diff --git a/frontend/agenda-calendar.js b/frontend/agenda-calendar.js
new file mode 100644
index 0000000..84516e9
--- /dev/null
+++ b/frontend/agenda-calendar.js
@@ -0,0 +1,180 @@
+(function (root) {
+  'use strict';
+
+  function escapeText(value) {
+    return String(value || '')
+      .replace(/\\/g, '\\\\')
+      .replace(/\r?\n/g, '\\n')
+      .replace(/,/g, '\\,')
+      .replace(/;/g, '\\;');
+  }
+
+  function calendarDay(value) {
+    const match = String(value || '').match(/^(\d{4})-(\d{2})-(\d{2})/);
+    return match ? match.slice(1).join('') : '';
+  }
+
+  function nextDay(day) {
+    const date = new Date(Date.UTC(
+      Number(day.slice(0, 4)), Number(day.slice(4, 6)) - 1, Number(day.slice(6, 8)) + 1
+    ));
+    return date.toISOString().slice(0, 10).replace(/-/g, '');
+  }
+
+  function uid(item) {
+    const repository = String(item.repository || '').replace(/[^a-z0-9]+/gi, '-').replace(/^-|-$/g, '').toLowerCase();
+    return `issue-${Number(item.number)}@${repository}`;
+  }
+
+  function foldLine(line) {
+    const encoder = new TextEncoder();
+    const chunks = [];
+    let chunk = '';
+    let bytes = 0;
+    let limit = 75;
+    for (const character of String(line)) {
+      const width = encoder.encode(character).length;
+      if (chunk && bytes + width > limit) {
+        chunks.push(chunk);
+        chunk = character;
+        bytes = width;
+        limit = 74;
+      } else {
+        chunk += character;
+        bytes += width;
+      }
+    }
+    chunks.push(chunk);
+    return chunks.join('\r\n ');
+  }
+
+  function serializeAgendaCalendar(items, { generatedOn } = {}) {
+    const stampDay = String(generatedOn || new Date().toISOString().slice(0, 10).replace(/-/g, ''));
+    const lines = ['BEGIN:VCALENDAR', 'VERSION:2.0', 'PRODID:-//Stackchain//Agenda Snapshot//EN',
+      'CALSCALE:GREGORIAN', 'METHOD:PUBLISH', 'X-WR-CALNAME:Stackchain Agenda'];
+    (items || []).forEach(item => {
+      const day = calendarDay(item.due_date);
+      if (!day || !Number.isInteger(Number(item.number)) || !item.repository) return;
+      lines.push(
+        'BEGIN:VEVENT',
+        `UID:${uid(item)}`,
+        `DTSTAMP:${stampDay}T000000Z`,
+        `DTSTART;VALUE=DATE:${day}`,
+        `DTEND;VALUE=DATE:${nextDay(day)}`,
+        `SUMMARY:${escapeText(item.title)}`,
+        `DESCRIPTION:${escapeText(`${item.repository}#${item.number} · Stackchain Agenda snapshot`)}`,
+        `URL:${String(item.url || '')}`,
+        'TRANSP:TRANSPARENT',
+        'END:VEVENT',
+      );
+    });
+    lines.push('END:VCALENDAR');
+    return lines.map(foldLine).join('\r\n') + '\r\n';
+  }
+
+  async function deliverCalendarSnapshot({
+    text,
+    filename,
+    navigator,
+    document,
+    urlApi,
+    FileCtor,
+  }) {
+    const file = new FileCtor([text], filename, { type: 'text/calendar;charset=utf-8' });
+    const sharePayload = { files: [file], title: 'Stackchain Agenda', text: 'Agenda calendar snapshot' };
+    if (typeof navigator?.share === 'function' && typeof navigator?.canShare === 'function' &&
+        navigator.canShare(sharePayload)) {
+      await navigator.share(sharePayload);
+      return 'shared';
+    }
+    const href = urlApi.createObjectURL(file);
+    try {
+      const anchor = document.createElement('a');
+      anchor.href = href;
+      anchor.download = filename;
+      anchor.click();
+    } finally {
+      urlApi.revokeObjectURL(href);
+    }
+    return 'downloaded';
+  }
+
+  function mountAgendaCalendarExport({
+    qs,
+    getItems,
+    escapeHtml,
+    onDone,
+    windowObject = root,
+    navigatorObject = root.navigator,
+    documentObject = root.document,
+    urlApi = root.URL,
+    FileCtor = root.File,
+  }) {
+    const sheet = qs('#agenda-export-sheet');
+    let items = [];
+    let scrollY = 0;
+    let trigger = null;
+    const selectedItems = () => Array.from(qs('#agenda-export-items').querySelectorAll('input[type="checkbox"]'))
+      .filter(checkbox => checkbox.checked)
+      .map(checkbox => items[Number(checkbox.value)])
+      .filter(Boolean);
+    const updateSelection = () => {
+      const selected = selectedItems();
+      qs('#share-agenda-export').disabled = selected.length === 0;
+      qs('#agenda-export-status').textContent = selected.length + ' of ' + items.length +
+        (items.length === 1 ? ' deadline selected.' : ' deadlines selected.');
+    };
+    const close = () => {
+      sheet.close();
+      windowObject.scrollTo({ top:scrollY, behavior:'instant' });
+      trigger?.focus();
+    };
+    qs('#open-agenda-export').addEventListener('click', event => {
+      items = getItems();
+      scrollY = windowObject.scrollY;
+      trigger = event.currentTarget;
+      qs('#agenda-export-items').innerHTML = items.map((item, index) =>
+        '<label class="agenda-export-item"><input type="checkbox" value="' + index + '" checked> ' +
+        '<span><strong>' + escapeHtml(item.title) + '</strong><small>' +
+        escapeHtml(item.repository + '#' + item.number + ' · ' + item.due_date.slice(0, 10)) +
+        '</small></span></label>'
+      ).join('');
+      qs('#agenda-export-items').querySelectorAll('input[type="checkbox"]').forEach(checkbox =>
+        checkbox.addEventListener('change', updateSelection)
+      );
+      updateSelection();
+      sheet.showModal();
+      qs('#cancel-agenda-export').focus();
+    });
+    qs('#cancel-agenda-export').addEventListener('click', close);
+    sheet.addEventListener('cancel', event => {
+      event.preventDefault();
+      close();
+    });
+    qs('#share-agenda-export').addEventListener('click', async () => {
+      const selected = selectedItems();
+      if (!selected.length) return;
+      const button = qs('#share-agenda-export');
+      button.disabled = true;
+      qs('#agenda-export-status').textContent = 'Preparing calendar snapshot…';
+      const day = new Date().toISOString().slice(0, 10);
+      try {
+        const text = serializeAgendaCalendar(selected, { generatedOn:day.replace(/-/g, '') });
+        const result = await deliverCalendarSnapshot({
+          text, filename:'stackchain-agenda-' + day + '.ics',
+          navigator:navigatorObject, document:documentObject, urlApi, FileCtor,
+        });
+        onDone(result);
+        close();
+      } catch (error) {
+        qs('#agenda-export-status').textContent = error?.name === 'AbortError' ?
+          'Share cancelled. Nothing was exported.' : 'Calendar export failed. Retry without leaving Agenda.';
+        button.disabled = false;
+      }
+    });
+  }
+
+  const api = { calendarDay, deliverCalendarSnapshot, escapeText, foldLine, mountAgendaCalendarExport, serializeAgendaCalendar };
+  if (typeof module !== 'undefined' && module.exports) module.exports = api;
+  else root.StackchainAgendaCalendar = api;
+})(typeof window !== 'undefined' ? window : globalThis);
diff --git a/frontend/dashboard.css b/frontend/dashboard.css
index 85c08c0..b5bc5f6 100644
--- a/frontend/dashboard.css
+++ b/frontend/dashboard.css
@@ -419,6 +419,21 @@ textarea { resize: vertical; min-height: 120px; }
 .agenda-replan-actions { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:8px; margin-top:10px; }
 .agenda-replan-actions label { grid-column:1/-1; }
 .agenda-replan-actions input { box-sizing:border-box; min-height:44px; width:100%; max-width:100%; }
+.agenda-export { margin:10px 0; padding:12px; border:1px solid #2f6f9f; border-radius:12px; background:#0d2136; display:flex; align-items:center; justify-content:space-between; gap:12px; }
+.agenda-export p { margin:4px 0 0; }
+.agenda-export button { min-height:44px; flex:0 0 auto; }
+.agenda-export-sheet { box-sizing:border-box; width:min(560px,100%); max-width:none; max-height:none; height:100dvh; margin:0 0 0 auto; padding:0; border:0; color:var(--text); background:#0b1526; }
+.agenda-export-sheet::backdrop { background:rgba(5,12,21,.78); backdrop-filter:blur(4px); }
+.agenda-export-panel { box-sizing:border-box; min-height:100%; display:grid; align-content:start; gap:12px; padding:18px; padding-bottom:calc(18px + env(safe-area-inset-bottom)); overflow:auto; overflow-x:hidden; }
+.agenda-export-panel header { display:flex; align-items:flex-start; justify-content:space-between; gap:12px; }
+.agenda-export-panel h2, .agenda-export-panel header p { margin:0; }
+#agenda-export-items { min-width:0; display:grid; gap:8px; margin:0; padding:0; border:0; }
+.agenda-export-item { min-width:0; min-height:44px; display:flex; align-items:center; gap:10px; padding:10px; border:1px solid #31577f; border-radius:10px; background:#10233a; }
+.agenda-export-item input { width:22px; height:22px; flex:0 0 auto; }
+.agenda-export-item span, .agenda-export-item strong, .agenda-export-item small { min-width:0; display:block; overflow-wrap:anywhere; }
+#cancel-agenda-export, #share-agenda-export { min-height:44px; }
+#share-agenda-export { position:sticky; bottom:0; width:100%; margin-top:auto; }
+@media(max-width:430px) { .agenda-export { align-items:stretch; flex-direction:column; } .agenda-export button { width:100%; } .agenda-export-panel { padding:14px; padding-bottom:calc(14px + env(safe-area-inset-bottom)); } }
 .protect-today { margin:10px 0; padding:12px; border:1px solid #2f6f9f; border-radius:12px; background:#0d2136; display:flex; align-items:center; justify-content:space-between; gap:12px; }
 .protect-today p { margin:4px 0; }
 .protect-today button { min-height:44px; flex:0 0 auto; }
diff --git a/frontend/dashboard.js b/frontend/dashboard.js
index 09c5852..6da5ff8 100644
--- a/frontend/dashboard.js
+++ b/frontend/dashboard.js
@@ -597,6 +597,16 @@
     window.location.hash = '#/my-work/agenda';
     qs('#my-work-action-status').textContent = 'Overdue sweep cancelled. No remaining deadline was changed.';
   });
+
+  StackchainAgendaCalendar.mountAgendaCalendarExport({
+    qs,
+    getItems:() => agendaMyWork(activeMyWork),
+    escapeHtml,
+    onDone:result => {
+      qs('#my-work-action-status').textContent = result === 'shared' ?
+        'Agenda calendar snapshot shared.' : 'Agenda calendar snapshot downloaded.';
+    },
+  });
   let searchReplyAttachmentTarget = null;
   let searchReplyRestoreGeneration = 0;
   let restoringSearchReplyPhotos = false;
@@ -3513,6 +3523,14 @@
       qs('#start-agenda-replan').textContent = 'Replan overdue (' + overdue.length + ')';
       qs('#agenda-replan-controls').hidden = true;
     }
+    const agendaExport = qs('#agenda-export');
+    const agendaExportButton = qs('#open-agenda-export');
+    agendaExport.hidden = selectedWorkFilter !== 'agenda';
+    agendaExportButton.disabled = queueItems.length === 0;
+    qs('#agenda-export-empty').textContent = queueItems.length ?
+      'Review ' + queueItems.length + (queueItems.length === 1 ? ' deadline' : ' deadlines') +
+        ' before sharing a calendar snapshot.' :
+      'No deadlines are available to export from this Agenda.';
     const incomplete = activeWorkStreams().some(stream => workPagination[stream]?.has_more);
     const visible = findQueueItems(queueItems, queueFindQuery);
     const emptyWorkStart = qs('#empty-work-start');
diff --git a/frontend/index.html b/frontend/index.html
index f343150..564037a 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -277,6 +277,13 @@
         </div>
       </div>
     </section>
+    <section class="agenda-export" id="agenda-export" aria-labelledby="agenda-export-heading" hidden>
+      <div>
+        <strong id="agenda-export-heading">Take deadlines with you</strong>
+        <p class="small muted" id="agenda-export-empty">Review this Agenda before sharing a calendar snapshot.</p>
+      </div>
+      <button id="open-agenda-export" type="button">Export to calendar</button>
+    </section>
     <section class="protect-today" id="protect-today-panel" aria-labelledby="protect-today-heading" hidden>
       <div>
         <strong id="protect-today-heading">Deadlines need a plan</strong>
@@ -312,6 +319,19 @@
       </div>
     </div>
   </section>
+  <dialog class="agenda-export-sheet" id="agenda-export-sheet" aria-labelledby="agenda-export-title">
+    <section class="agenda-export-panel">
+      <header>
+        <div><p class="small muted">Calendar handoff</p><h2 id="agenda-export-title">Review Agenda export</h2></div>
+        <button id="cancel-agenda-export" type="button">Cancel</button>
+      </header>
+      <p>This exports a snapshot, not ongoing synchronization. Only checked deadline details leave Stackchain.</p>
+      <fieldset id="agenda-export-items" aria-describedby="agenda-export-privacy"></fieldset>
+      <p class="small muted" id="agenda-export-privacy">Your issue titles, repositories, dates, and forge links are included in the calendar file.</p>
+      <p class="small" id="agenda-export-status" role="status" aria-live="polite"></p>
+      <button id="share-agenda-export" type="button">Share calendar file</button>
+    </section>
+  </dialog>
   <section class="insights-shell" id="insights-sheet" aria-labelledby="insights-heading">
     <div class="insights-header">
       <div><h2 id="insights-heading">Insights</h2><p class="small muted">Context, activity, live signals, and workspace tools.</p></div>
@@ -1780,6 +1800,7 @@
 <script src="static/offline-today.js"></script>
 <script src="static/my-work.js"></script>
 <script src="static/agenda-replan.js"></script>
+<script src="static/agenda-calendar.js"></script>
 <script src="static/protect-today.js"></script>
 <script src="static/notification-undo.js"></script>
 <script src="static/card-planning.js"></script>
diff --git a/frontend/service-worker.js b/frontend/service-worker.js
index 0c5e2dc..e96b003 100644
--- a/frontend/service-worker.js
+++ b/frontend/service-worker.js
@@ -45,6 +45,7 @@ const SHELL = [
   BASE + 'static/offline-today.js',
   BASE + 'static/my-work.js',
   BASE + 'static/agenda-replan.js',
+  BASE + 'static/agenda-calendar.js',
   BASE + 'static/protect-today.js',
   BASE + 'static/notification-undo.js',
   BASE + 'static/card-planning.js',
diff --git a/src/frontend_bundle.py b/src/frontend_bundle.py
index 8df0a97..b5b4a12 100644
--- a/src/frontend_bundle.py
+++ b/src/frontend_bundle.py
@@ -34,7 +34,7 @@ FEATURE_SOURCES = {
     "security-center": ("static/security-center.js",),
     "today-timer": (
         "static/conversation.js", "static/voice-transcript-store.js", "static/voice-conversation-capture.js", "static/mobile-launch.js", "static/mobile-insights.js", "static/mobile-app-shortcuts.js", "static/mobile-plan-today-nav.js", "static/mobile-find-work-nav.js", "static/mobile-pull-refresh.js", "static/live-data-status.js",
-        "static/today-completion.js", "static/card-planning.js", "static/work-detail-position.js", "static/work-route.js", "static/commands.js", "static/saved-searches.js", "static/task-overlay-history.js", "static/search-preview.js", "static/mobile-search-preview-nav.js", "static/search-reply-draft-store.js", "static/conversation-reply-draft-store.js", "static/conversation-photo-drafts.js", "static/search-defer.js", "static/mobile-search-viewport.js", "static/agenda-replan.js", "static/my-work.js", "static/protect-today.js", "static/mobile-today-command-bar.js", "static/mobile-task-dock.js", "static/mobile-work-entry.js", "static/mobile-queue-launcher.js", "static/mobile-delivery-recovery.js", "static/mobile-start-day.js", "static/update-triage-session.js", "static/update-review-handoff.js", "static/update-triage-launcher.js", "static/update-triage-gesture.js", "static/notification-undo.js", "static/today-timer.js", "static/today-break.js", "static/today-progress.js", "static/today-lock-screen.js", "static/today-session-sync.js", "static/today-recap.js", "static/today-wrap-up.js", "static/today-handoff.js",
+        "static/today-completion.js", "static/card-planning.js", "static/work-detail-position.js", "static/work-route.js", "static/commands.js", "static/saved-searches.js", "static/task-overlay-history.js", "static/search-preview.js", "static/mobile-search-preview-nav.js", "static/search-reply-draft-store.js", "static/conversation-reply-draft-store.js", "static/conversation-photo-drafts.js", "static/search-defer.js", "static/mobile-search-viewport.js", "static/agenda-replan.js", "static/agenda-calendar.js", "static/my-work.js", "static/protect-today.js", "static/mobile-today-command-bar.js", "static/mobile-task-dock.js", "static/mobile-work-entry.js", "static/mobile-queue-launcher.js", "static/mobile-delivery-recovery.js", "static/mobile-start-day.js", "static/update-triage-session.js", "static/update-review-handoff.js", "static/update-triage-launcher.js", "static/update-triage-gesture.js", "static/notification-undo.js", "static/today-timer.js", "static/today-break.js", "static/today-progress.js", "static/today-lock-screen.js", "static/today-session-sync.js", "static/today-recap.js", "static/today-wrap-up.js", "static/today-handoff.js",
         "static/today-rollover.js", "static/later-work.js", "static/detail-defer.js", "static/later-picker.js", "static/drafts.js", "static/unfiled-captures.js", "static/unfiled-draft-sync.js",
         "static/assign-and-start.js", "static/filed-claim.js", "static/queue-today.js", "static/create-and-start.js",
         "static/draft-filing-session.js", "static/draft-capacity-dialog.js", "static/work-selection.js",
diff --git a/tests/e2e/test_mobile_home_bootstrap_release.py b/tests/e2e/test_mobile_home_bootstrap_release.py
index 872f3fe..1d50550 100644
--- a/tests/e2e/test_mobile_home_bootstrap_release.py
+++ b/tests/e2e/test_mobile_home_bootstrap_release.py
@@ -11,7 +11,7 @@ if os.getenv("STACKCHAIN_RUN_RELEASE_E2E") != "1":
 pytest.importorskip("playwright.sync_api")
 from playwright.sync_api import expect, sync_playwright
 
-from fake_gitea import FakeGiteaServer
+from fake_gitea import AVAILABLE_ISSUES, FakeGiteaServer
 from test_mobile_offline_issue_release import ACCESS_TOKEN, ROOT, release_server
 
 
@@ -250,3 +250,72 @@ def test_release_artifact_keeps_mobile_delivery_recovery_single_flight(tmp_path:
         fake.shutdown()
         fake.server_close()
         fake_thread.join(timeout=5)
+
+
+@pytest.mark.parametrize(("width", "height"), [(320, 568), (390, 844)])
+def test_release_artifact_reviews_and_downloads_mobile_agenda_snapshot(
+    tmp_path: Path, width: int, height: int
+):
+    archives = sorted((ROOT / "dist").glob("stackchain-dashboard-*.tar.gz"))
+    assert len(archives) == 1, "browser job must download exactly one assembled release archive"
+    original_due_dates = [item.get("due_date") for item in AVAILABLE_ISSUES]
+    AVAILABLE_ISSUES[0]["due_date"] = "2026-08-19"
+    AVAILABLE_ISSUES[1]["due_date"] = "2026-08-20"
+    fake = FakeGiteaServer(("127.0.0.1", 0))
+    fake_thread = threading.Thread(target=fake.serve_forever, daemon=True)
+    fake_thread.start()
+    fake_url = f"http://127.0.0.1:{fake.server_port}"
+    browser_errors: list[str] = []
+    failed_responses: list[str] = []
+
+    try:
+        with release_server(archives[0], tmp_path, fake_url) as origin, sync_playwright() as playwright:
+            browser = playwright.chromium.launch(args=["--ignore-certificate-errors"])
+            page = browser.new_page(viewport={"width": width, "height": height})
+            page.on("pageerror", lambda error: browser_errors.append(error.stack or str(error)))
+            page.on("console", lambda message: browser_errors.append(message.text) if message.type == "error" else None)
+            page.on("response", lambda response: failed_responses.append(f"{response.status} {response.url}") if response.status >= 400 else None)
+            page.goto(origin + "/", wait_until="networkidle")
+            page.locator('input[name="device_label"]').fill("Agenda export release phone")
+            page.locator('input[name="access_token"]').fill(ACCESS_TOKEN)
+            page.locator("#submit-sign-in").click()
+            page.wait_for_url(origin + "/", wait_until="networkidle")
+
+            page.locator('[data-mobile-task="queues"]').click()
+            page.locator('[data-mobile-queue="agenda"]').click()
+            expect(page.locator("#issue-sheet")).to_be_visible()
+            page.locator("#close-issue-sheet").click()
+            expect(page.locator("#issue-sheet")).to_be_hidden()
+            expect(page.locator("#agenda-export")).to_be_visible()
+            trigger = page.locator("#open-agenda-export")
+            expect(trigger).to_be_enabled()
+            bounds = trigger.bounding_box()
+            assert bounds and bounds["height"] >= 44
+            trigger.click()
+            expect(page.locator("#agenda-export-sheet")).to_be_visible()
+            expect(page.locator("#agenda-export-items input:checked")).to_have_count(2)
+            page.locator("#agenda-export-items input").nth(1).uncheck()
+            expect(page.locator("#agenda-export-status")).to_have_text("1 of 2 deadlines selected.")
+            assert page.evaluate("document.documentElement.scrollWidth <= window.innerWidth")
+
+            with page.expect_download() as pending:
+                page.locator("#share-agenda-export").click()
+            download = pending.value
+            text = Path(download.path()).read_text()
+            assert download.suggested_filename.startswith("stackchain-agenda-")
+            assert text.count("BEGIN:VEVENT") == 1
+            assert "SUMMARY:Ship mobile capture" in text
+            assert "Polish desktop filters" not in text
+            expect(trigger).to_be_focused()
+            assert browser_errors == []
+            assert failed_responses == []
+            browser.close()
+    finally:
+        for item, due_date in zip(AVAILABLE_ISSUES, original_due_dates):
+            if due_date is None:
+                item.pop("due_date", None)
+            else:
+                item["due_date"] = due_date
+        fake.shutdown()
+        fake.server_close()
+        fake_thread.join(timeout=5)
diff --git a/tests/test_agenda_calendar.py b/tests/test_agenda_calendar.py
new file mode 100644
index 0000000..2a90ed7
--- /dev/null
+++ b/tests/test_agenda_calendar.py
@@ -0,0 +1,118 @@
+import json
+import subprocess
+from pathlib import Path
+
+import pytest
+
+from tests.dashboard_bundle import dashboard
+
+
+AGENDA_CALENDAR = Path(__file__).parents[1] / "frontend" / "agenda-calendar.js"
+INDEX = Path(__file__).parents[1] / "frontend" / "index.html"
+
+
+def run_node(source: str):
+    completed = subprocess.run(["node", "-e", source], capture_output=True, text=True)
+    assert completed.returncode == 0, completed.stderr
+    return json.loads(completed.stdout)
+
+
+def test_calendar_snapshot_serializes_ordered_all_day_events_with_stable_identity():
+    items = [
+        {
+            "repository": "stackchain/dashboard",
+            "number": 12,
+            "title": "Plan, ship; verify\\path\nnext",
+            "due_date": "2026-08-19T23:00:00-07:00",
+            "url": "https://forge.example/git/stackchain/dashboard/issues/12",
+        },
+        {
+            "repository": "stackchain/api",
+            "number": 7,
+            "title": "API release",
+            "due_date": "2026-08-20",
+            "url": "https://forge.example/git/stackchain/api/issues/7",
+        },
+    ]
+    source = f"""
+const calendar = require({json.dumps(str(AGENDA_CALENDAR))});
+const text = calendar.serializeAgendaCalendar({json.dumps(items)}, {{generatedOn:'20260818'}});
+process.stdout.write(JSON.stringify({{text}}));
+"""
+
+    text = run_node(source)["text"]
+    assert text.startswith("BEGIN:VCALENDAR\r\nVERSION:2.0\r\n")
+    assert text.endswith("END:VCALENDAR\r\n")
+    assert text.count("BEGIN:VEVENT") == 2
+    assert text.index("stackchain/dashboard#12") < text.index("stackchain/api#7")
+    assert "UID:issue-12@stackchain-dashboard" in text
+    assert "DTSTART;VALUE=DATE:20260819" in text
+    assert "SUMMARY:Plan\\, ship\\; verify\\\\path\\nnext" in text
+    assert "URL:https://forge.example/git/stackchain/dashboard/issues/12" in text
+    assert "DTSTAMP:20260818T000000Z" in text
+    assert "\n" not in text.replace("\r\n", "")
+
+
+def test_calendar_snapshot_folds_utf8_lines_to_rfc_octet_limit_without_splitting_characters():
+    item = {
+        "repository": "stackchain/dashboard",
+        "number": 99,
+        "title": "Launch 🚀 " + "é" * 60,
+        "due_date": "2026-08-21",
+        "url": "https://forge.example/git/stackchain/dashboard/issues/99",
+    }
+    source = f"""
+const calendar = require({json.dumps(str(AGENDA_CALENDAR))});
+const text = calendar.serializeAgendaCalendar([{json.dumps(item)}], {{generatedOn:'20260818'}});
+process.stdout.write(JSON.stringify({{text}}));
+"""
+
+    text = run_node(source)["text"]
+    physical_lines = text.split("\r\n")
+    assert all(len(line.encode("utf-8")) <= 75 for line in physical_lines)
+    assert any(line.startswith(" ") for line in physical_lines)
+    unfolded = text.replace("\r\n ", "")
+    assert "SUMMARY:Launch 🚀 " + "é" * 60 in unfolded
+
+
+def test_calendar_snapshot_prefers_native_file_share_and_falls_back_to_one_download():
+    source = f"""
+const calendar = require({json.dumps(str(AGENDA_CALENDAR))});
+class FakeFile {{ constructor(parts, name, options) {{ this.parts=parts; this.name=name; this.type=options.type; }} }}
+const shared=[];
+const nativeNavigator={{canShare:payload => payload.files[0].name.endsWith('.ics'), share:async payload => shared.push(payload)}};
+const clicks=[]; const revoked=[];
+const document={{createElement:() => ({{click(){{clicks.push({{download:this.download,href:this.href}})}}}})}};
+const urlApi={{createObjectURL:()=>'blob:agenda', revokeObjectURL:value=>revoked.push(value)}};
+(async () => {{
+  const native = await calendar.deliverCalendarSnapshot({{text:'BEGIN:VCALENDAR', filename:'stackchain-agenda.ics', navigator:nativeNavigator, document, urlApi, FileCtor:FakeFile}});
+  const fallback = await calendar.deliverCalendarSnapshot({{text:'BEGIN:VCALENDAR', filename:'stackchain-agenda.ics', navigator:{{}}, document, urlApi, FileCtor:FakeFile}});
+  process.stdout.write(JSON.stringify({{native,fallback,shared:shared.length,clicks,revoked}}));
+}})();
+"""
+
+    assert run_node(source) == {
+        "native": "shared",
+        "fallback": "downloaded",
+        "shared": 1,
+        "clicks": [{"download": "stackchain-agenda.ics", "href": "blob:agenda"}],
+        "revoked": ["blob:agenda"],
+    }
+
+
+@pytest.mark.anyio
+async def test_agenda_export_review_requires_selection_and_exposes_snapshot_privacy_boundary():
+    markup = INDEX.read_text()
+    source = await dashboard()
+    feature_source = source + AGENDA_CALENDAR.read_text()
+
+    assert 'id="open-agenda-export"' in markup
+    assert 'id="agenda-export-sheet"' in markup
+    assert 'id="agenda-export-items"' in markup
+    assert 'id="share-agenda-export"' in markup
+    assert "This exports a snapshot" in markup
+    assert "agendaMyWork(activeMyWork)" in feature_source
+    assert "checkbox.checked" in feature_source
+    assert "serializeAgendaCalendar(selected" in feature_source
+    assert "deliverCalendarSnapshot" in feature_source
+    assert "agenda-export-empty" in feature_source
diff --git a/tests/test_service_worker.py b/tests/test_service_worker.py
index 45580b6..d8206d4 100644
--- a/tests/test_service_worker.py
+++ b/tests/test_service_worker.py
@@ -1146,6 +1146,7 @@ def test_install_precaches_complete_subpath_scoped_app_shell():
         "/dashboard/static/offline-today.js",
         "/dashboard/static/my-work.js",
         "/dashboard/static/agenda-replan.js",
+        "/dashboard/static/agenda-calendar.js",
         "/dashboard/static/protect-today.js",
         "/dashboard/static/notification-undo.js",
         "/dashboard/static/card-planning.js",