionCount ?? entry.mentions.length,
+          sourceLabels,
+          pill: {
+            providerKey: object.providerKey,
+            objectType: object.objectType,
+            statusCategory: object.statusCategory,
+            liveness: object.liveness,
+            displayTitle: object.displayTitle,
+            statusLabel: object.statusLabel,
+            url: object.sanitizedCanonicalUrl,
+          },
+        };
+      });
+  }, [query.data]);
+
+  const markdownReferences = useMemo<MarkdownExternalReferenceMap>(() => {
+    const result: MarkdownExternalReferenceMap = {};
+    for (const { group } of groups) {
+      const object = group.object;
+      if (!object) continue;
+      // Index by the object's canonical URL.
+      const canonical = normalizeExternalObjectHref(object.sanitizedCanonicalUrl ?? null);
+      if (canonical) {
+        result[canonical] = {
+          providerKey: object.providerKey,
+          objectType: object.objectType,
+          statusCategory: object.statusCategory,
+          liveness: object.liveness,
+          statusLabel: object.statusLabel,
+          displayTitle: object.displayTitle,
+        };
+      }
+      // Also index by every mention's sanitized display URL so user-pasted
+      // hrefs that differ only in case/punctuation still resolve.
+      for (const mention of group.mentions) {
+        const normalizedMention = normalizeExternalObjectHref(
+          mention.sanitizedDisplayUrl ?? null,
+        );
+        if (normalizedMention && !result[normalizedMention]) {
+          result[normalizedMention] = {
+            providerKey: object.providerKey,
+            objectType: object.objectType,
+            statusCategory: object.statusCategory,
+            liveness: object.liveness,
+            statusLabel: object.statusLabel,
+            displayTitle: object.displayTitle,
+          };
+        }
+      }
+    }
+    return result;
+  }, [groups]);
+
+  return {
+    groups,
+    markdownReferences,
+    isLoading: enabled && query.isLoading,
+    isError: query.isError,
+    refetch: () => { void query.refetch(); },
+  };
+}
+
+export function useIssueExternalObjectSummary(issueId: string | null | undefined): {
+  summary: ExternalObjectSummary | null;
+  isLoading: boolean;
+} {
+  const enabled = Boolean(issueId);
+  const query = useQuery({
+    queryKey: queryKeys.externalObjects.issueSummary(issueId ?? "__none__"),
+    queryFn: () => externalObjectsApi.getIssueSummary(issueId!),
+    enabled,
+    staleTime: 60_000,
+  });
+  return {
+    summary: query.data ?? null,
+    isLoading: enabled && query.isLoading,
+  };
+}
+
+export function useProjectExternalObjectSummary(projectId: string | null | undefined): {
+  summary: ExternalObjectSummary | null;
+  isLoading: boolean;
+} {
+  const enabled = Boolean(projectId);
+  const query = useQuery({
+    queryKey: queryKeys.externalObjects.projectSummary(projectId ?? "__none__"),
+    queryFn: () => externalObjectsApi.getProjectSummary(projectId!),
+    enabled,
+    staleTime: 60_000,
+  });
+  return {
+    summary: query.data ?? null,
+    isLoading: enabled && query.isLoading,
+  };
+}
diff --git a/ui/src/lib/inbox.test.ts b/ui/src/lib/inbox.test.ts
index d18bc7c89e5..0c83f8d9f54 100644
--- a/ui/src/lib/inbox.test.ts
+++ b/ui/src/lib/inbox.test.ts
@@ -909,6 +909,7 @@ describe("inbox helpers", () => {
           projects: [],
           workspaces: [],
           liveOnly: false,
+          externalObjectStatuses: [],
           hideRoutineExecutions: true,
         },
       }).map((issue) => issue.id),
@@ -929,6 +930,7 @@ describe("inbox helpers", () => {
           projects: [],
           workspaces: [],
           liveOnly: false,
+          externalObjectStatuses: [],
           hideRoutineExecutions: true,
         },
       }),
@@ -949,6 +951,7 @@ describe("inbox helpers", () => {
           projects: [],
           workspaces: [],
           liveOnly: false,
+          externalObjectStatuses: [],
           hideRoutineExecutions: true,
         },
       }),
@@ -1021,6 +1024,7 @@ describe("inbox helpers", () => {
         projects: ["project-1"],
         workspaces: ["workspace-1"],
         liveOnly: true,
+        externalObjectStatuses: [],
         hideRoutineExecutions: false,
       },
     });
@@ -1036,6 +1040,7 @@ describe("inbox helpers", () => {
         projects: [],
         workspaces: [],
         liveOnly: false,
+        externalObjectStatuses: [],
         hideRoutineExecutions: true,
       },
     });
@@ -1052,6 +1057,7 @@ describe("inbox helpers", () => {
         projects: ["project-1"],
         workspaces: ["workspace-1"],
         liveOnly: true,
+        externalObjectStatuses: [],
         hideRoutineExecutions: false,
       },
     });
@@ -1067,6 +1073,7 @@ describe("inbox helpers", () => {
         projects: [],
         workspaces: [],
         liveOnly: false,
+        externalObjectStatuses: [],
         hideRoutineExecutions: true,
       },
     });
@@ -1101,6 +1108,7 @@ describe("inbox helpers", () => {
         projects: ["project-1"],
         workspaces: ["workspace-1"],
         liveOnly: false,
+        externalObjectStatuses: [],
         hideRoutineExecutions: false,
       },
     });
diff --git a/ui/src/lib/issue-filters.ts b/ui/src/lib/issue-filters.ts
index 63ce019378d..d966ceb66b3 100644
--- a/ui/src/lib/issue-filters.ts
+++ b/ui/src/lib/issue-filters.ts
@@ -19,6 +19,21 @@ export type IssueFilterState = {
   projects: string[];
   workspaces: string[];
   liveOnly?: boolean;
+  /**
+   * External object status filter. Values are special tokens that map to
+   * properties of the issue's external-object summary (rather than to a
+   * single category) so the filter UI can describe intent rather than every
+   * possible permutation.
+   *
+   *   - `failed`         — any external object with `statusCategory in (failed, blocked)`
+   *   - `waiting`        — any external object with `statusCategory in (waiting)`
+   *   - `running`        — any external object with `statusCategory in (running)`
+   *   - `auth_required`  — any external object with `liveness == auth_required`
+   *   - `unreachable`    — any external object with `liveness == unreachable`
+   *   - `stale`          — any external object with `liveness == stale`
+   *   - `none`           — issues with zero external objects
+   */
+  externalObjectStatuses: string[];
   hideRoutineExecutions: boolean;
 };
 
@@ -31,9 +46,34 @@ export const defaultIssueFilterState: IssueFilterState = {
   projects: [],
   workspaces: [],
   liveOnly: false,
+  externalObjectStatuses: [],
   hideRoutineExecutions: false,
 };
 
+export const externalObjectFilterOrder = [
+  "failed",
+  "waiting",
+  "running",
+  "auth_required",
+  "unreachable",
+  "stale",
+  "none",
+];
+
+const EXTERNAL_OBJECT_FILTER_LABELS: Record<string, string> = {
+  failed: "Any failed",
+  waiting: "Any waiting",
+  running: "Any running",
+  auth_required: "Auth required",
+  unreachable: "Unreachable",
+  stale: "Stale",
+  none: "No external objects",
+};
+
+export function externalObjectFilterLabel(value: string): string {
+  return EXTERNAL_OBJECT_FILTER_LABELS[value] ?? issueFilterLabel(value);
+}
+
 export const issueStatusOrder = ["in_progress", "todo", "backlog", "in_review", "blocked", "done", "cancelled"];
 export const issuePriorityOrder = ["critical", "high", "medium", "low"];
 
@@ -72,6 +112,7 @@ export function normalizeIssueFilterState(value: unknown): IssueFilterState {
     projects: normalizeIssueFilterValueArray(candidate.projects),
     workspaces: normalizeIssueFilterValueArray(candidate.workspaces),
     liveOnly: candidate.liveOnly === true,
+    externalObjectStatuses: normalizeIssueFilterValueArray(candidate.externalObjectStatuses),
     hideRoutineExecutions: candidate.hideRoutineExecutions === true,
   };
 }
@@ -182,6 +223,7 @@ export function countActiveIssueFilters(
   if (state.projects.length > 0) count += 1;
   if (state.workspaces.length > 0) count += 1;
   if (state.liveOnly) count += 1;
+  if (state.externalObjectStatuses.length > 0) count += 1;
   if (enableRoutineVisibilityFilter && state.hideRoutineExecutions) count += 1;
   return count;
 }
diff --git a/ui/src/lib/queryKeys.ts b/ui/src/lib/queryKeys.ts
index d5429df38aa..3cb53b8a335 100644
--- a/ui/src/lib/queryKeys.ts
+++ b/ui/src/lib/queryKeys.ts
@@ -139,6 +139,11 @@ export const queryKeys = {
     list: (companyId: string) => ["projects", companyId] as const,
     detail: (id: string) => ["projects", "detail", id] as const,
   },
+  externalObjects: {
+    byIssue: (issueId: string) => ["external-objects", "by-issue", issueId] as const,
+    issueSummary: (issueId: string) => ["external-objects", "issue-summary", issueId] as const,
+    projectSummary: (projectId: string) => ["external-objects", "project-summary", projectId] as const,
+  },
   goals: {
     list: (companyId: string) => ["goals", companyId] as const,
     detail: (id: string) => ["goals", "detail", id] as const,
diff --git a/ui/src/pages/IssueDetail.tsx b/ui/src/pages/IssueDetail.tsx
index 342313bc0f9..8817f5334e5 100644
--- a/ui/src/pages/IssueDetail.tsx
+++ b/ui/src/pages/IssueDetail.tsx
@@ -88,6 +88,7 @@ import { IssueScheduledRetryCard } from "../components/IssueScheduledRetryCard";
 import { IssueProperties } from "../components/IssueProperties";
 import { PauseAffectsSummaryView } from "../components/interrupt-handoff/InterruptHandoffViews";
 import { computePauseAffectsSummary } from "../lib/interrupt-handoff";
+import { useIssueExternalObjects } from "../hooks/useIssueExternalObjects";
 import { IssueRunLedger } from "../components/IssueRunLedger";
 import { IssueWorkspaceCard } from "../components/IssueWorkspaceCard";
 import type { MentionOption } from "../components/MarkdownEditor";
@@ -1355,6 +1356,7 @@ export function IssueDetail() {
     enabled: !!issueId,
   });
   const resolvedCompanyId = issue?.companyId ?? selectedCompanyId;
+  const externalObjectsState = useIssueExternalObjects(issue?.id ?? null);
   const commentComposerDisabledReason = useMemo(() => {
     if (!issue?.currentExecutionWorkspace || !isClosedIsolatedExecutionWorkspace(issue.currentExecutionWorkspace)) {
       return null;
@@ -2859,6 +2861,10 @@ export function IssueDetail() {
         onAddSubIssue={openNewSubIssue}
         onUpdate={handleIssuePropertiesUpdate}
         hasActiveRun={resolvedHasActiveRun}
+        externalObjects={externalObjectsState.groups}
+        externalObjectsLoading={externalObjectsState.isLoading}
+        externalObjectsError={externalObjectsState.isError}
+        onRetryExternalObjects={externalObjectsState.refetch}
       />
     );
     return () => closePanel();
@@ -2871,6 +2877,10 @@ export function IssueDetail() {
     panelChildIssues,
     panelIssue,
     resolvedHasActiveRun,
+    externalObjectsState.groups,
+    externalObjectsState.isLoading,
+    externalObjectsState.isError,
+    externalObjectsState.refetch,
   ]);
 
   const goToInboxShortcutArmedRef = useRef(false);
@@ -3947,6 +3957,7 @@ export function IssueDetail() {
           multiline
           foldable
           mentions={mentionOptions}
+          externalReferences={externalObjectsState.markdownReferences}
           imageUploadHandler={async (file) => {
             const attachment = await uploadAttachment.mutateAsync(file);
             return attachment.contentPath;
@@ -4268,7 +4279,13 @@ export function IssueDetail() {
         </TabsContent>
 
         <TabsContent value="related-work">
-          <IssueRelatedWorkPanel relatedWork={issue.relatedWork} />
+          <IssueRelatedWorkPanel
+            relatedWork={issue.relatedWork}
+            externalObjects={externalObjectsState.groups}
+            externalObjectsLoading={externalObjectsState.isLoading}
+            externalObjectsError={externalObjectsState.isError}
+            onRetryExternalObjects={externalObjectsState.refetch}
+          />
         </TabsContent>
 
         {activePluginTab && (
@@ -4456,6 +4473,10 @@ export function IssueDetail() {
                 onUpdate={(data) => updateIssue.mutate(data)}
                 inline
                 hasActiveRun={resolvedHasActiveRun}
+                externalObjects={externalObjectsState.groups}
+                externalObjectsLoading={externalObjectsState.isLoading}
+                externalObjectsError={externalObjectsState.isError}
+                onRetryExternalObjects={externalObjectsState.refetch}
               />
             </div>
           </ScrollArea>