diff --git a/apps/desktop/src/main/__tests__/app-shell-first-send-cleanup.test.ts b/apps/desktop/src/main/__tests__/app-shell-first-send-cleanup.test.ts
index f963f3d3de..578e321bb0 100644
--- a/apps/desktop/src/main/__tests__/app-shell-first-send-cleanup.test.ts
+++ b/apps/desktop/src/main/__tests__/app-shell-first-send-cleanup.test.ts
@@ -204,6 +204,7 @@ describe('composer first-send cleanup', () => {
         send: async () => Promise.reject(new Error('Skill discovery failed')),
         remove: async (sessionId: string) => {
           removed.push(sessionId);
+          return { kind: 'removed' as const };
         },
       },
     });
@@ -231,6 +232,7 @@ describe('composer first-send cleanup', () => {
         // and the rest of the happy path run after the cleanup window closes.
         remove: async (sessionId: string) => {
           removed.push(sessionId);
+          return { kind: 'removed' as const };
         },
       },
     });
@@ -256,6 +258,7 @@ describe('composer first-send cleanup', () => {
         send: async () => Promise.reject(new Error('Skill discovery failed')),
         remove: async (sessionId: string) => {
           removed.push(sessionId);
+          return { kind: 'removed' as const };
         },
       },
     });
@@ -342,7 +345,7 @@ describe('composer send failure feedback', () => {
       },
       send: async () =>
         Promise.reject(new Error('NO_REAL_CONNECTION:missing_api_key: no ready connection')),
-      remove: async () => undefined,
+      remove: async () => ({ kind: 'removed' as const }),
     },
   });
 
diff --git a/apps/desktop/src/main/__tests__/app-shell-session-purge.test.ts b/apps/desktop/src/main/__tests__/app-shell-session-purge.test.ts
index 2ed8dcfd37..373a06c8c8 100644
--- a/apps/desktop/src/main/__tests__/app-shell-session-purge.test.ts
+++ b/apps/desktop/src/main/__tests__/app-shell-session-purge.test.ts
@@ -37,6 +37,7 @@ function installWindow(
   harness: SweepHarness,
   options: {
     rejectIds?: readonly string[];
+    restoreIds?: readonly string[];
     surviving?: readonly SessionSummary[];
     /** Runs after each accepted removal, to model what another client did meanwhile. */
     onRemove?: (sessionId: string) => void;
@@ -52,8 +53,10 @@ function installWindow(
         sessions: {
           remove: async (id: string) => {
             if (options.rejectIds?.includes(id)) throw new Error(`busy:${id}`);
+            if (options.restoreIds?.includes(id)) return { kind: 'restored' as const };
             harness.removed.push(id);
             options.onRemove?.(id);
+            return { kind: 'removed' as const };
           },
           list: async () => {
             harness.listCalls += 1;
@@ -114,7 +117,13 @@ describe('purgeSessions', () => {
     const outcome = await actions.purgeSessions(['a-v2', 'b']).finally(restore);
 
     assert.deepEqual(h.removed, ['a-v2', 'b']);
-    assert.deepEqual(outcome, { removed: 2, remaining: [], verified: true, firstError: undefined });
+    assert.deepEqual(outcome, {
+      removed: 2,
+      restored: 0,
+      remaining: [],
+      verified: true,
+      firstError: undefined,
+    });
     // The family goes, not just the representative, and the open member of it
     // stops being the active session.
     assert.deepEqual(h.cleared.sort(), ['a', 'a-v2', 'b']);
@@ -136,6 +145,7 @@ describe('purgeSessions', () => {
 
     assert.deepEqual(h.removed, ['doomed']);
     assert.equal(outcome.removed, 1);
+    assert.equal(outcome.restored, 0);
     assert.deepEqual(outcome.remaining, []);
   });
 
@@ -157,7 +167,23 @@ describe('purgeSessions', () => {
 
     assert.deepEqual(h.removed, ['first']);
     assert.equal(outcome.removed, 1);
+    assert.equal(outcome.restored, 0);
+    assert.deepEqual(outcome.remaining, []);
+  });
+
+  it('counts a Host-side restore separately from a failed delete', async () => {
+    const h = harness();
+    const sessions = [summary('kept'), summary('doomed')];
+    const restore = installWindow(h, { restoreIds: ['kept'] });
+    const actions = createActions({ harness: h, sessions, activeIdRef: { current: undefined } });
+
+    const outcome = await actions.purgeSessions(['kept', 'doomed']).finally(restore);
+
+    assert.deepEqual(h.removed, ['doomed']);
+    assert.equal(outcome.removed, 1);
+    assert.equal(outcome.restored, 1);
     assert.deepEqual(outcome.remaining, []);
+    assert.equal(outcome.firstError, undefined);
   });
 
   it('skips an id whose row action is already in flight instead of racing it', async () => {
@@ -176,6 +202,7 @@ describe('purgeSessions', () => {
     assert.deepEqual(h.removed, ['free']);
     assert.deepEqual(outcome.remaining, ['busy']);
     assert.equal(outcome.removed, 1);
+    assert.equal(outcome.restored, 0);
   });
 
   it('counts a rejected delete that the catalog no longer lists as removed', async () => {
@@ -195,6 +222,7 @@ describe('purgeSessions', () => {
     assert.equal(h.listCalls, 1);
     assert.deepEqual(outcome.remaining, ['survivor']);
     assert.equal(outcome.removed, 1);
+    assert.equal(outcome.restored, 0);
     assert.equal((outcome.firstError as Error).message, 'busy:committed');
   });
 
@@ -216,5 +244,6 @@ describe('purgeSessions', () => {
     assert.equal(outcome.verified, false);
     assert.deepEqual(outcome.remaining, []);
     assert.equal(outcome.removed, 0);
+    assert.equal(outcome.restored, 0);
   });
 });
diff --git a/apps/desktop/src/main/__tests__/app-shell-session-row-actions-revisions.test.ts b/apps/desktop/src/main/__tests__/app-shell-session-row-actions-revisions.test.ts
index 9e29039ede..b4919b5d2d 100644
--- a/apps/desktop/src/main/__tests__/app-shell-session-row-actions-revisions.test.ts
+++ b/apps/desktop/src/main/__tests__/app-shell-session-row-actions-revisions.test.ts
@@ -34,7 +34,10 @@ function installWindow(calls: string[]): () => void {
           archive: async (id: string, options?: { revisionFamily?: boolean }) => { calls.push(`archive:${id}:${options?.revisionFamily === true}`); },
           unarchive: async (id: string, options?: { revisionFamily?: boolean }) => { calls.push(`unarchive:${id}:${options?.revisionFamily === true}`); },
           rename: async (id: string, name: string, options?: { revisionFamily?: boolean }) => { calls.push(`rename:${id}:${name}:${options?.revisionFamily === true}`); },
-          remove: async (id: string, options?: { revisionFamily?: boolean }) => { calls.push(`remove:${id}:${options?.revisionFamily === true}`); },
+          remove: async (id: string, options?: { revisionFamily?: boolean }) => {
+            calls.push(`remove:${id}:${options?.revisionFamily === true}`);
+            return { kind: 'removed' as const };
+          },
         },
       },
     },
diff --git a/apps/desktop/src/main/__tests__/runtime-host-client-operations.test.ts b/apps/desktop/src/main/__tests__/runtime-host-client-operations.test.ts
index 3a3705c0aa..fef5ff7dd1 100644
--- a/apps/desktop/src/main/__tests__/runtime-host-client-operations.test.ts
+++ b/apps/desktop/src/main/__tests__/runtime-host-client-operations.test.ts
@@ -133,6 +133,69 @@ test('settles branch cleanup when its target disappears between catalog reads',
   assert.equal(await client.removeSessionCopy('branch-copy'), 'removed');
 });
 
+test('removes an archived Session on the first matching revision', async () => {
+  const { client, requests } = clientWithResponses([
+    { kind: 'session', session: session('archived', 3, { isArchived: true }) },
+    { kind: 'removed', sessionId: 'archived' },
+  ]);
+
+  assert.equal(await client.removeSession('archived'), 'removed');
+  assert.deepEqual(
+    requests.filter(({ operation }) => operation === 'session.remove').map(({ input }) => input),
+    [{ sessionId: 'archived', expectedRevision: 3 }],
+  );
+});
+
+test('retries an archived remove after a same-lifecycle revision conflict', async () => {
+  const { client, requests } = clientWithResponses([
+    { kind: 'session', session: session('archived', 3, { isArchived: true }) },
+    { kind: 'revision_conflict', expectedRevision: 3, actualRevision: 4 },
+    { kind: 'session', session: session('archived', 4, { isArchived: true }) },
+    { kind: 'removed', sessionId: 'archived' },
+  ]);
+
+  assert.equal(await client.removeSession('archived'), 'removed');
+  assert.deepEqual(
+    requests.filter(({ operation }) => operation === 'session.remove').map(({ input }) => input),
+    [
+      { sessionId: 'archived', expectedRevision: 3 },
+      { sessionId: 'archived', expectedRevision: 4 },
+    ],
+  );
+});
+
+test('does not replay a remove after the Session is restored', async () => {
+  const { client, requests } = clientWithResponses([
+    { kind: 'session', session: session('archived', 3, { isArchived: true }) },
+    { kind: 'revision_conflict', expectedRevision: 3, actualRevision: 4 },
+    { kind: 'session', session: session('archived', 4, { isArchived: false }) },
+  ]);
+
+  assert.equal(await client.removeSession('archived'), 'restored');
+  assert.deepEqual(
+    requests.filter(({ operation }) => operation === 'session.remove').map(({ input }) => input),
+    [{ sessionId: 'archived', expectedRevision: 3 }],
+  );
+});
+
+test('still retries an active Session remove after a rename conflict', async () => {
+  const { client, requests } = clientWithResponses([
+    { kind: 'session', session: session('live', 3) },
+    { kind: 'revision_conflict', expectedRevision: 3, actualRevision: 4 },
+    { kind: 'session', session: session('live', 4) },
+    { kind: 'removed', sessionId: 'live' },
+  ]);
+
+  assert.equal(await client.removeSession('live'), 'removed');
+  assert.deepEqual(
+    requests.filter(({ operation }) => operation === 'session.remove').map(({ input }) => input),
+    [
+      { sessionId: 'live', expectedRevision: 3 },
+      { sessionId: 'live', expectedRevision: 4 },
+    ],
+  );
+});
+
 test('settles revision cleanup when abandon observes an already absent target', async () => {
   const { client } = clientWithResponses([
     {
diff --git a/apps/desktop/src/main/runtime-host-client.ts b/apps/desktop/src/main/runtime-host-client.ts
index 47ba8a108e..4106de6f69 100644
--- a/apps/desktop/src/main/runtime-host-client.ts
+++ b/apps/desktop/src/main/runtime-host-client.ts
@@ -838,14 +838,17 @@ export class DesktopRuntimeHostClient {
     );
   }
 
-  async removeSession(sessionId: string): Promise<void> {
+  async removeSession(sessionId: string): Promise<'removed' | 'restored'> {
+    let requiredArchived: boolean | undefined;
     for (let attempt = 0; attempt < MAX_SESSION_REVISION_ATTEMPTS; attempt += 1) {
       const current = await this.#requireSession(sessionId);
+      if (requiredArchived === undefined) requiredArchived = current.isArchived;
+      else if (requiredArchived && !current.isArchived) return 'restored';
       const result = await this.request("session.remove", {
         sessionId,
         expectedRevision: current.revision,
       });
-      if (result.kind === "removed") return;
+      if (result.kind === "removed") return 'removed';
     }
     throw revisionConflict("remove", sessionId);
   }
@@ -859,8 +862,8 @@ export class DesktopRuntimeHostClient {
         });
         return result.kind === 'abandoned' ? 'removed' : 'retained';
       }
-      await this.removeSession(sessionId);
-      return 'removed';
+      const removed = await this.removeSession(sessionId);
+      return removed === 'removed' ? 'removed' : 'retained';
     } catch (error) {
       if (isMissingSessionError(error)) return 'removed';
       throw error;
diff --git a/apps/desktop/src/main/runtime-host-session-catalog-ipc-main.ts b/apps/desktop/src/main/runtime-host-session-catalog-ipc-main.ts
index 8168b4bc7b..f9ef3b3a18 100644
--- a/apps/desktop/src/main/runtime-host-session-catalog-ipc-main.ts
+++ b/apps/desktop/src/main/runtime-host-session-catalog-ipc-main.ts
@@ -191,8 +191,10 @@ export function registerRuntimeHostSessionCatalogIpc(
   ipcMain.handle('sessions:remove', async (_event, sessionId: string, options?: unknown) => {
     requestsRevisionFamily(options);
     const ids = await actionIds(sessionId, { revisionFamily: true });
-    await deps.client.removeSession(sessionId);
+    const outcome = await deps.client.removeSession(sessionId);
+    if (outcome === 'restored') return { kind: 'restored' as const };
     await finishSessionRetirement(deps, ids, 'deleted');
+    return { kind: 'removed' as const };
   });
 }
 
diff --git a/apps/desktop/src/preload/bridge-contract.d.ts b/apps/desktop/src/preload/bridge-contract.d.ts
index 56aec7f324..a7cd08e701 100644
--- a/apps/desktop/src/preload/bridge-contract.d.ts
+++ b/apps/desktop/src/preload/bridge-contract.d.ts
@@ -492,7 +492,10 @@ export interface MakaBridge {
     abandonPlanExecution(sessionId: string, executionId: string): Promise<PlanSessionState>;
     setModel(sessionId: string, input: { llmConnectionSlug: string; model: string }): Promise<SessionSummary>;
     setThinkingLevel(sessionId: string, level: ThinkingLevel | undefined | null): Promise<SessionSummary>;
-    remove(sessionId: string, options?: { revisionFamily?: boolean }): Promise<void>;
+    remove(
+      sessionId: string,
+      options?: { revisionFamily?: boolean },
+    ): Promise<{ kind: 'removed' } | { kind: 'restored' }>;
     cleanupSessionCopy(sessionId: string): Promise<void>;
     abandonSessionCopy(sessionId: string): Promise<void>;
   };
diff --git a/apps/desktop/src/renderer/app-shell-session-row-actions.ts b/apps/desktop/src/renderer/app-shell-session-row-actions.ts
index 4ba076c25c..e971296b81 100644
--- a/apps/desktop/src/renderer/app-shell-session-row-actions.ts
+++ b/apps/desktop/src/renderer/app-shell-session-row-actions.ts
@@ -24,6 +24,8 @@ type ToastApi = {
 export interface SessionPurgeOutcome {
   /** Tasks confirmed gone. */
   removed: number;
+  /** Tasks left alone because they were restored while the sweep ran. */
+  restored: number;
   /** Tasks the catalog still reports. Empty when `verified` is false. */
   remaining: string[];
   verified: boolean;
@@ -129,9 +131,9 @@ export function createAppShellSessionRowActions(deps: {
         destructive: true,
       });
       if (!ok) return;
-      await removeSessionFamily(sessionId);
+      const outcome = await removeSessionFamily(sessionId);
       await refreshSessions();
-      toastApi.success(copy.deletedTitle(name));
+      if (outcome === 'removed') toastApi.success(copy.deletedTitle(name));
     });
   }
 
@@ -141,16 +143,18 @@ export function createAppShellSessionRowActions(deps: {
    * deletion and released those resources, so the cleanup below is only ever
    * reached for a task that is really gone.
    */
-  async function removeSessionFamily(sessionId: string): Promise<void> {
+  async function removeSessionFamily(sessionId: string): Promise<'removed' | 'restored'> {
     // Read before the write: the family comes off the live catalog, which no
     // longer lists it afterwards.
     const familyIds = revisionFamilySessionIds(sessionsRef.current, sessionId);
-    await window.maka.sessions.remove(sessionId, { revisionFamily: true });
+    const outcome = await window.maka.sessions.remove(sessionId, { revisionFamily: true });
+    if (outcome.kind === 'restored') return 'restored';
     if (activeIdRef.current && familyIds.includes(activeIdRef.current)) {
       setActiveId(undefined);
       setMessages([]);
     }
     for (const id of familyIds) clearSessionRendererState(id);
+    return 'removed';
   }
 
   /**
@@ -175,6 +179,7 @@ export function createAppShellSessionRowActions(deps: {
     const unsettled: string[] = [];
     let firstError: unknown;
     let removed = 0;
+    let restored = 0;
     for (const sessionId of sessionIds) {
       // Read the catalog as the sweep reaches each task, not once up front. A
       // sweep is serial, and a task restored from another window while it runs
@@ -198,8 +203,9 @@ export function createAppShellSessionRowActions(deps: {
       }
       pendingSessionRowActionsRef.current.add(key);
       try {
-        await removeSessionFamily(sessionId);
-        removed += 1;
+        const outcome = await removeSessionFamily(sessionId);
+        if (outcome === 'restored') restored += 1;
+        else removed += 1;
       } catch (error) {
         unsettled.push(sessionId);
         firstError ??= error;
@@ -209,7 +215,7 @@ export function createAppShellSessionRowActions(deps: {
     }
     if (unsettled.length === 0) {
       await refreshSessions();
-      return { removed, remaining: [], verified: true, firstError };
+      return { removed, restored, remaining: [], verified: true, firstError };
     }
     let listed: SessionSummary[] | undefined;
     try {
@@ -218,10 +224,16 @@ export function createAppShellSessionRowActions(deps: {
       listed = undefined;
     }
     await refreshSessions();
-    if (!listed) return { removed, remaining: [], verified: false, firstError };
+    if (!listed) return { removed, restored, remaining: [], verified: false, firstError };
     const present = new Set(listed.map((session) => session.id));
     const remaining = unsettled.filter((sessionId) => present.has(sessionId));
-    return { removed: removed + (unsettled.length - remaining.length), remaining, verified: true, firstError };
+    return {
+      removed: removed + (unsettled.length - remaining.length),
+      restored,
+      remaining,
+      verified: true,
+      firstError,
+    };
   }
 
   return {