diff --git a/app/src/components/settings/panels/TaskSourcesPanel.test.tsx b/app/src/components/settings/panels/TaskSourcesPanel.test.tsx
index 84b89244e..068fab6f3 100644
--- a/app/src/components/settings/panels/TaskSourcesPanel.test.tsx
+++ b/app/src/components/settings/panels/TaskSourcesPanel.test.tsx
@@ -20,6 +20,7 @@ const addMock = vi.fn();
 const updateMock = vi.fn();
 const removeMock = vi.fn();
 const fetchMock = vi.fn();
+const syncMock = vi.fn();
 const previewMock = vi.fn();
 
 vi.mock('../../../utils/tauriCommands', () => ({
@@ -29,6 +30,7 @@ vi.mock('../../../utils/tauriCommands', () => ({
   openhumanTaskSourcesUpdate: (id: string, patch: unknown) => updateMock(id, patch),
   openhumanTaskSourcesRemove: (id: string) => removeMock(id),
   openhumanTaskSourcesFetch: (id: string) => fetchMock(id),
+  openhumanTaskSourcesSync: () => syncMock(),
   openhumanTaskSourcesPreviewFilter: (...args: unknown[]) => previewMock(...args),
 }));
 
@@ -76,7 +78,11 @@ describe('<TaskSourcesPanel />', () => {
       fetched: 3,
       routed: 2,
       skippedDupe: 1,
+      pruned: 0,
     });
+    syncMock.mockResolvedValue([
+      { sourceId: 's-1', provider: 'github', fetched: 3, routed: 2, skippedDupe: 1, pruned: 1 },
+    ]);
     previewMock.mockResolvedValue([{ externalId: '1' }, { externalId: '2' }]);
   });
 
@@ -163,7 +169,40 @@ describe('<TaskSourcesPanel />', () => {
     const card = await screen.findByTestId('task-source-s-1');
     fireEvent.click(within(card).getByRole('button', { name: 'Fetch now' }));
     await waitFor(() => expect(fetchMock).toHaveBeenCalledWith('s-1'));
-    expect(await screen.findByText(/Routed 2 of 3 task\(s\)/)).toBeInTheDocument();
+    expect(
+      await screen.findByText(/Routed 2 of 3 task\(s\); removed 0 stale task\(s\)/)
+    ).toBeInTheDocument();
+  });
+
+  it('syncs all sources and surfaces routed/fetched/pruned counts', async () => {
+    renderPanel();
+    await screen.findByTestId('task-source-s-1');
+    fireEvent.click(screen.getByRole('button', { name: 'Sync all' }));
+    await waitFor(() => expect(syncMock).toHaveBeenCalled());
+    expect(
+      await screen.findByText(/Routed 2 of 3 task\(s\); removed 1 stale task\(s\)/)
+    ).toBeInTheDocument();
+  });
+
+  it('disables refresh while sync is in progress', async () => {
+    let resolveSync: (value: Awaited<ReturnType<typeof syncMock>>) => void = () => {};
+    syncMock.mockReturnValue(
+      new Promise(resolve => {
+        resolveSync = resolve;
+      })
+    );
+
+    renderPanel();
+    await screen.findByTestId('task-source-s-1');
+    fireEvent.click(screen.getByRole('button', { name: 'Sync all' }));
+
+    await waitFor(() => expect(syncMock).toHaveBeenCalled());
+    expect(screen.getByRole('button', { name: 'Refresh' })).toBeDisabled();
+
+    resolveSync([
+      { sourceId: 's-1', provider: 'github', fetched: 3, routed: 2, skippedDupe: 1, pruned: 1 },
+    ]);
+    await waitFor(() => expect(screen.getByRole('button', { name: 'Refresh' })).toBeEnabled());
   });
 
   it('surfaces a fetch outcome error', async () => {
@@ -173,6 +212,7 @@ describe('<TaskSourcesPanel />', () => {
       fetched: 0,
       routed: 0,
       skippedDupe: 0,
+      pruned: 0,
       error: 'no connection',
     });
     renderPanel();
diff --git a/app/src/components/settings/panels/TaskSourcesPanel.tsx b/app/src/components/settings/panels/TaskSourcesPanel.tsx
index 8f155e745..d6e376be7 100644
--- a/app/src/components/settings/panels/TaskSourcesPanel.tsx
+++ b/app/src/components/settings/panels/TaskSourcesPanel.tsx
@@ -1,4 +1,4 @@
-import { useCallback, useEffect, useMemo, useState } from 'react';
+import { useCallback, useEffect, useMemo, useRef, useState } from 'react';
 
 import { useT } from '../../../lib/i18n/I18nContext';
 import {
@@ -9,6 +9,7 @@ import {
   openhumanTaskSourcesPreviewFilter,
   openhumanTaskSourcesRemove,
   openhumanTaskSourcesStatus,
+  openhumanTaskSourcesSync,
   openhumanTaskSourcesUpdate,
   type TaskContainer,
   type TaskSource,
@@ -76,6 +77,21 @@ function buildFilter(
   }
 }
 
+function formatSyncNotice(outcomes: Array<{ fetched: number; routed: number; pruned?: number }>): {
+  fetched: number;
+  routed: number;
+  pruned: number;
+} {
+  return outcomes.reduce<{ fetched: number; routed: number; pruned: number }>(
+    (totals, outcome) => ({
+      fetched: totals.fetched + outcome.fetched,
+      routed: totals.routed + outcome.routed,
+      pruned: totals.pruned + (outcome.pruned ?? 0),
+    }),
+    { fetched: 0, routed: 0, pruned: 0 }
+  );
+}
+
 const TaskSourcesPanel = () => {
   const { t } = useT();
   const { navigateBack, breadcrumbs } = useSettingsNavigation();
@@ -86,6 +102,16 @@ const TaskSourcesPanel = () => {
   const [status, setStatus] = useState<TaskSourcesStatus | null>(null);
   const [busyKey, setBusyKey] = useState<string | null>(null);
   const [notice, setNotice] = useState<string | null>(null);
+  const loadingRef = useRef(loading);
+  const busyKeyRef = useRef(busyKey);
+
+  useEffect(() => {
+    loadingRef.current = loading;
+  }, [loading]);
+
+  useEffect(() => {
+    busyKeyRef.current = busyKey;
+  }, [busyKey]);
 
   // ── create-form state ────────────────────────────────────────────
   const [provider, setProvider] = useState<TaskSourceProvider>('github');
@@ -102,27 +128,31 @@ const TaskSourcesPanel = () => {
     setDatabases([]);
   }, [provider]);
 
-  const load = useCallback(async () => {
-    setLoading(true);
-    setError(null);
-    try {
-      const [list, stat] = await Promise.all([
-        openhumanTaskSourcesList(),
-        openhumanTaskSourcesStatus(),
-      ]);
-      setSources(list);
-      setStatus(stat);
-    } catch (err) {
-      setError(
-        `${t('settings.taskSources.loadError')}: ${err instanceof Error ? err.message : String(err)}`
-      );
-    } finally {
-      setLoading(false);
-    }
-  }, [t]);
+  const load = useCallback(
+    async (options?: { force?: boolean }) => {
+      if (!options?.force && (loadingRef.current || busyKeyRef.current !== null)) return;
+      setLoading(true);
+      setError(null);
+      try {
+        const [list, stat] = await Promise.all([
+          openhumanTaskSourcesList(),
+          openhumanTaskSourcesStatus(),
+        ]);
+        setSources(list);
+        setStatus(stat);
+      } catch (err) {
+        setError(
+          `${t('settings.taskSources.loadError')}: ${err instanceof Error ? err.message : String(err)}`
+        );
+      } finally {
+        setLoading(false);
+      }
+    },
+    [t]
+  );
 
   useEffect(() => {
-    void load();
+    void load({ force: true });
   }, [load]);
 
   const primaryLabel = useMemo(() => {
@@ -141,6 +171,7 @@ const TaskSourcesPanel = () => {
   }, [provider, t]);
 
   const addSource = async () => {
+    if (busyKey) return;
     setBusyKey('add');
     setError(null);
     setNotice(null);
@@ -153,7 +184,7 @@ const TaskSourcesPanel = () => {
       setName('');
       setPrimary('');
       setLabels('');
-      await load();
+      await load({ force: true });
     } catch (err) {
       setError(err instanceof Error ? err.message : String(err));
     } finally {
@@ -162,6 +193,7 @@ const TaskSourcesPanel = () => {
   };
 
   const previewFilter = async () => {
+    if (busyKey) return;
     setBusyKey('preview');
     setError(null);
     setNotice(null);
@@ -181,6 +213,7 @@ const TaskSourcesPanel = () => {
   // Fetch the databases the connected account exposes (Notion) so the user can
   // pick one instead of pasting a raw id.
   const browseDatabases = async () => {
+    if (busyKey) return;
     setBusyKey('databases');
     setError(null);
     setNotice(null);
@@ -198,6 +231,7 @@ const TaskSourcesPanel = () => {
   };
 
   const toggleSource = async (source: TaskSource) => {
+    if (busyKey) return;
     setBusyKey(`toggle:${source.id}`);
     setError(null);
     try {
@@ -211,6 +245,7 @@ const TaskSourcesPanel = () => {
   };
 
   const fetchNow = async (source: TaskSource) => {
+    if (busyKey) return;
     setBusyKey(`fetch:${source.id}`);
     setError(null);
     setNotice(null);
@@ -219,7 +254,7 @@ const TaskSourcesPanel = () => {
       // Refresh the source list first (updates lastFetchAt/lastStatus);
       // `load()` resets the error/notice, so set the outcome message
       // *after* it so the message isn't immediately cleared.
-      await load();
+      await load({ force: true });
       if (outcome.error) {
         setError(outcome.error);
       } else {
@@ -227,6 +262,34 @@ const TaskSourcesPanel = () => {
           t('settings.taskSources.fetchResult')
             .replace('{routed}', String(outcome.routed))
             .replace('{fetched}', String(outcome.fetched))
+            .replace('{pruned}', String(outcome.pruned ?? 0))
+        );
+      }
+    } catch (err) {
+      setError(err instanceof Error ? err.message : String(err));
+    } finally {
+      setBusyKey(null);
+    }
+  };
+
+  const syncAll = async () => {
+    if (busyKey) return;
+    setBusyKey('sync');
+    setError(null);
+    setNotice(null);
+    try {
+      const outcomes = await openhumanTaskSourcesSync();
+      await load({ force: true });
+      const firstError = outcomes.find(outcome => outcome.error)?.error;
+      if (firstError) {
+        setError(firstError);
+      } else {
+        const totals = formatSyncNotice(outcomes);
+        setNotice(
+          t('settings.taskSources.fetchResult')
+            .replace('{routed}', String(totals.routed))
+            .replace('{fetched}', String(totals.fetched))
+            .replace('{pruned}', String(totals.pruned))
         );
       }
     } catch (err) {
@@ -237,6 +300,7 @@ const TaskSourcesPanel = () => {
   };
 
   const removeSource = async (source: TaskSource) => {
+    if (busyKey) return;
     if (!window.confirm(t('settings.taskSources.removeConfirm'))) return;
     setBusyKey(`remove:${source.id}`);
     setError(null);
@@ -331,7 +395,7 @@ const TaskSourcesPanel = () => {
               <button
                 type="button"
                 className="btn btn-outline btn-sm"
-                disabled={busyKey === 'databases'}
+                disabled={busyKey !== null}
                 onClick={() => void browseDatabases()}>
                 {busyKey === 'databases'
                   ? t('settings.taskSources.notion.loadingDatabases')
@@ -378,14 +442,14 @@ const TaskSourcesPanel = () => {
             <button
               type="button"
               className="btn btn-primary btn-sm"
-              disabled={busyKey === 'add'}
+              disabled={busyKey !== null}
               onClick={() => void addSource()}>
               {busyKey === 'add' ? t('settings.taskSources.adding') : t('settings.taskSources.add')}
             </button>
             <button
               type="button"
               className="btn btn-outline btn-sm"
-              disabled={busyKey === 'preview'}
+              disabled={busyKey !== null}
               onClick={() => void previewFilter()}>
               {t('settings.taskSources.preview')}
             </button>
@@ -397,6 +461,15 @@ const TaskSourcesPanel = () => {
           <h3 className="text-sm font-semibold text-stone-900 dark:text-neutral-100">
             {t('settings.taskSources.configured')}
           </h3>
+          <button
+            type="button"
+            className="btn btn-outline btn-sm"
+            disabled={loading || busyKey !== null || sources.length === 0}
+            onClick={() => void syncAll()}>
+            {busyKey === 'sync'
+              ? t('settings.taskSources.syncing')
+              : t('settings.taskSources.syncAll')}
+          </button>
 
           {loading ? (
             <p className="text-sm text-stone-400 dark:text-neutral-500">{t('common.loading')}</p>
@@ -445,7 +518,7 @@ const TaskSourcesPanel = () => {
                     <button
                       type="button"
                       className="btn btn-outline btn-xs"
-                      disabled={busyKey === `toggle:${source.id}`}
+                      disabled={busyKey !== null}
                       onClick={() => void toggleSource(source)}>
                       {source.enabled
                         ? t('settings.taskSources.disable')
@@ -454,7 +527,7 @@ const TaskSourcesPanel = () => {
                     <button
                       type="button"
                       className="btn btn-outline btn-xs"
-                      disabled={busyKey === `fetch:${source.id}`}
+                      disabled={busyKey !== null}
                       onClick={() => void fetchNow(source)}>
                       {busyKey === `fetch:${source.id}`
                         ? t('settings.taskSources.fetching')
@@ -463,7 +536,7 @@ const TaskSourcesPanel = () => {
                     <button
                       type="button"
                       className="btn btn-ghost btn-xs text-red-600 dark:text-red-400"
-                      disabled={busyKey === `remove:${source.id}`}
+                      disabled={busyKey !== null}
                       onClick={() => void removeSource(source)}>
                       {t('settings.taskSources.remove')}
                     </button>
@@ -473,7 +546,11 @@ const TaskSourcesPanel = () => {
             </ul>
           )}
 
-          <button type="button" className="btn btn-ghost btn-sm" onClick={() => void load()}>
+          <button
+            type="button"
+            className="btn btn-ghost btn-sm"
+            disabled={loading || busyKey !== null}
+            onClick={() => void load()}>
             {t('settings.taskSources.refresh')}
           </button>
         </section>
diff --git a/app/src/lib/i18n/ar.ts b/app/src/lib/i18n/ar.ts
index 8c0846999..ae9c03912 100644
--- a/app/src/lib/i18n/ar.ts
+++ b/app/src/lib/i18n/ar.ts
@@ -4393,7 +4393,10 @@ const messages: TranslationMap = {
   'settings.taskSources.previewResult': 'مُهمة (مُهمات) مُطابقة لهذا التصفية',
   'settings.taskSources.fetchNow': 'أحضر الآن',
   'settings.taskSources.fetching': '....',
-  'settings.taskSources.fetchResult': 'تم توجيه {routed} من أصل {fetched} مهمة/مهام',
+  'settings.taskSources.fetchResult':
+    'تم توجيه {routed} من أصل {fetched} مهمة/مهام؛ تمت إزالة {pruned} مهمة/مهام قديمة',
+  'settings.taskSources.syncAll': 'مزامنة الكل',
+  'settings.taskSources.syncing': 'جارٍ المزامنة…',
   'settings.taskSources.configured': 'المصادر المحظورة',
   'settings.taskSources.empty': 'لم يتم تشكيل مصادر المهمة بعد',
   'settings.taskSources.proactive': 'استباقي',
diff --git a/app/src/lib/i18n/bn.ts b/app/src/lib/i18n/bn.ts
index afae9c167..36a446241 100644
--- a/app/src/lib/i18n/bn.ts
+++ b/app/src/lib/i18n/bn.ts
@@ -4475,7 +4475,10 @@ const messages: TranslationMap = {
   'settings.taskSources.previewResult': 'এই ফিল্টারের জন্য xqxqx প্রচেষ্টা করুন',
   'settings.taskSources.fetchNow': 'এখন নিয়ে এসো',
   'settings.taskSources.fetching': 'প্রাপ্ত করা হচ্ছে...',
-  'settings.taskSources.fetchResult': 'xxqxqx এর রুট',
+  'settings.taskSources.fetchResult':
+    '{fetched}টি কাজের মধ্যে {routed}টি রাউট করা হয়েছে; {pruned}টি পুরোনো কাজ সরানো হয়েছে',
+  'settings.taskSources.syncAll': 'সব সিঙ্ক করুন',
+  'settings.taskSources.syncing': 'সিঙ্ক হচ্ছে...',
   'settings.taskSources.configured': '%d-টি উৎসস্থল কনফিগার করুন',
   'settings.taskSources.empty': 'কোনো কর্ম কনফিগার করা হয়নি।',
   'settings.taskSources.proactive': 'আকর্ষণীয়',
diff --git a/app/src/lib/i18n/de.ts b/app/src/lib/i18n/de.ts
index fcc7b551c..61182c40e 100644
--- a/app/src/lib/i18n/de.ts
+++ b/app/src/lib/i18n/de.ts
@@ -4597,7 +4597,10 @@ const messages: TranslationMap = {
   'settings.taskSources.previewResult': '{count}-Aufgabe(n) entsprechen diesem Filter',
   'settings.taskSources.fetchNow': 'Jetzt abholen',
   'settings.taskSources.fetching': 'Abrufen…',
-  'settings.taskSources.fetchResult': 'Gerouteter {routed} von {fetched}-Aufgabe(n)',
+  'settings.taskSources.fetchResult':
+    '{routed} von {fetched} Aufgabe(n) weitergeleitet; {pruned} veraltete Aufgabe(n) entfernt',
+  'settings.taskSources.syncAll': 'Alle synchronisieren',
+  'settings.taskSources.syncing': 'Synchronisierung…',
   'settings.taskSources.configured': 'Konfigurierte Quellen',
   'settings.taskSources.empty': 'Noch keine Aufgabenquellen konfiguriert.',
   'settings.taskSources.proactive': 'Proaktiv',
diff --git a/app/src/lib/i18n/en.ts b/app/src/lib/i18n/en.ts
index fa7d15d56..ddbdbca27 100644
--- a/app/src/lib/i18n/en.ts
+++ b/app/src/lib/i18n/en.ts
@@ -5014,7 +5014,10 @@ const en: TranslationMap = {
   'settings.taskSources.previewResult': '{count} task(s) match this filter',
   'settings.taskSources.fetchNow': 'Fetch now',
   'settings.taskSources.fetching': 'Fetching…',
-  'settings.taskSources.fetchResult': 'Routed {routed} of {fetched} task(s)',
+  'settings.taskSources.fetchResult':
+    'Routed {routed} of {fetched} task(s); removed {pruned} stale task(s)',
+  'settings.taskSources.syncAll': 'Sync all',
+  'settings.taskSources.syncing': 'Syncing…',
   'settings.taskSources.configured': 'Configured sources',
   'settings.taskSources.empty': 'No task sources configured yet.',
   'settings.taskSources.proactive': 'Proactive',
diff --git a/app/src/lib/i18n/es.ts b/app/src/lib/i18n/es.ts
index 2506c6d9f..2ae302ab8 100644
--- a/app/src/lib/i18n/es.ts
+++ b/app/src/lib/i18n/es.ts
@@ -4567,7 +4567,10 @@ const messages: TranslationMap = {
   'settings.taskSources.previewResult': 'La(s) tarea(s) {count} coinciden con este filtro',
   'settings.taskSources.fetchNow': 'Trae ahora',
   'settings.taskSources.fetching': 'Obteniendo…',
-  'settings.taskSources.fetchResult': 'Enrutado {routed} de la(s) tarea(s) {fetched}',
+  'settings.taskSources.fetchResult':
+    'Se enrutaron {routed} de {fetched} tarea(s); se eliminaron {pruned} tarea(s) obsoletas',
+  'settings.taskSources.syncAll': 'Sincronizar todo',
+  'settings.taskSources.syncing': 'Sincronizando…',
   'settings.taskSources.configured': 'Fuentes configuradas',
   'settings.taskSources.empty': 'Aún no se han configurado fuentes de tareas.',
   'settings.taskSources.proactive': 'proactivo',
diff --git a/app/src/lib/i18n/fr.ts b/app/src/lib/i18n/fr.ts
index 9e7c5d719..454b06080 100644
--- a/app/src/lib/i18n/fr.ts
+++ b/app/src/lib/i18n/fr.ts
@@ -4581,7 +4581,10 @@ const messages: TranslationMap = {
   'settings.taskSources.previewResult': 'La ou les tâches {count} correspondent à ce filtre',
   'settings.taskSources.fetchNow': 'Ramasse maintenant',
   'settings.taskSources.fetching': 'Récupération…',
-  'settings.taskSources.fetchResult': 'Acheminé {routed} des tâches {fetched}',
+  'settings.taskSources.fetchResult':
+    '{routed} tâche(s) acheminée(s) sur {fetched}; {pruned} tâche(s) obsolète(s) supprimée(s)',
+  'settings.taskSources.syncAll': 'Tout synchroniser',
+  'settings.taskSources.syncing': 'Synchronisation…',
   'settings.taskSources.configured': 'Sources configurées',
   'settings.taskSources.empty': 'Aucune source de tâche configurée pour le moment.',
   'settings.taskSources.proactive': 'proactif',
diff --git a/app/src/lib/i18n/hi.ts b/app/src/lib/i18n/hi.ts
index 7934a8436..90fc36dc7 100644
--- a/app/src/lib/i18n/hi.ts
+++ b/app/src/lib/i18n/hi.ts
@@ -4485,7 +4485,10 @@ const messages: TranslationMap = {
   'settings.taskSources.previewResult': '{count} कार्य इस फ़िल्टर से मेल खाता है',
   'settings.taskSources.fetchNow': 'अभी लेना',
   'settings.taskSources.fetching': '...',
-  'settings.taskSources.fetchResult': '{fetched} कार्य (s) के रूटेड {routed}',
+  'settings.taskSources.fetchResult':
+    '{fetched} कार्यों में से {routed} रूट किए गए; {pruned} पुराने कार्य हटाए गए',
+  'settings.taskSources.syncAll': 'सभी सिंक करें',
+  'settings.taskSources.syncing': 'सिंक हो रहा है...',
   'settings.taskSources.configured': 'संरूपित सूत्र',
   'settings.taskSources.empty': 'अभी तक कोई कार्य स्रोत नहीं है।',
   'settings.taskSources.proactive': 'सक्रिय',
diff --git a/app/src/lib/i18n/id.ts b/app/src/lib/i18n/id.ts
index 5f7ed0d5d..123674527 100644
--- a/app/src/lib/i18n/id.ts
+++ b/app/src/lib/i18n/id.ts
@@ -4493,7 +4493,10 @@ const messages: TranslationMap = {
   'settings.taskSources.previewResult': 'Tugas {count} cocok dengan penyaring ini',
   'settings.taskSources.fetchNow': 'Ambil sekarang',
   'settings.taskSources.fetching': 'Mengambil...',
-  'settings.taskSources.fetchResult': 'Karang tugas {routed} dari {fetched}',
+  'settings.taskSources.fetchResult':
+    'Merutekan {routed} dari {fetched} tugas; menghapus {pruned} tugas usang',
+  'settings.taskSources.syncAll': 'Sinkronkan semua',
+  'settings.taskSources.syncing': 'Menyinkronkan...',
   'settings.taskSources.configured': 'Sumber yang dikonfigurasi',
   'settings.taskSources.empty': 'Belum ada sumber tugas yang dikonfigurasi.',
   'settings.taskSources.proactive': 'Proaktif',
diff --git a/app/src/lib/i18n/it.ts b/app/src/lib/i18n/it.ts
index dfbc51566..03454a154 100644
--- a/app/src/lib/i18n/it.ts
+++ b/app/src/lib/i18n/it.ts
@@ -4558,7 +4558,10 @@ const messages: TranslationMap = {
   'settings.taskSources.previewResult': 'Il/i compito/i {count} corrispondono a questo filtro',
   'settings.taskSources.fetchNow': 'Prendi adesso',
   'settings.taskSources.fetching': 'Recupero…',
-  'settings.taskSources.fetchResult': 'Instradato {routed} di {fetched} attività',
+  'settings.taskSources.fetchResult':
+    'Instradate {routed} di {fetched} attività; rimosse {pruned} attività obsolete',
+  'settings.taskSources.syncAll': 'Sincronizza tutto',
+  'settings.taskSources.syncing': 'Sincronizzazione…',
   'settings.taskSources.configured': 'Fonti configurate',
   'settings.taskSources.empty': 'Nessuna fonte attività configurata ancora.',
   'settings.taskSources.proactive': 'Proattivo',
diff --git a/app/src/lib/i18n/ko.ts b/app/src/lib/i18n/ko.ts
index cb52fba9d..3b447915a 100644
--- a/app/src/lib/i18n/ko.ts
+++ b/app/src/lib/i18n/ko.ts
@@ -4434,7 +4434,10 @@ const messages: TranslationMap = {
   'settings.taskSources.previewResult': '{count}개 작업이 이 필터와 일치합니다',
   'settings.taskSources.fetchNow': '지금 가져오기',
   'settings.taskSources.fetching': '가져오는 중…',
-  'settings.taskSources.fetchResult': '{fetched}개 작업 중 {routed}개 라우팅됨',
+  'settings.taskSources.fetchResult':
+    '{fetched}개 작업 중 {routed}개 라우팅됨; 오래된 작업 {pruned}개 제거됨',
+  'settings.taskSources.syncAll': '모두 동기화',
+  'settings.taskSources.syncing': '동기화 중…',
   'settings.taskSources.configured': '구성된 소스',
   'settings.taskSources.empty': '아직 구성된 작업 소스가 없습니다.',
   'settings.taskSources.proactive': '능동형',
diff --git a/app/src/lib/i18n/pl.ts b/app/src/lib/i18n/pl.ts
index 13d1a5388..d1c1155e1 100644
--- a/app/src/lib/i18n/pl.ts
+++ b/app/src/lib/i18n/pl.ts
@@ -4554,7 +4554,10 @@ const messages: TranslationMap = {
   'settings.taskSources.previewResult': '{count} zadań pasuje do tego filtra',
   'settings.taskSources.fetchNow': 'Pobierz teraz',
   'settings.taskSources.fetching': 'Pobieranie…',
-  'settings.taskSources.fetchResult': 'Skierowano {routed} z {fetched} zadań',
+  'settings.taskSources.fetchResult':
+    'Skierowano {routed} z {fetched} zadań; usunięto {pruned} nieaktualnych zadań',
+  'settings.taskSources.syncAll': 'Synchronizuj wszystko',
+  'settings.taskSources.syncing': 'Synchronizowanie…',
   'settings.taskSources.configured': 'Skonfigurowane źródła',
   'settings.taskSources.empty': 'Nie skonfigurowano jeszcze źródeł zadań.',
   'settings.taskSources.proactive': 'Proaktywne',
diff --git a/app/src/lib/i18n/pt.ts b/app/src/lib/i18n/pt.ts
index 17fb8c678..880558f4b 100644
--- a/app/src/lib/i18n/pt.ts
+++ b/app/src/lib/i18n/pt.ts
@@ -4554,7 +4554,10 @@ const messages: TranslationMap = {
   'settings.taskSources.previewResult': 'A tarefa(s) {count} corresponde(m) a este filtro',
   'settings.taskSources.fetchNow': 'Buscar agora',
   'settings.taskSources.fetching': 'Buscando…',
-  'settings.taskSources.fetchResult': 'Roteado {routed} de {fetched} tarefa(s)',
+  'settings.taskSources.fetchResult':
+    'Roteado {routed} de {fetched} tarefa(s); removidas {pruned} tarefa(s) antigas',
+  'settings.taskSources.syncAll': 'Sincronizar tudo',
+  'settings.taskSources.syncing': 'Sincronizando…',
   'settings.taskSources.configured': 'Fontes configuradas',
   'settings.taskSources.empty': 'Nenhuma fonte de tarefa configurada ainda.',
   'settings.taskSources.proactive': 'Proativo',
diff --git a/app/src/lib/i18n/ru.ts b/app/src/lib/i18n/ru.ts
index c53425cda..8f45117ef 100644
--- a/app/src/lib/i18n/ru.ts
+++ b/app/src/lib/i18n/ru.ts
@@ -4520,7 +4520,10 @@ const messages: TranslationMap = {
   'settings.taskSources.previewResult': 'Задачи {count} соответствуют этому фильтру',
   'settings.taskSources.fetchNow': 'Получить сейчас',
   'settings.taskSources.fetching': 'Получение…',
-  'settings.taskSources.fetchResult': 'Маршрутизация {routed} из задач {fetched}',
+  'settings.taskSources.fetchResult':
+    'Направлено {routed} из {fetched} задач; удалено устаревших задач: {pruned}',
+  'settings.taskSources.syncAll': 'Синхронизировать все',
+  'settings.taskSources.syncing': 'Синхронизация…',
   'settings.taskSources.configured': 'Настроенные источники',
   'settings.taskSources.empty': 'Источники задач пока не настроены.',
   'settings.taskSources.proactive': 'Проактивный',
diff --git a/app/src/lib/i18n/zh-CN.ts b/app/src/lib/i18n/zh-CN.ts
index d42e323ce..a2b9e6984 100644
--- a/app/src/lib/i18n/zh-CN.ts
+++ b/app/src/lib/i18n/zh-CN.ts
@@ -4258,7 +4258,10 @@ const messages: TranslationMap = {
   'settings.taskSources.previewResult': '{count} 个任务匹配此筛选器',
   'settings.taskSources.fetchNow': '立即获取',
   'settings.taskSources.fetching': '获取中…',
-  'settings.taskSources.fetchResult': '已路由 {routed}/{fetched} 个任务',
+  'settings.taskSources.fetchResult':
+    '已路由 {routed}/{fetched} 个任务；已移除 {pruned} 个过期任务',
+  'settings.taskSources.syncAll': '全部同步',
+  'settings.taskSources.syncing': '正在同步…',
   'settings.taskSources.configured': '已配置来源',
   'settings.taskSources.empty': '尚未配置任务来源。',
   'settings.taskSources.proactive': '主动',
diff --git a/app/src/pages/conversations/components/TaskKanbanBoard.test.tsx b/app/src/pages/conversations/components/TaskKanbanBoard.test.tsx
index 6cdfebc04..13da4d072 100644
--- a/app/src/pages/conversations/components/TaskKanbanBoard.test.tsx
+++ b/app/src/pages/conversations/components/TaskKanbanBoard.test.tsx
@@ -7,6 +7,7 @@ import {
   openhumanTaskSourcesFetch,
   openhumanTaskSourcesList,
   openhumanTaskSourcesStatus,
+  openhumanTaskSourcesSync,
   openhumanTaskSourcesUpdate,
 } from '../../../utils/tauriCommands';
 import { TaskKanbanBoard } from './TaskKanbanBoard';
@@ -18,6 +19,7 @@ vi.mock('../../../utils/tauriCommands', () => ({
   openhumanTaskSourcesFetch: vi.fn(),
   openhumanTaskSourcesList: vi.fn(),
   openhumanTaskSourcesStatus: vi.fn(),
+  openhumanTaskSourcesSync: vi.fn(),
   openhumanTaskSourcesUpdate: vi.fn(),
 }));
 
@@ -73,7 +75,11 @@ describe('TaskKanbanBoard approval surface', () => {
       fetched: 3,
       routed: 2,
       skippedDupe: 1,
+      pruned: 0,
     });
+    vi.mocked(openhumanTaskSourcesSync).mockResolvedValue([
+      { sourceId: 'src-1', provider: 'github', fetched: 3, routed: 2, skippedDupe: 1, pruned: 1 },
+    ]);
     vi.mocked(openhumanTaskSourcesUpdate).mockResolvedValue({
       id: 'src-1',
       provider: 'github',
@@ -186,6 +192,9 @@ describe('TaskKanbanBoard approval surface', () => {
     fireEvent.click(screen.getByText('settings.taskSources.fetchNow'));
     await waitFor(() => expect(openhumanTaskSourcesFetch).toHaveBeenCalledWith('src-1'));
 
+    fireEvent.click(screen.getByText('settings.taskSources.syncAll'));
+    await waitFor(() => expect(openhumanTaskSourcesSync).toHaveBeenCalled());
+
     fireEvent.click(screen.getByText('settings.taskSources.disable'));
     await waitFor(() =>
       expect(openhumanTaskSourcesUpdate).toHaveBeenCalledWith('src-1', { enabled: false })
diff --git a/app/src/pages/conversations/components/TaskKanbanBoard.tsx b/app/src/pages/conversations/components/TaskKanbanBoard.tsx
index f33c70fd1..053148ea1 100644
--- a/app/src/pages/conversations/components/TaskKanbanBoard.tsx
+++ b/app/src/pages/conversations/components/TaskKanbanBoard.tsx
@@ -23,6 +23,7 @@ import {
   openhumanTaskSourcesFetch,
   openhumanTaskSourcesList,
   openhumanTaskSourcesStatus,
+  openhumanTaskSourcesSync,
   openhumanTaskSourcesUpdate,
   type TaskSource,
   type TaskSourcesStatus,
@@ -569,7 +570,23 @@ function formatUrgency(
 function formatFetchNotice(outcome: FetchOutcome, t: (key: string) => string): string {
   return t('settings.taskSources.fetchResult')
     .replace('{routed}', String(outcome.routed))
-    .replace('{fetched}', String(outcome.fetched));
+    .replace('{fetched}', String(outcome.fetched))
+    .replace('{pruned}', String(outcome.pruned ?? 0));
+}
+
+function formatSyncNotice(outcomes: FetchOutcome[], t: (key: string) => string): string {
+  const totals = outcomes.reduce(
+    (acc, outcome) => ({
+      fetched: acc.fetched + outcome.fetched,
+      routed: acc.routed + outcome.routed,
+      pruned: acc.pruned + (outcome.pruned ?? 0),
+    }),
+    { fetched: 0, routed: 0, pruned: 0 }
+  );
+  return t('settings.taskSources.fetchResult')
+    .replace('{routed}', String(totals.routed))
+    .replace('{fetched}', String(totals.fetched))
+    .replace('{pruned}', String(totals.pruned));
 }
 
 function TaskSourceControls({ disabled, compact }: { disabled: boolean; compact: boolean }) {
@@ -614,6 +631,7 @@ function TaskSourceControls({ disabled, compact }: { disabled: boolean; compact:
   }, [load]);
 
   const toggleSource = async (source: TaskSource) => {
+    if (busyKey) return;
     setBusyKey(`toggle:${source.id}`);
     setError(null);
     setNotice(null);
@@ -628,6 +646,7 @@ function TaskSourceControls({ disabled, compact }: { disabled: boolean; compact:
   };
 
   const fetchSource = async (source: TaskSource) => {
+    if (busyKey) return;
     setBusyKey(`fetch:${source.id}`);
     setError(null);
     setNotice(null);
@@ -646,6 +665,27 @@ function TaskSourceControls({ disabled, compact }: { disabled: boolean; compact:
     }
   };
 
+  const syncSources = async () => {
+    if (busyKey) return;
+    setBusyKey('sync');
+    setError(null);
+    setNotice(null);
+    try {
+      const outcomes = await openhumanTaskSourcesSync();
+      await load();
+      const firstError = outcomes.find(outcome => outcome.error)?.error;
+      if (firstError) {
+        setError(firstError);
+      } else {
+        setNotice(formatSyncNotice(outcomes, t));
+      }
+    } catch (err) {
+      setError(err instanceof Error ? err.message : String(err));
+    } finally {
+      setBusyKey(null);
+    }
+  };
+
   return (
     <section className="mb-3 rounded-lg border border-stone-200 bg-white p-3 dark:border-neutral-800 dark:bg-neutral-900">
       <div className="flex flex-wrap items-center justify-between gap-2">
@@ -668,6 +708,16 @@ function TaskSourceControls({ disabled, compact }: { disabled: boolean; compact:
             className="text-[11px] font-medium text-ocean-600 hover:text-ocean-700 dark:text-ocean-300 dark:hover:text-ocean-200">
             {t('conversations.taskKanban.sources.manage')}
           </button>
+          <button
+            type="button"
+            disabled={disabled || loading || busyKey !== null || sources.length === 0}
+            onClick={() => void syncSources()}
+            className="inline-flex items-center gap-1 rounded-md border border-stone-200 px-2 py-1 text-[11px] font-medium text-stone-600 hover:bg-stone-50 disabled:opacity-40 dark:border-neutral-800 dark:text-neutral-300 dark:hover:bg-neutral-800">
+            <LuRefreshCw className="h-3 w-3" />
+            {busyKey === 'sync'
+              ? t('settings.taskSources.syncing')
+              : t('settings.taskSources.syncAll')}
+          </button>
           <button
             type="button"
             aria-label={t('settings.taskSources.refresh')}
@@ -728,7 +778,7 @@ function TaskSourceControls({ disabled, compact }: { disabled: boolean; compact:
               <div className="mt-2 flex flex-wrap gap-1.5">
                 <button
                   type="button"
-                  disabled={disabled || busyKey === `fetch:${source.id}`}
+                  disabled={disabled || busyKey !== null}
                   onClick={() => void fetchSource(source)}
                   className="inline-flex items-center gap-1 rounded-md border border-stone-200 px-2 py-1 text-[11px] font-medium text-stone-600 hover:bg-stone-50 disabled:opacity-40 dark:border-neutral-800 dark:text-neutral-300 dark:hover:bg-neutral-800">
                   <LuRefreshCw className="h-3 w-3" />
@@ -738,7 +788,7 @@ function TaskSourceControls({ disabled, compact }: { disabled: boolean; compact:
                 </button>
                 <button
                   type="button"
-                  disabled={disabled || busyKey === `toggle:${source.id}`}
+                  disabled={disabled || busyKey !== null}
                   onClick={() => void toggleSource(source)}
                   className="rounded-md border border-stone-200 px-2 py-1 text-[11px] font-medium text-stone-600 hover:bg-stone-50 disabled:opacity-40 dark:border-neutral-800 dark:text-neutral-300 dark:hover:bg-neutral-800">
                   {source.enabled
diff --git a/app/src/utils/tauriCommands/taskSources.test.ts b/app/src/utils/tauriCommands/taskSources.test.ts
index ee122d121..71e64e3f9 100644
--- a/app/src/utils/tauriCommands/taskSources.test.ts
+++ b/app/src/utils/tauriCommands/taskSources.test.ts
@@ -19,6 +19,7 @@ import {
   openhumanTaskSourcesPreviewFilter,
   openhumanTaskSourcesRemove,
   openhumanTaskSourcesStatus,
+  openhumanTaskSourcesSync,
   openhumanTaskSourcesUpdate,
 } from './taskSources';
 
@@ -87,6 +88,12 @@ describe('tauriCommands/taskSources', () => {
     });
   });
 
+  test('sync forwards the sync method with no params', async () => {
+    mockCallCoreRpc.mockResolvedValue([]);
+    await openhumanTaskSourcesSync();
+    expect(mockCallCoreRpc).toHaveBeenCalledWith({ method: 'openhuman.task_sources_sync' });
+  });
+
   test('listTasks forwards id + default limit', async () => {
     mockCallCoreRpc.mockResolvedValue([]);
     await openhumanTaskSourcesListTasks('s-1');
@@ -139,6 +146,7 @@ describe('tauriCommands/taskSources', () => {
     await expect(openhumanTaskSourcesUpdate('x', {})).rejects.toThrow('Not running in Tauri');
     await expect(openhumanTaskSourcesRemove('x')).rejects.toThrow('Not running in Tauri');
     await expect(openhumanTaskSourcesFetch('x')).rejects.toThrow('Not running in Tauri');
+    await expect(openhumanTaskSourcesSync()).rejects.toThrow('Not running in Tauri');
     await expect(openhumanTaskSourcesListTasks('x')).rejects.toThrow('Not running in Tauri');
     await expect(
       openhumanTaskSourcesPreviewFilter('github', { provider: 'github' })
diff --git a/app/src/utils/tauriCommands/taskSources.ts b/app/src/utils/tauriCommands/taskSources.ts
index 3df60d45c..a94946da9 100644
--- a/app/src/utils/tauriCommands/taskSources.ts
+++ b/app/src/utils/tauriCommands/taskSources.ts
@@ -92,6 +92,7 @@ export interface FetchOutcome {
   fetched: number;
   routed: number;
   skippedDupe: number;
+  pruned: number;
   error?: string;
 }
 
@@ -162,9 +163,9 @@ export async function openhumanTaskSourcesUpdate(
 
 export async function openhumanTaskSourcesRemove(
   id: string
-): Promise<{ id: string; removed: boolean }> {
+): Promise<{ id: string; removed: boolean; pruned?: number }> {
   ensureTauri();
-  return await callCoreRpc<{ id: string; removed: boolean }>({
+  return await callCoreRpc<{ id: string; removed: boolean; pruned?: number }>({
     method: 'openhuman.task_sources_remove',
     params: { id },
   });
@@ -178,6 +179,11 @@ export async function openhumanTaskSourcesFetch(id: string): Promise<FetchOutcom
   });
 }
 
+export async function openhumanTaskSourcesSync(): Promise<FetchOutcome[]> {
+  ensureTauri();
+  return await callCoreRpc<FetchOutcome[]>({ method: 'openhuman.task_sources_sync' });
+}
+
 export async function openhumanTaskSourcesListTasks(
   id: string,
   limit = 50
diff --git a/src/openhuman/task_sources/ops.rs b/src/openhuman/task_sources/ops.rs
index 13142552c..29ac1dbce 100644
--- a/src/openhuman/task_sources/ops.rs
+++ b/src/openhuman/task_sources/ops.rs
@@ -18,7 +18,7 @@ use crate::rpc::RpcOutcome;
 use super::types::{
     FetchReason, FilterSpec, ProviderSlug, SourceTarget, TaskSource, TaskSourcePatch,
 };
-use super::{filter, pipeline, store};
+use super::{filter, pipeline, route, store};
 
 /// List all configured task sources.
 pub async fn list(config: &Config) -> Result<RpcOutcome<Vec<TaskSource>>, String> {
@@ -104,10 +104,20 @@ pub async fn update(
 
 /// Remove a source by id.
 pub async fn remove(config: &Config, id: &str) -> Result<RpcOutcome<Value>, String> {
+    let ingested = store::list_ingested_refs(config, id).map_err(|e| e.to_string())?;
+    let mut pruned = 0usize;
+    for item in ingested {
+        if let Some(card_id) = item.card_id.as_deref().filter(|id| !id.trim().is_empty()) {
+            route::remove_card(config, card_id)?;
+        }
+        if store::remove_ingested(config, id, &item.external_id).map_err(|e| e.to_string())? {
+            pruned += 1;
+        }
+    }
     store::remove_source(config, id).map_err(|e| e.to_string())?;
-    tracing::debug!(source_id = %id, "[task_sources:ops] removed");
+    tracing::debug!(source_id = %id, pruned, "[task_sources:ops] removed");
     Ok(RpcOutcome::new(
-        json!({ "id": id, "removed": true }),
+        json!({ "id": id, "removed": true, "pruned": pruned }),
         vec![],
     ))
 }
@@ -119,6 +129,26 @@ pub async fn fetch(config: &Config, id: &str) -> Result<RpcOutcome<super::FetchO
     Ok(RpcOutcome::new(outcome, vec![]))
 }
 
+/// Manually sync all enabled task sources now.
+pub async fn sync(config: &Config) -> Result<RpcOutcome<Vec<super::FetchOutcome>>, String> {
+    let sources = store::list_sources(config).map_err(|e| e.to_string())?;
+    let mut outcomes = Vec::new();
+    for source in sources.into_iter().filter(|source| source.enabled) {
+        outcomes.push(pipeline::run_source_once(config, &source, FetchReason::Manual).await);
+    }
+    tracing::info!(
+        source_count = outcomes.len(),
+        fetched = outcomes
+            .iter()
+            .map(|outcome| outcome.fetched)
+            .sum::<usize>(),
+        routed = outcomes.iter().map(|outcome| outcome.routed).sum::<usize>(),
+        pruned = outcomes.iter().map(|outcome| outcome.pruned).sum::<usize>(),
+        "[task_sources:ops] sync completed"
+    );
+    Ok(RpcOutcome::new(outcomes, vec![]))
+}
+
 /// Recently ingested tasks for a source (newest first).
 pub async fn list_tasks(
     config: &Config,
diff --git a/src/openhuman/task_sources/pipeline.rs b/src/openhuman/task_sources/pipeline.rs
index df18e4971..10ee7e87b 100644
--- a/src/openhuman/task_sources/pipeline.rs
+++ b/src/openhuman/task_sources/pipeline.rs
@@ -9,6 +9,7 @@
 use std::sync::Arc;
 
 use chrono::Utc;
+use std::collections::HashSet;
 
 use crate::core::event_bus::{publish_global, DomainEvent};
 use crate::openhuman::config::Config;
@@ -40,8 +41,8 @@ pub async fn run_source_once(
     match run_inner(config, source, reason, &mut outcome).await {
         Ok(()) => {
             let status = format!(
-                "fetched {} routed {} dupes {}",
-                outcome.fetched, outcome.routed, outcome.skipped_dupe
+                "fetched {} routed {} dupes {} pruned {}",
+                outcome.fetched, outcome.routed, outcome.skipped_dupe, outcome.pruned
             );
             let _ = store::record_fetch(config, &source.id, Utc::now(), reason, &status);
             publish_global(DomainEvent::TaskSourceFetched {
@@ -56,6 +57,7 @@ pub async fn run_source_once(
                 fetched = outcome.fetched,
                 routed = outcome.routed,
                 skipped_dupe = outcome.skipped_dupe,
+                pruned = outcome.pruned,
                 "[task_sources:pipeline] fetch pass complete"
             );
         }
@@ -109,6 +111,8 @@ async fn run_inner(
     let fetch_filter = filter::to_fetch_filter(&source.filter, source.max_tasks_per_fetch);
     let tasks = provider.fetch_tasks(&ctx, &fetch_filter).await?;
     outcome.fetched = tasks.len();
+    let current_external_ids: HashSet<String> =
+        tasks.iter().map(|task| task.external_id.clone()).collect();
 
     for mut task in tasks {
         // Stamp the originating source before dedup / enrichment.
@@ -188,9 +192,50 @@ async fn run_inner(
         outcome.routed += 1;
     }
 
+    outcome.pruned = reconcile_missing_tasks(config, source, &current_external_ids)?;
+
     Ok(())
 }
 
+fn reconcile_missing_tasks(
+    config: &Config,
+    source: &TaskSource,
+    current_external_ids: &HashSet<String>,
+) -> Result<usize, String> {
+    let ingested = store::list_ingested_refs(config, &source.id)
+        .map_err(|e| format!("list_ingested_refs failed: {e}"))?;
+    let mut pruned = 0usize;
+
+    for item in ingested {
+        if current_external_ids.contains(&item.external_id) {
+            continue;
+        }
+
+        if let Some(card_id) = item.card_id.as_deref().filter(|id| !id.trim().is_empty()) {
+            route::remove_card(config, card_id).map_err(|e| {
+                format!(
+                    "remove stale card '{}' for source '{}' external task '{}': {e}",
+                    card_id, source.id, item.external_id
+                )
+            })?;
+        }
+
+        if store::remove_ingested(config, &source.id, &item.external_id)
+            .map_err(|e| format!("remove_ingested failed: {e}"))?
+        {
+            pruned += 1;
+            tracing::debug!(
+                source_id = %source.id,
+                provider = %source.provider.as_str(),
+                external_id = %item.external_id,
+                "[task_sources:pipeline] pruned task absent from latest source fetch"
+            );
+        }
+    }
+
+    Ok(pruned)
+}
+
 #[cfg(test)]
 #[path = "pipeline_tests.rs"]
 mod tests;
diff --git a/src/openhuman/task_sources/pipeline_tests.rs b/src/openhuman/task_sources/pipeline_tests.rs
index e1c5a525f..863eb1d48 100644
--- a/src/openhuman/task_sources/pipeline_tests.rs
+++ b/src/openhuman/task_sources/pipeline_tests.rs
@@ -174,6 +174,46 @@ async fn edited_task_reroutes_as_new_card() {
     assert_eq!(ingested[0].title, "Edited title");
 }
 
+#[tokio::test]
+async fn task_missing_from_latest_fetch_is_pruned() {
+    let _guard = registry_lock();
+    register_provider(Arc::new(StubProvider {
+        tasks: vec![
+            canned_task("1", "Keep task", "2025-01-01T00:00:00Z"),
+            canned_task("2", "Closed task", "2025-01-02T00:00:00Z"),
+        ],
+    }));
+
+    let tmp = TempDir::new().unwrap();
+    let config = test_config(&tmp);
+    let source = add_github_source(&config);
+
+    let first = run_source_once(&config, &source, FetchReason::Manual).await;
+    assert_eq!(first.routed, 2, "error={:?}", first.error);
+    assert_eq!(route::board_cards(&config).unwrap().len(), 2);
+
+    // Simulate the provider returning only currently-open/matching tasks:
+    // task 2 was closed or no longer matches the source filter.
+    register_provider(Arc::new(StubProvider {
+        tasks: vec![canned_task("1", "Keep task", "2025-01-01T00:00:00Z")],
+    }));
+
+    let second = run_source_once(&config, &source, FetchReason::Manual).await;
+    assert_eq!(second.fetched, 1);
+    assert_eq!(second.routed, 0);
+    assert_eq!(second.skipped_dupe, 1);
+    assert_eq!(second.pruned, 1);
+    assert!(second.error.is_none());
+
+    let cards = route::board_cards(&config).unwrap();
+    assert_eq!(cards.len(), 1);
+    assert!(cards[0].title.contains("Keep task"));
+
+    let ingested = store::list_ingested(&config, &source.id, 10).unwrap();
+    assert_eq!(ingested.len(), 1);
+    assert_eq!(ingested[0].external_id, "1");
+}
+
 #[tokio::test]
 async fn missing_provider_surfaces_error_in_outcome() {
     let _guard = registry_lock();
diff --git a/src/openhuman/task_sources/route.rs b/src/openhuman/task_sources/route.rs
index d14084e77..ab14a4afd 100644
--- a/src/openhuman/task_sources/route.rs
+++ b/src/openhuman/task_sources/route.rs
@@ -25,6 +25,13 @@ use super::TaskKind;
 /// Stable thread id whose board collects every ingested task.
 pub const TASK_SOURCES_THREAD_ID: &str = "task-sources";
 
+fn task_sources_location(config: &Config) -> BoardLocation {
+    BoardLocation::Thread {
+        workspace_dir: config.workspace_dir.clone(),
+        thread_id: TASK_SOURCES_THREAD_ID.to_string(),
+    }
+}
+
 /// Route an enriched task: append a todo card, then (for proactive
 /// sources) dispatch a triage turn. Returns the new card id on success.
 pub async fn route_enriched(
@@ -65,16 +72,13 @@ fn add_card(
     enriched: &EnrichedTask,
     stale_card_id: Option<&str>,
 ) -> Result<String, String> {
-    let location = BoardLocation::Thread {
-        workspace_dir: config.workspace_dir.clone(),
-        thread_id: TASK_SOURCES_THREAD_ID.to_string(),
-    };
+    let location = task_sources_location(config);
 
     // Remove stale card from the previous ingestion of this task (if any)
     // before creating the replacement, so the board never accumulates
     // duplicate cards for the same upstream item.
     if let Some(old_id) = stale_card_id {
-        match todo_remove(&location, old_id) {
+        match remove_card(config, old_id) {
             Ok(_) => {
                 tracing::debug!(
                     source_id = %source.id,
@@ -230,10 +234,7 @@ async fn dispatch_triage(
     // Link the envelope to the board card so triage's escalation arm routes
     // it through the deterministic dispatcher (claim → autonomous run →
     // write-back) instead of the one-shot triage sub-agent.
-    let location = BoardLocation::Thread {
-        workspace_dir: config.workspace_dir.clone(),
-        thread_id: TASK_SOURCES_THREAD_ID.to_string(),
-    };
+    let location = task_sources_location(config);
     let envelope = TriggerEnvelope::from_external(
         &format!("task_sources:{}", source.id),
         "external task ingested",
@@ -289,13 +290,28 @@ fn provider_label(provider: &str) -> String {
 pub fn board_cards(
     config: &Config,
 ) -> Result<Vec<crate::openhuman::agent::task_board::TaskBoardCard>, String> {
-    let location = BoardLocation::Thread {
-        workspace_dir: config.workspace_dir.clone(),
-        thread_id: TASK_SOURCES_THREAD_ID.to_string(),
-    };
+    let location = task_sources_location(config);
     todos::ops::list(&location).map(|snap| snap.cards)
 }
 
+/// Remove a task-source board card. Missing cards are treated as already
+/// reconciled so ledger cleanup can still proceed.
+pub fn remove_card(config: &Config, card_id: &str) -> Result<bool, String> {
+    let location = task_sources_location(config);
+    match todo_remove(&location, card_id) {
+        Ok(_) => Ok(true),
+        Err(e) if e.contains("not found") => {
+            tracing::debug!(
+                card_id,
+                error = %e,
+                "[task_sources:route] card already absent during reconciliation"
+            );
+            Ok(false)
+        }
+        Err(e) => Err(e),
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
diff --git a/src/openhuman/task_sources/schemas.rs b/src/openhuman/task_sources/schemas.rs
index 61e635a36..f428baba1 100644
--- a/src/openhuman/task_sources/schemas.rs
+++ b/src/openhuman/task_sources/schemas.rs
@@ -53,6 +53,7 @@ pub fn all_controller_schemas() -> Vec<ControllerSchema> {
         schemas("update"),
         schemas("remove"),
         schemas("fetch"),
+        schemas("sync"),
         schemas("list_tasks"),
         schemas("preview_filter"),
         schemas("list_databases"),
@@ -86,6 +87,10 @@ pub fn all_registered_controllers() -> Vec<RegisteredController> {
             schema: schemas("fetch"),
             handler: handle_fetch,
         },
+        RegisteredController {
+            schema: schemas("sync"),
+            handler: handle_sync,
+        },
         RegisteredController {
             schema: schemas("list_tasks"),
             handler: handle_list_tasks,
@@ -230,6 +235,12 @@ pub fn schemas(function: &str) -> ControllerSchema {
                             comment: "True when the source was removed.",
                             required: true,
                         },
+                        FieldSchema {
+                            name: "pruned",
+                            ty: TypeSchema::U64,
+                            comment: "Count of ingested refs/cards pruned during removal.",
+                            required: true,
+                        },
                     ],
                 },
                 comment: "Removal result payload.",
@@ -239,7 +250,7 @@ pub fn schemas(function: &str) -> ControllerSchema {
         "fetch" => ControllerSchema {
             namespace: "task_sources",
             function: "fetch",
-            description: "Fetch one source immediately and route any new tasks.",
+            description: "Fetch one source immediately, route new tasks, and prune tasks no longer returned by the source.",
             inputs: vec![source_id_input(
                 "Identifier of the task source to fetch now.",
             )],
@@ -250,6 +261,18 @@ pub fn schemas(function: &str) -> ControllerSchema {
                 required: true,
             }],
         },
+        "sync" => ControllerSchema {
+            namespace: "task_sources",
+            function: "sync",
+            description: "Fetch every enabled source immediately, route new tasks, and prune tasks no longer returned by their source.",
+            inputs: vec![],
+            outputs: vec![FieldSchema {
+                name: "outcomes",
+                ty: TypeSchema::Array(Box::new(TypeSchema::Ref("FetchOutcome"))),
+                comment: "Fetch outcome counts for each enabled source.",
+                required: true,
+            }],
+        },
         "list_tasks" => ControllerSchema {
             namespace: "task_sources",
             function: "list_tasks",
@@ -444,6 +467,13 @@ fn handle_fetch(params: Map<String, Value>) -> ControllerFuture {
     })
 }
 
+fn handle_sync(_params: Map<String, Value>) -> ControllerFuture {
+    Box::pin(async move {
+        let config = config_rpc::load_config_with_timeout().await?;
+        to_json(ops::sync(&config).await?)
+    })
+}
+
 fn handle_list_tasks(params: Map<String, Value>) -> ControllerFuture {
     Box::pin(async move {
         let config = config_rpc::load_config_with_timeout().await?;
@@ -550,6 +580,7 @@ mod tests {
                 "update",
                 "remove",
                 "fetch",
+                "sync",
                 "list_tasks",
                 "preview_filter",
                 "list_databases",
@@ -561,7 +592,7 @@ mod tests {
     #[test]
     fn all_registered_controllers_has_handler_per_schema() {
         let controllers = all_registered_controllers();
-        assert_eq!(controllers.len(), 10);
+        assert_eq!(controllers.len(), all_controller_schemas().len());
         assert!(controllers
             .iter()
             .all(|c| c.schema.namespace == "task_sources"));
diff --git a/src/openhuman/task_sources/store.rs b/src/openhuman/task_sources/store.rs
index e3998f442..6fc9b32f1 100644
--- a/src/openhuman/task_sources/store.rs
+++ b/src/openhuman/task_sources/store.rs
@@ -25,6 +25,12 @@ use super::types::{
     FetchReason, FilterSpec, ProviderSlug, SourceTarget, TaskSource, TaskSourcePatch,
 };
 
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct IngestedTaskRef {
+    pub external_id: String,
+    pub card_id: Option<String>,
+}
+
 /// Compute an edit-aware content hash for a task. Two fetches of the
 /// same `external_id` whose title/body/status/updated_at/url differ produce
 /// different hashes, so an *edited* upstream item re-ingests.
@@ -309,6 +315,41 @@ pub fn get_card_id(config: &Config, source_id: &str, external_id: &str) -> Resul
     })
 }
 
+/// Return ingested task ids/card ids for one source. Used by reconciliation
+/// to prune board cards that no longer match the upstream source/filter.
+pub fn list_ingested_refs(config: &Config, source_id: &str) -> Result<Vec<IngestedTaskRef>> {
+    with_connection(config, |conn| {
+        let mut stmt = conn.prepare(
+            "SELECT external_id, card_id FROM ingested_tasks
+             WHERE source_id = ?1
+             ORDER BY ingested_at ASC, external_id ASC",
+        )?;
+        let rows = stmt.query_map(params![source_id], |row| {
+            Ok(IngestedTaskRef {
+                external_id: row.get(0)?,
+                card_id: row.get(1)?,
+            })
+        })?;
+        let mut out = Vec::new();
+        for row in rows {
+            out.push(row?);
+        }
+        Ok(out)
+    })
+}
+
+/// Delete one ingested ledger row after its board card has been reconciled.
+pub fn remove_ingested(config: &Config, source_id: &str, external_id: &str) -> Result<bool> {
+    let changed = with_connection(config, |conn| {
+        conn.execute(
+            "DELETE FROM ingested_tasks WHERE source_id = ?1 AND external_id = ?2",
+            params![source_id, external_id],
+        )
+        .context("Failed to delete ingested task")
+    })?;
+    Ok(changed > 0)
+}
+
 /// List the most recently ingested tasks for a source (newest first).
 pub fn list_ingested(
     config: &Config,
diff --git a/src/openhuman/task_sources/store_tests.rs b/src/openhuman/task_sources/store_tests.rs
index 7df94629f..4d936cc4d 100644
--- a/src/openhuman/task_sources/store_tests.rs
+++ b/src/openhuman/task_sources/store_tests.rs
@@ -264,6 +264,45 @@ async fn add_with_assigned_executor_persists_and_filters_blank() {
     assert_eq!(blank.value.assigned_executor, None);
 }
 
+#[tokio::test]
+async fn ops_remove_prunes_routed_cards_for_source() {
+    use crate::openhuman::task_sources::{ops, route};
+    use crate::openhuman::todos::ops::{add as todo_add, BoardLocation, CardPatch};
+
+    let tmp = TempDir::new().unwrap();
+    let config = test_config(&tmp);
+    let src = add_source(
+        &config,
+        ProviderSlug::Github,
+        None,
+        None,
+        github_filter(),
+        1800,
+        SourceTarget::TodoOnly,
+        25,
+    )
+    .unwrap();
+    let location = BoardLocation::Thread {
+        workspace_dir: config.workspace_dir.clone(),
+        thread_id: route::TASK_SOURCES_THREAD_ID.to_string(),
+    };
+    let snapshot = todo_add(&location, "[GitHub] A", CardPatch::default()).unwrap();
+    let card_id = snapshot.cards.last().unwrap().id.clone();
+    mark_ingested(
+        &config,
+        &src.id,
+        &sample_task("1", "A", "2025-01-01"),
+        &card_id,
+    )
+    .unwrap();
+
+    let out = ops::remove(&config, &src.id).await.expect("remove source");
+    assert_eq!(out.value["removed"], true);
+    assert_eq!(out.value["pruned"], 1);
+    assert!(route::board_cards(&config).unwrap().is_empty());
+    assert!(list_ingested(&config, &src.id, 10).unwrap().is_empty());
+}
+
 #[test]
 fn content_hash_changes_when_only_url_changes() {
     // `url` is load-bearing downstream (source_metadata / external write-back),
diff --git a/src/openhuman/task_sources/types.rs b/src/openhuman/task_sources/types.rs
index c2274b1a3..e6f7a5506 100644
--- a/src/openhuman/task_sources/types.rs
+++ b/src/openhuman/task_sources/types.rs
@@ -239,6 +239,10 @@ pub struct FetchOutcome {
     pub routed: usize,
     /// Tasks skipped because they were already ingested.
     pub skipped_dupe: usize,
+    /// Previously ingested tasks removed because the upstream source no longer
+    /// returns them for this filter/status.
+    #[serde(default)]
+    pub pruned: usize,
     /// Optional human-readable status line.
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub error: Option<String>,