diff --git a/frontend/src/app/components/share/IncludesList.tsx b/frontend/src/app/components/share/IncludesList.tsx
new file mode 100644
index 00000000..2cd6f290
--- /dev/null
+++ b/frontend/src/app/components/share/IncludesList.tsx
@@ -0,0 +1,87 @@
+// The "what's inside this bundle" panel, shared by the Share and Import modals:
+// the root entity, the dependencies pulled in with it, and any environment
+// requirements (an Action the importer must enable themselves).
+import React from 'react';
+import Box from '@mui/material/Box';
+import Typography from '@mui/material/Typography';
+
+import { useClaudeTokens } from '@/shared/styles/ThemeContext';
+
+import { BundleSummary } from './shareTypes';
+
+const KIND_LABEL: Record<string, string> = {
+  skill: 'Skill',
+  app: 'App',
+  dashboard: 'Dashboard',
+  mode: 'Mode',
+  workflow: 'Workflow',
+  session: 'Agent',
+};
+
+const IncludesList: React.FC<{ summary: BundleSummary }> = ({ summary }) => {
+  const c = useClaudeTokens();
+
+  const Row: React.FC<{ tag: string; name: string; detail?: string; faded?: boolean }> = ({
+    tag,
+    name,
+    detail,
+    faded,
+  }) => (
+    <Box sx={{ display: 'flex', alignItems: 'center', gap: 1, py: 0.5 }}>
+      <Typography
+        sx={{
+          fontSize: '0.6rem',
+          fontWeight: 700,
+          letterSpacing: '0.04em',
+          textTransform: 'uppercase',
+          color: c.text.tertiary,
+          minWidth: 60,
+          flexShrink: 0,
+        }}
+      >
+        {tag}
+      </Typography>
+      <Typography
+        sx={{
+          fontSize: '0.85rem',
+          color: faded ? c.text.muted : c.text.primary,
+          flex: 1,
+          overflow: 'hidden',
+          textOverflow: 'ellipsis',
+          whiteSpace: 'nowrap',
+        }}
+      >
+        {name}
+      </Typography>
+      {detail && (
+        <Typography sx={{ fontSize: '0.72rem', color: c.text.muted, flexShrink: 0 }}>{detail}</Typography>
+      )}
+    </Box>
+  );
+
+  return (
+    <Box
+      sx={{
+        border: `1px solid ${c.border.subtle}`,
+        borderRadius: `${c.radius.md}px`,
+        bgcolor: c.bg.surface,
+        px: 1.5,
+        py: 0.5,
+      }}
+    >
+      <Row tag={KIND_LABEL[summary.root.type] || summary.root.type} name={summary.root.name} />
+      {summary.includes.map((it, i) => (
+        <Row key={`inc-${i}`} tag={KIND_LABEL[it.type] || it.type} name={it.name} detail={it.detail} />
+      ))}
+      {summary.requirements.length > 0 && (
+        <Box sx={{ mt: 0.5, pt: 0.5, borderTop: `1px solid ${c.border.subtle}` }}>
+          {summary.requirements.map((r, i) => (
+            <Row key={`req-${i}`} tag="Needs" name={r.label} detail={r.detail} faded />
+          ))}
+        </Box>
+      )}
+    </Box>
+  );
+};
+
+export default IncludesList;
diff --git a/frontend/src/app/components/share/ShareButton.tsx b/frontend/src/app/components/share/ShareButton.tsx
new file mode 100644
index 00000000..90d369e5
--- /dev/null
+++ b/frontend/src/app/components/share/ShareButton.tsx
@@ -0,0 +1,60 @@
+// The reusable top-right Share affordance. Drop it on any modality's surface.
+// 'icon' is the Anthropic-style header icon; 'menuItem' is for a sidebar "..."
+// overflow menu. Click always stops propagation so card/header parents that own
+// their own onClick don't also fire.
+import React, { useState } from 'react';
+import IconButton from '@mui/material/IconButton';
+import Tooltip from '@mui/material/Tooltip';
+import MenuItem from '@mui/material/MenuItem';
+import ListItemIcon from '@mui/material/ListItemIcon';
+import IosShareIcon from '@mui/icons-material/IosShare';
+
+import { useClaudeTokens } from '@/shared/styles/ThemeContext';
+
+import ShareModal from './ShareModal';
+import { ShareTarget } from './shareTypes';
+
+interface Props {
+  target: ShareTarget;
+  size?: 'small' | 'medium';
+  variant?: 'icon' | 'menuItem';
+  iconFontSize?: number;
+  onOpen?: () => void; // let a parent close its overflow menu when we take over
+}
+
+const ShareButton: React.FC<Props> = ({ target, size = 'small', variant = 'icon', iconFontSize = 18, onOpen }) => {
+  const c = useClaudeTokens();
+  const [open, setOpen] = useState(false);
+
+  const start = (e: React.MouseEvent) => {
+    e.stopPropagation();
+    onOpen?.();
+    setOpen(true);
+  };
+
+  return (
+    <>
+      {variant === 'menuItem' ? (
+        <MenuItem onClick={start} sx={{ fontSize: '0.85rem', color: c.text.primary, gap: 1 }}>
+          <ListItemIcon sx={{ minWidth: 0, color: c.text.tertiary }}>
+            <IosShareIcon sx={{ fontSize: 16 }} />
+          </ListItemIcon>
+          Share
+        </MenuItem>
+      ) : (
+        <Tooltip title="Share">
+          <IconButton
+            size={size}
+            onClick={start}
+            sx={{ color: c.text.tertiary, '&:hover': { color: c.accent.primary } }}
+          >
+            <IosShareIcon sx={{ fontSize: iconFontSize }} />
+          </IconButton>
+        </Tooltip>
+      )}
+      {open && <ShareModal target={target} open={open} onClose={() => setOpen(false)} />}
+    </>
+  );
+};
+
+export default ShareButton;
diff --git a/frontend/src/app/components/share/ShareModal.tsx b/frontend/src/app/components/share/ShareModal.tsx
new file mode 100644
index 00000000..5a8568a1
--- /dev/null
+++ b/frontend/src/app/components/share/ShareModal.tsx
@@ -0,0 +1,213 @@
+// Anthropic-style Share modal. v1 ships one real action, Download .swarm; the
+// "Create share link" row is shown but disabled (that hosted-link flow is v2).
+import React, { useCallback, useEffect, useState } from 'react';
+import Box from '@mui/material/Box';
+import Typography from '@mui/material/Typography';
+import Dialog from '@mui/material/Dialog';
+import Button from '@mui/material/Button';
+import IconButton from '@mui/material/IconButton';
+import Chip from '@mui/material/Chip';
+import CircularProgress from '@mui/material/CircularProgress';
+import Snackbar from '@mui/material/Snackbar';
+import Alert from '@mui/material/Alert';
+import CloseIcon from '@mui/icons-material/Close';
+import DownloadIcon from '@mui/icons-material/Download';
+import LinkIcon from '@mui/icons-material/Link';
+
+import { useClaudeTokens } from '@/shared/styles/ThemeContext';
+
+import IncludesList from './IncludesList';
+import { downloadSwarm, exportPreflight } from './shareApi';
+import { ExportPreflight, ShareTarget } from './shareTypes';
+
+interface Props {
+  target: ShareTarget;
+  open: boolean;
+  onClose: () => void;
+}
+
+const ShareModal: React.FC<Props> = ({ target, open, onClose }) => {
+  const c = useClaudeTokens();
+  const [preflight, setPreflight] = useState<ExportPreflight | null>(null);
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState('');
+  const [downloading, setDownloading] = useState(false);
+  const [toast, setToast] = useState('');
+
+  const load = useCallback(() => {
+    setPreflight(null);
+    setError('');
+    setLoading(true);
+    let alive = true;
+    exportPreflight(target)
+      .then((pf) => alive && setPreflight(pf))
+      .catch((e) => alive && setError(e?.message || "We couldn't read this for sharing."))
+      .finally(() => alive && setLoading(false));
+    return () => {
+      alive = false;
+    };
+  }, [target.kind, target.id]);
+
+  useEffect(() => {
+    if (!open) return;
+    return load();
+  }, [open, load]);
+
+  const handleDownload = async () => {
+    if (!preflight) return;
+    setDownloading(true);
+    try {
+      await downloadSwarm(target, preflight.filename);
+      setToast(`Saved ${preflight.filename}`);
+      onClose();
+    } catch (e: any) {
+      setError(e?.message || "We couldn't build the file.");
+    } finally {
+      setDownloading(false);
+    }
+  };
+
+  const optionRow = (
+    selected: boolean,
+    icon: React.ReactNode,
+    title: string,
+    subtitle: string,
+    disabled?: boolean,
+    chip?: string,
+  ) => (
+    <Box
+      sx={{
+        display: 'flex',
+        alignItems: 'center',
+        gap: 1.5,
+        p: 1.5,
+        mb: 1,
+        borderRadius: `${c.radius.md}px`,
+        border: `1px solid ${selected ? c.accent.primary : c.border.subtle}`,
+        bgcolor: selected ? `${c.accent.primary}0d` : 'transparent',
+        opacity: disabled ? 0.5 : 1,
+        cursor: disabled ? 'default' : 'default',
+      }}
+    >
+      <Box sx={{ color: selected ? c.accent.primary : c.text.tertiary, display: 'flex' }}>{icon}</Box>
+      <Box sx={{ flex: 1, minWidth: 0 }}>
+        <Box sx={{ display: 'flex', alignItems: 'center', gap: 1 }}>
+          <Typography sx={{ fontSize: '0.88rem', fontWeight: 600, color: c.text.primary }}>{title}</Typography>
+          {chip && (
+            <Chip
+              label={chip}
+              size="small"
+              sx={{ height: 18, fontSize: '0.62rem', bgcolor: c.bg.secondary, color: c.text.muted }}
+            />
+          )}
+        </Box>
+        <Typography sx={{ fontSize: '0.78rem', color: c.text.muted }}>{subtitle}</Typography>
+      </Box>
+    </Box>
+  );
+
+  return (
+    <>
+      <Dialog
+        open={open}
+        onClose={onClose}
+        maxWidth={false}
+        PaperProps={{
+          sx: {
+            width: 440,
+            maxWidth: '92vw',
+            bgcolor: c.bg.page,
+            borderRadius: `${c.radius.xl}px`,
+            border: `1px solid ${c.border.subtle}`,
+            boxShadow: c.shadow.lg,
+          },
+        }}
+      >
+        <Box sx={{ display: 'flex', alignItems: 'center', justifyContent: 'space-between', px: 3, pt: 2.5, pb: 1 }}>
+          <Typography sx={{ fontSize: '1.05rem', fontWeight: 700, color: c.text.primary }}>
+            Share {target.name}
+          </Typography>
+          <IconButton size="small" onClick={onClose} sx={{ color: c.text.tertiary }}>
+            <CloseIcon sx={{ fontSize: 18 }} />
+          </IconButton>
+        </Box>
+
+        <Box sx={{ px: 3, pb: 3 }}>
+          <Box sx={{ mb: 2 }}>
+            {loading ? (
+              <Box sx={{ display: 'flex', justifyContent: 'center', py: 3 }}>
+                <CircularProgress size={20} sx={{ color: c.accent.primary }} />
+              </Box>
+            ) : error ? (
+              <Box sx={{ py: 1 }}>
+                <Typography sx={{ fontSize: '0.85rem', color: c.text.secondary, mb: 1 }}>{error}</Typography>
+                <Button size="small" onClick={load} sx={{ textTransform: 'none', color: c.accent.primary }}>
+                  Try again
+                </Button>
+              </Box>
+            ) : preflight ? (
+              <IncludesList summary={preflight.summary} />
+            ) : null}
+          </Box>
+
+          {optionRow(true, <DownloadIcon sx={{ fontSize: 20 }} />, 'Download .swarm file', 'Save a file you can send to anyone.')}
+          {optionRow(
+            false,
+            <LinkIcon sx={{ fontSize: 20 }} />,
+            'Create share link',
+            'A link that opens straight in OpenSwarm.',
+            true,
+            'Coming soon',
+          )}
+
+          <Box sx={{ display: 'flex', justifyContent: 'flex-end', mt: 1 }}>
+            <Button
+              variant="contained"
+              onClick={handleDownload}
+              disabled={!preflight || downloading}
+              startIcon={
+                downloading ? (
+                  <CircularProgress size={14} sx={{ color: c.text.inverse }} />
+                ) : (
+                  <DownloadIcon sx={{ fontSize: 16 }} />
+                )
+              }
+              sx={{
+                bgcolor: c.accent.primary,
+                '&:hover': { bgcolor: c.accent.pressed },
+                '&.Mui-disabled': { bgcolor: c.border.medium, color: c.text.muted },
+                textTransform: 'none',
+                borderRadius: `${c.radius.md}px`,
+                px: 2.5,
+                py: 0.6,
+                fontSize: '0.85rem',
+                fontWeight: 600,
+                boxShadow: 'none',
+              }}
+            >
+              Download .swarm
+            </Button>
+          </Box>
+        </Box>
+      </Dialog>
+
+      <Snackbar
+        open={!!toast}
+        autoHideDuration={3000}
+        onClose={() => setToast('')}
+        anchorOrigin={{ vertical: 'bottom', horizontal: 'center' }}
+      >
+        <Alert
+          severity="success"
+          variant="outlined"
+          onClose={() => setToast('')}
+          sx={{ bgcolor: c.bg.surface, color: c.text.primary, border: `1px solid ${c.border.medium}`, fontSize: '0.82rem' }}
+        >
+          {toast}
+        </Alert>
+      </Snackbar>
+    </>
+  );
+};
+
+export default ShareModal;
diff --git a/frontend/src/app/components/share/shareApi.ts b/frontend/src/app/components/share/shareApi.ts
new file mode 100644
index 00000000..daa244b1
--- /dev/null
+++ b/frontend/src/app/components/share/shareApi.ts
@@ -0,0 +1,72 @@
+// Thin fetch helpers for the .swarm endpoints. The global interceptor in
+// shared/config.ts attaches the bearer token, so we never set it here. Errors
+// surface the backend's short detail message (those are already user-facing) or
+// a friendly fallback; callers translate to a toast.
+import { API_BASE } from '@/shared/config';
+
+import {
+  ExportPreflight,
+  ImportCommitResult,
+  ImportPreflight,
+  ShareTarget,
+} from './shareTypes';
+
+async function _detail(res: Response, fallback: string): Promise<string> {
+  try {
+    const data = await res.json();
+    if (data && typeof data.detail === 'string' && data.detail) return data.detail;
+  } catch {
+    /* non-JSON error body */
+  }
+  return fallback;
+}
+
+export async function exportPreflight(target: ShareTarget): Promise<ExportPreflight> {
+  const res = await fetch(`${API_BASE}/swarm/export/preflight`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ type: target.kind, id: target.id }),
+  });
+  if (!res.ok) throw new Error(await _detail(res, "We couldn't read this for sharing."));
+  return res.json();
+}
+
+export async function downloadSwarm(target: ShareTarget, filename: string): Promise<void> {
+  const res = await fetch(`${API_BASE}/swarm/export`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ type: target.kind, id: target.id }),
+  });
+  if (!res.ok) throw new Error(await _detail(res, "We couldn't build the file."));
+  const blob = await res.blob();
+  const url = URL.createObjectURL(blob);
+  const a = document.createElement('a');
+  a.href = url;
+  a.download = filename;
+  document.body.appendChild(a);
+  a.click();
+  a.remove();
+  URL.revokeObjectURL(url);
+}
+
+export async function importPreflight(file: File): Promise<ImportPreflight> {
+  const form = new FormData();
+  form.append('file', file);
+  // No Content-Type header: the browser sets the multipart boundary itself.
+  const res = await fetch(`${API_BASE}/swarm/import/preflight`, { method: 'POST', body: form });
+  if (!res.ok) throw new Error(await _detail(res, "We couldn't read this file."));
+  return res.json();
+}
+
+export async function importCommit(
+  stagingToken: string,
+  acceptRequirements: string[] = [],
+): Promise<ImportCommitResult> {
+  const res = await fetch(`${API_BASE}/swarm/import/commit`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ staging_token: stagingToken, accept_requirements: acceptRequirements }),
+  });
+  if (!res.ok) throw new Error(await _detail(res, "We couldn't finish the import."));
+  return res.json();
+}
diff --git a/frontend/src/app/components/share/shareTypes.ts b/frontend/src/app/components/share/shareTypes.ts
new file mode 100644
index 00000000..65ed258c
--- /dev/null
+++ b/frontend/src/app/components/share/shareTypes.ts
@@ -0,0 +1,53 @@
+// Shared types for the .swarm share/import UI. The *Response shapes mirror the
+// backend pydantic models in backend/apps/swarm/models.py; keep them in sync.
+
+export type ShareKind = 'skill' | 'app' | 'workflow' | 'dashboard';
+
+export interface ShareTarget {
+  kind: ShareKind;
+  id: string;
+  name: string;
+}
+
+export interface IncludeItem {
+  type: string;
+  name: string;
+  detail?: string;
+}
+
+export interface RequirementView {
+  kind: string;
+  key: string;
+  label: string;
+  detail?: string;
+}
+
+export interface BundleSummary {
+  root: IncludeItem;
+  includes: IncludeItem[];
+  requirements: RequirementView[];
+  counts: Record<string, number>;
+}
+
+export interface ExportPreflight {
+  ok: boolean;
+  summary: BundleSummary;
+  filename: string;
+  link_supported: boolean;
+}
+
+export interface ImportPreflight {
+  ok: boolean;
+  summary: BundleSummary;
+  staging_token: string;
+  conflicts: IncludeItem[];
+  warnings: string[];
+}
+
+export interface ImportCommitResult {
+  ok: boolean;
+  root_type: ShareKind;
+  root_id: string;
+  created: Record<string, string[]>;
+  unresolved_requirements: RequirementView[];
+}
diff --git a/frontend/src/app/pages/Skills/Skills.tsx b/frontend/src/app/pages/Skills/Skills.tsx
index 3ee42800..482208e8 100644
--- a/frontend/src/app/pages/Skills/Skills.tsx
+++ b/frontend/src/app/pages/Skills/Skills.tsx
@@ -51,6 +51,7 @@ import {
   RegistrySkillDetail,
 } from '@/shared/state/skillRegistrySlice';
 import { onboardingBus } from '@/app/components/Onboarding/eventBus';
+import ShareButton from '@/app/components/share/ShareButton';
 import SkillBuilderChat, { SkillPreviewData } from './SkillBuilderChat';
 
 interface SkillForm {
@@ -619,6 +620,7 @@ const Skills: React.FC = () => {
                 )}
               </Box>
               <Box sx={{ display: 'flex', gap: 0.5, alignItems: 'center' }}>
+                <ShareButton target={{ kind: 'skill', id: selectedLocal.id, name: selectedLocal.name }} />
                 <Tooltip title="Edit">
                   <IconButton size="small" onClick={() => openEdit(selectedLocal)} sx={{ color: c.text.tertiary, '&:hover': { color: c.accent.primary } }}>
                     <EditIcon sx={{ fontSize: 18 }} />