diff --git a/cockpit/ag-ui/client-tools/angular/e2e/client-tools.spec.ts b/cockpit/ag-ui/client-tools/angular/e2e/client-tools.spec.ts
index 51f5c1701..70d11cf27 100644
--- a/cockpit/ag-ui/client-tools/angular/e2e/client-tools.spec.ts
+++ b/cockpit/ag-ui/client-tools/angular/e2e/client-tools.spec.ts
@@ -33,4 +33,11 @@ test('client-tools: ask tool collects user confirmation and resumes the run', as
   await expect(confirm).toContainText('Table for two at 7pm');
   await confirm.getByRole('button', { name: 'Confirm' }).click();
   await expect(page.getByText('Your booking is confirmed')).toBeVisible({ timeout: 30000 });
+
+  // The confirm card freezes once resolved: the adapter writes the emitted
+  // result back onto the local tool call, so the component re-renders into its
+  // frozen state — the interactive buttons disappear and a confirmed line shows.
+  await expect(confirm).toContainText('Booking confirmed');
+  await expect(confirm.getByRole('button', { name: 'Confirm' })).toHaveCount(0);
+  await expect(confirm.getByRole('button', { name: 'Cancel' })).toHaveCount(0);
 });
diff --git a/cockpit/ag-ui/client-tools/angular/src/app/confirm-booking.component.ts b/cockpit/ag-ui/client-tools/angular/src/app/confirm-booking.component.ts
index 375aad156..94ab9e96f 100644
--- a/cockpit/ag-ui/client-tools/angular/src/app/confirm-booking.component.ts
+++ b/cockpit/ag-ui/client-tools/angular/src/app/confirm-booking.component.ts
@@ -7,23 +7,40 @@ import { injectRenderHost } from '@threadplane/render';
  * The model fills `summary`; the user confirms or cancels; the chosen value is
  * announced via `injectRenderHost().result(...)` and becomes the tool result
  * that resumes the run.
+ *
+ * Once the ask resolves, the adapter writes the emitted `{ confirmed }` back
+ * onto the local tool call, so this component re-renders with `confirmed` as a
+ * prop (chat-tool-views spreads `{...args, ...result, status}` into it). When
+ * `confirmed()` is defined we render a FROZEN line with no buttons; the live
+ * interactive card only shows while `confirmed()` is still undefined.
  */
 @Component({
   selector: 'app-confirm-booking',
   standalone: true,
   changeDetection: ChangeDetectionStrategy.OnPush,
   template: `
-    <div class="cb">
-      <p class="cb__summary">{{ summary() }}</p>
-      <div class="cb__actions">
-        <button type="button" class="cb__btn cb__btn--primary" (click)="respond(true)">Confirm</button>
-        <button type="button" class="cb__btn" (click)="respond(false)">Cancel</button>
+    @if (confirmed() === undefined) {
+      <div class="cb">
+        <p class="cb__summary">{{ summary() }}</p>
+        <div class="cb__actions">
+          <button type="button" class="cb__btn cb__btn--primary" (click)="respond(true)">Confirm</button>
+          <button type="button" class="cb__btn" (click)="respond(false)">Cancel</button>
+        </div>
       </div>
-    </div>
+    } @else if (confirmed() === true) {
+      <div class="cb cb--resolved">
+        <p class="cb__summary">Booking confirmed ✓</p>
+      </div>
+    } @else {
+      <div class="cb cb--resolved">
+        <p class="cb__summary">Booking cancelled</p>
+      </div>
+    }
   `,
   styles: [`
     .cb { border: 1px solid var(--ngaf-chat-separator, #e5e7eb); border-radius: 12px; padding: 16px; max-width: 360px; }
     .cb__summary { margin: 0 0 12px; }
+    .cb--resolved .cb__summary { margin: 0; opacity: 0.85; }
     .cb__actions { display: flex; gap: 8px; }
     .cb__btn { padding: 6px 14px; border-radius: 8px; border: 1px solid var(--ngaf-chat-separator, #e5e7eb); background: transparent; color: inherit; cursor: pointer; }
     .cb__btn--primary { background: var(--ngaf-chat-accent, #2563eb); color: #fff; border-color: transparent; }
@@ -31,6 +48,8 @@ import { injectRenderHost } from '@threadplane/render';
 })
 export class ConfirmBookingComponent {
   readonly summary = input<string>();
+  /** Spread back onto props after the ask resolves (undefined while interactive). */
+  readonly confirmed = input<boolean | undefined>(undefined);
   private readonly host = injectRenderHost();
   protected respond(confirmed: boolean): void {
     this.host.result({ confirmed });
diff --git a/cockpit/langgraph/client-tools/angular/e2e/client-tools.spec.ts b/cockpit/langgraph/client-tools/angular/e2e/client-tools.spec.ts
index 51f5c1701..70d11cf27 100644
--- a/cockpit/langgraph/client-tools/angular/e2e/client-tools.spec.ts
+++ b/cockpit/langgraph/client-tools/angular/e2e/client-tools.spec.ts
@@ -33,4 +33,11 @@ test('client-tools: ask tool collects user confirmation and resumes the run', as
   await expect(confirm).toContainText('Table for two at 7pm');
   await confirm.getByRole('button', { name: 'Confirm' }).click();
   await expect(page.getByText('Your booking is confirmed')).toBeVisible({ timeout: 30000 });
+
+  // The confirm card freezes once resolved: the adapter writes the emitted
+  // result back onto the local tool call, so the component re-renders into its
+  // frozen state — the interactive buttons disappear and a confirmed line shows.
+  await expect(confirm).toContainText('Booking confirmed');
+  await expect(confirm.getByRole('button', { name: 'Confirm' })).toHaveCount(0);
+  await expect(confirm.getByRole('button', { name: 'Cancel' })).toHaveCount(0);
 });
diff --git a/cockpit/langgraph/client-tools/angular/src/app/confirm-booking.component.ts b/cockpit/langgraph/client-tools/angular/src/app/confirm-booking.component.ts
index 375aad156..94ab9e96f 100644
--- a/cockpit/langgraph/client-tools/angular/src/app/confirm-booking.component.ts
+++ b/cockpit/langgraph/client-tools/angular/src/app/confirm-booking.component.ts
@@ -7,23 +7,40 @@ import { injectRenderHost } from '@threadplane/render';
  * The model fills `summary`; the user confirms or cancels; the chosen value is
  * announced via `injectRenderHost().result(...)` and becomes the tool result
  * that resumes the run.
+ *
+ * Once the ask resolves, the adapter writes the emitted `{ confirmed }` back
+ * onto the local tool call, so this component re-renders with `confirmed` as a
+ * prop (chat-tool-views spreads `{...args, ...result, status}` into it). When
+ * `confirmed()` is defined we render a FROZEN line with no buttons; the live
+ * interactive card only shows while `confirmed()` is still undefined.
  */
 @Component({
   selector: 'app-confirm-booking',
   standalone: true,
   changeDetection: ChangeDetectionStrategy.OnPush,
   template: `
-    <div class="cb">
-      <p class="cb__summary">{{ summary() }}</p>
-      <div class="cb__actions">
-        <button type="button" class="cb__btn cb__btn--primary" (click)="respond(true)">Confirm</button>
-        <button type="button" class="cb__btn" (click)="respond(false)">Cancel</button>
+    @if (confirmed() === undefined) {
+      <div class="cb">
+        <p class="cb__summary">{{ summary() }}</p>
+        <div class="cb__actions">
+          <button type="button" class="cb__btn cb__btn--primary" (click)="respond(true)">Confirm</button>
+          <button type="button" class="cb__btn" (click)="respond(false)">Cancel</button>
+        </div>
       </div>
-    </div>
+    } @else if (confirmed() === true) {
+      <div class="cb cb--resolved">
+        <p class="cb__summary">Booking confirmed ✓</p>
+      </div>
+    } @else {
+      <div class="cb cb--resolved">
+        <p class="cb__summary">Booking cancelled</p>
+      </div>
+    }
   `,
   styles: [`
     .cb { border: 1px solid var(--ngaf-chat-separator, #e5e7eb); border-radius: 12px; padding: 16px; max-width: 360px; }
     .cb__summary { margin: 0 0 12px; }
+    .cb--resolved .cb__summary { margin: 0; opacity: 0.85; }
     .cb__actions { display: flex; gap: 8px; }
     .cb__btn { padding: 6px 14px; border-radius: 8px; border: 1px solid var(--ngaf-chat-separator, #e5e7eb); background: transparent; color: inherit; cursor: pointer; }
     .cb__btn--primary { background: var(--ngaf-chat-accent, #2563eb); color: #fff; border-color: transparent; }
@@ -31,6 +48,8 @@ import { injectRenderHost } from '@threadplane/render';
 })
 export class ConfirmBookingComponent {
   readonly summary = input<string>();
+  /** Spread back onto props after the ask resolves (undefined while interactive). */
+  readonly confirmed = input<boolean | undefined>(undefined);
   private readonly host = injectRenderHost();
   protected respond(confirmed: boolean): void {
     this.host.result({ confirmed });
diff --git a/examples/ag-ui/angular/e2e/itinerary-client-tools.spec.ts b/examples/ag-ui/angular/e2e/itinerary-client-tools.spec.ts
index b1c44a3fd..af548df56 100644
--- a/examples/ag-ui/angular/e2e/itinerary-client-tools.spec.ts
+++ b/examples/ag-ui/angular/e2e/itinerary-client-tools.spec.ts
@@ -67,4 +67,11 @@ test('ask chain: clear_day confirm mutates the panel and resumes the run', async
 
   await expect(panel).not.toContainText("Musée d'Orsay");
   await expect(page.getByText('Done — day 2 is cleared.')).toBeVisible({ timeout: 30_000 });
+
+  // The confirm card freezes once resolved: the adapter writes the emitted
+  // result back onto the local tool call, so the component re-renders into its
+  // frozen state — the interactive buttons are gone and a resolved line shows.
+  await expect(confirm).toContainText('Day 2 cleared');
+  await expect(confirm.getByRole('button', { name: 'Clear' })).toHaveCount(0);
+  await expect(confirm.getByRole('button', { name: 'Cancel' })).toHaveCount(0);
 });
diff --git a/examples/ag-ui/angular/src/app/clear-day-confirm.component.ts b/examples/ag-ui/angular/src/app/clear-day-confirm.component.ts
index 293f27340..9febe9244 100644
--- a/examples/ag-ui/angular/src/app/clear-day-confirm.component.ts
+++ b/examples/ag-ui/angular/src/app/clear-day-confirm.component.ts
@@ -10,19 +10,35 @@ import { ItineraryStore } from './itinerary-store';
  * HERE: Clear writes the shared `ItineraryStore` (so the panel updates live)
  * and then announces the outcome via `injectRenderHost().result(...)`, which
  * becomes the tool result that resumes the run. Cancel never touches the store.
+ *
+ * Once the ask resolves, the adapter writes the emitted value back onto the
+ * local tool call, so this component re-renders with `cleared`/`removed` as
+ * props (chat-tool-views spreads `{...args, ...result, status}` into it). When
+ * `cleared()` is defined we render a FROZEN line with no buttons; the live
+ * interactive card only shows while `cleared()` is still undefined.
  */
 @Component({
   selector: 'app-clear-day-confirm',
   standalone: true,
   changeDetection: ChangeDetectionStrategy.OnPush,
   template: `
-    <div class="cdc">
-      <p class="cdc__summary">Clear all {{ count() }} stops on day {{ day() }}?</p>
-      <div class="cdc__actions">
-        <button type="button" class="cdc__btn cdc__btn--primary" (click)="clear()">Clear</button>
-        <button type="button" class="cdc__btn" (click)="cancel()">Cancel</button>
+    @if (cleared() === undefined) {
+      <div class="cdc">
+        <p class="cdc__summary">Clear all {{ count() }} stops on day {{ day() }}?</p>
+        <div class="cdc__actions">
+          <button type="button" class="cdc__btn cdc__btn--primary" (click)="clear()">Clear</button>
+          <button type="button" class="cdc__btn" (click)="cancel()">Cancel</button>
+        </div>
       </div>
-    </div>
+    } @else if (cleared() === true) {
+      <div class="cdc cdc--resolved">
+        <p class="cdc__summary">Day {{ day() }} cleared — {{ removed() }} removed ✓</p>
+      </div>
+    } @else {
+      <div class="cdc cdc--resolved">
+        <p class="cdc__summary">Kept day {{ day() }} — clear cancelled</p>
+      </div>
+    }
   `,
   styles: [
     `
@@ -32,6 +48,10 @@ import { ItineraryStore } from './itinerary-store';
         padding: 16px;
         max-width: 360px;
       }
+      .cdc--resolved .cdc__summary {
+        margin: 0;
+        opacity: 0.85;
+      }
       .cdc__summary {
         margin: 0 0 12px;
       }
@@ -57,6 +77,9 @@ import { ItineraryStore } from './itinerary-store';
 })
 export class ClearDayConfirmComponent {
   readonly day = input.required<number>();
+  /** Spread back onto props after the ask resolves (undefined while interactive). */
+  readonly cleared = input<boolean | undefined>(undefined);
+  readonly removed = input<number | undefined>(undefined);
   private readonly store = inject(ItineraryStore);
   private readonly host = injectRenderHost();
 
diff --git a/examples/ag-ui/angular/src/app/client-tools.ts b/examples/ag-ui/angular/src/app/client-tools.ts
index 2546a4d7b..1d553d32e 100644
--- a/examples/ag-ui/angular/src/app/client-tools.ts
+++ b/examples/ag-ui/angular/src/app/client-tools.ts
@@ -18,12 +18,12 @@ export function itineraryClientTools(): ClientToolRegistry {
       async () => ({ days: store.days() }),
     ),
     add_stop: action(
-      'Add a stop to a day of the trip itinerary.',
+      'Add a stop to a day of the trip itinerary. Afterwards, show the updated day with day_card.',
       z.object({ day: z.number().int().min(1), place: z.string(), note: z.string().optional() }),
       async ({ day, place, note }) => ({ added: store.add(day, place, note) }),
     ),
     move_stop: action(
-      'Move an existing stop (matched by place name) to another day.',
+      'Move an existing stop (matched by place name) to another day. Afterwards, show the updated day with day_card.',
       z.object({ place: z.string(), toDay: z.number().int().min(1) }),
       async ({ place, toDay }) => {
         const moved = store.move(place, toDay);
@@ -38,7 +38,7 @@ export function itineraryClientTools(): ClientToolRegistry {
       ClearDayConfirmComponent,
     ),
     day_card: view(
-      "Show the user a recap card for one itinerary day after you've changed it.",
+      "Show the user a visual recap card for one itinerary day. Call it after add_stop or move_stop with the day's full updated place list.",
       z.object({ day: z.number().int().min(1), places: z.array(z.string()) }),
       DayCardComponent,
     ),
diff --git a/libs/ag-ui/src/lib/client-tools.spec.ts b/libs/ag-ui/src/lib/client-tools.spec.ts
index e9dab7026..2bd7ac37a 100644
--- a/libs/ag-ui/src/lib/client-tools.spec.ts
+++ b/libs/ag-ui/src/lib/client-tools.spec.ts
@@ -164,7 +164,7 @@ describe('createClientToolsCapability', () => {
     expect((args.tools[0] as { name: string }).name).toBe('get_weather');
   });
 
-  it('resolve(ok) drops the id from pending() even though store.result stays undefined', () => {
+  it('resolve(ok) drops the id from pending() and writes the result onto the store tool call', () => {
     const source = makeSource();
     const store  = makeStore();
     const cap    = createClientToolsCapability(source, store);
@@ -173,13 +173,34 @@ describe('createClientToolsCapability', () => {
     store.toolCalls.set([{ id: 'c1', name: 'get_weather', args: {}, status: 'complete' }]);
 
     expect(cap.pending()).toHaveLength(1);
-    cap.resolve('c1', { ok: true, value: { temp: 70 } });
-    // result is still undefined in the store — resolvedIds guard should drop it
+    cap.resolve('c1', { ok: true, value: { cleared: true } });
+    // resolvedIds guard drops it, AND the result is now written onto the store
+    // tool call (belt-and-braces: the result write alone also excludes it).
     expect(cap.pending()).toHaveLength(0);
+    const tc = store.toolCalls().find((t) => t.id === 'c1');
+    expect(tc?.result).toEqual({ cleared: true });
+    expect(tc?.status).toBe('complete');
+    expect(tc?.error).toBeUndefined();
   });
 
   // ---- resolve — error result ------------------------------------------------
 
+  it('resolve(error) writes { error } result + error + status=error onto the store tool call', () => {
+    const source = makeSource();
+    const store  = makeStore();
+    const cap    = createClientToolsCapability(source, store);
+    cap.setCatalog([WEATHER_SPEC]);
+    store.isLoading.set(false);
+    store.toolCalls.set([{ id: 'c1', name: 'get_weather', args: {}, status: 'complete' }]);
+
+    cap.resolve('c1', { ok: false, error: 'boom' });
+
+    const tc = store.toolCalls().find((t) => t.id === 'c1');
+    expect(tc?.result).toEqual({ error: 'boom' });
+    expect(tc?.error).toBe('boom');
+    expect(tc?.status).toBe('error');
+  });
+
   it('resolve(error) adds message whose content contains the error string', () => {
     const source = makeSource();
     const store  = makeStore();
diff --git a/libs/ag-ui/src/lib/client-tools.ts b/libs/ag-ui/src/lib/client-tools.ts
index df1ab0549..8ac7f16cd 100644
--- a/libs/ag-ui/src/lib/client-tools.ts
+++ b/libs/ag-ui/src/lib/client-tools.ts
@@ -35,8 +35,11 @@ function safeStringify(v: unknown): string {
  *    have no backend result, and haven't been resolved client-side yet — but ONLY
  *    when the run is not in progress (isLoading===false). The backend ends the run
  *    without emitting TOOL_CALL_RESULT for client tools, so result stays undefined.
- *  - resolve(id, result): marks the call as resolved, adds a ToolMessage via
- *    source.addMessage, then re-runs the agent with the catalog tools attached.
+ *  - resolve(id, result): marks the call as resolved, writes the outcome onto
+ *    the local ToolCall in the store (so the transcript freezes: the mounted
+ *    ask component re-renders with its emitted value as props and can branch to
+ *    a frozen state), adds a ToolMessage via source.addMessage, then re-runs
+ *    the agent with the catalog tools attached.
  *
  * Call catalogAsAgUiTools() to get the current catalog as AG-UI Tool[] for
  * threading into runAgent().
@@ -72,12 +75,34 @@ export function createClientToolsCapability(
       // Mark as resolved first so pending() drops it immediately.
       resolvedIds.update((s) => new Set(s).add(id));
 
+      // Write the outcome onto the LOCAL ToolCall in the store. The client tool
+      // DID produce a result client-side, so this is semantically correct — and
+      // it freezes the transcript card: toToolViewSpec spreads `{...args,
+      // ...result, status}` into the mounted ask component, so the component
+      // re-renders with its own emitted value as props and can branch to a
+      // resolved/frozen state. The backend ToolMessage never reaches this local
+      // ToolCall, so without this write the card stays interactive forever.
+      const ok = result.ok;
+      const value = (result as { value: unknown }).value;
+      const error = (result as { error: string }).error;
+      store.toolCalls.update((calls) =>
+        calls.map((tc) =>
+          tc.id === id
+            ? {
+                ...tc,
+                result: ok ? value : { error },
+                ...(ok ? {} : { error, status: 'error' as const }),
+              }
+            : tc,
+        ),
+      );
+
       // Cast rather than rely on discriminant narrowing: consumer apps that
       // compile this source with `strictNullChecks: false` don't narrow the
       // ClientToolResult union in a ternary.
-      const content = result.ok
-        ? safeStringify((result as { value: unknown }).value)
-        : `Error: ${(result as { error: string }).error}`;
+      const content = ok
+        ? safeStringify(value)
+        : `Error: ${error}`;
 
       source.addMessage({
         id: `tool-${id}`,
diff --git a/libs/langgraph/src/lib/agent.fn.ts b/libs/langgraph/src/lib/agent.fn.ts
index ef499a7af..26a3d8c61 100644
--- a/libs/langgraph/src/lib/agent.fn.ts
+++ b/libs/langgraph/src/lib/agent.fn.ts
@@ -64,6 +64,7 @@ import { createStreamManagerBridge } from './internals/stream-manager.bridge';
 import { buildBranchTree } from './internals/branch-tree';
 import { extractCitations } from './internals/extract-citations';
 import { createClientToolsCapability, mergeClientTools } from './client-tools';
+import type { ClientToolResultPatch } from './client-tools';
 
 /**
  * Walk LangGraph history (newest-first) and pair each AIMessage id with
@@ -345,7 +346,22 @@ export function agent<
     rawMessages().map((m) => toMessage(m, manager.getReasoningDurationMs)),
   );
 
-  const toolCallsNeutral = computed<ToolCall[]>(() => rawToolCalls().map(toToolCall));
+  // Client-tool resolutions written client-side. The raw `toolCalls$` stream
+  // (and thus `rawToolCalls`) only ever carries backend results — a resolved
+  // client tool (`ask`/`view`) never receives a backend ToolMessage on its
+  // LOCAL call. These overrides layer the client-side outcome over the raw
+  // projection so the transcript card can freeze (see chat-tool-views
+  // toToolViewSpec, which spreads `result` into the mounted component's props).
+  const clientResultOverrides = signal<ReadonlyMap<string, ClientToolResultPatch>>(new Map());
+
+  const toolCallsNeutral = computed<ToolCall[]>(() => {
+    const overrides = clientResultOverrides();
+    return rawToolCalls().map((tc) => {
+      const neutral = toToolCall(tc);
+      const patch = overrides.get(neutral.id);
+      return patch ? { ...neutral, ...patch } : neutral;
+    });
+  });
 
   const statusNeutral = computed<AgentStatus>(() => mapStatus(statusSig()));
 
@@ -384,7 +400,12 @@ export function agent<
   // in the submit wrapper below and in the resolve path inside the capability.
   const clientToolsCap = createClientToolsCapability(
     (payload, opts) => manager.submit(payload, opts),
-    { toolCalls: toolCallsNeutral, isLoading },
+    {
+      toolCalls: toolCallsNeutral,
+      isLoading,
+      applyClientResult: (id, patch) =>
+        clientResultOverrides.update((m) => new Map(m).set(id, patch)),
+    },
   );
 
   return {
diff --git a/libs/langgraph/src/lib/client-tools.spec.ts b/libs/langgraph/src/lib/client-tools.spec.ts
index f99c5a681..eb245fbf1 100644
--- a/libs/langgraph/src/lib/client-tools.spec.ts
+++ b/libs/langgraph/src/lib/client-tools.spec.ts
@@ -20,6 +20,12 @@ function makeStore(overrides?: {
   return {
     toolCalls: toolCallsSig,
     isLoading: isLoadingSig,
+    // Mirror the real adapter: layer the client-side outcome onto the matching
+    // tool call so tests (and the render chain) can read the frozen result back.
+    applyClientResult: (id, patch) =>
+      toolCallsSig.update((calls) =>
+        calls.map((tc) => (tc.id === id ? { ...tc, ...patch } : tc)),
+      ),
     toolCallsSig,
     isLoadingSig,
   };
@@ -225,7 +231,7 @@ describe('createClientToolsCapability', () => {
     expect(payload['client_tools']).toEqual([WEATHER_SPEC]);
   });
 
-  it('resolve(ok) drops id from pending() immediately (resolvedIds guard)', () => {
+  it('resolve(ok) drops id from pending() AND writes the result onto the store tool call', () => {
     const store    = makeStore({ isLoading: false });
     const cap      = createClientToolsCapability(makeSubmitFn(), store);
     cap.setCatalog([WEATHER_SPEC]);
@@ -234,9 +240,14 @@ describe('createClientToolsCapability', () => {
     ]);
 
     expect(cap.pending()).toHaveLength(1);
-    cap.resolve('c1', { ok: true, value: { temp: 70 } });
-    // result is still undefined in the store — resolvedIds guard drops it
+    cap.resolve('c1', { ok: true, value: { cleared: true } });
+    // resolvedIds guard drops it, AND the result is now written onto the store
+    // tool call (belt-and-braces: the result write alone also excludes it).
     expect(cap.pending()).toHaveLength(0);
+    const tc = store.toolCalls().find((t) => t.id === 'c1');
+    expect(tc?.result).toEqual({ cleared: true });
+    expect(tc?.status).toBe('complete');
+    expect(tc?.error).toBeUndefined();
   });
 
   it('resolve does not affect other pending calls', () => {
@@ -294,7 +305,7 @@ describe('createClientToolsCapability', () => {
     expect(payload['client_tools']).toEqual([WEATHER_SPEC]);
   });
 
-  it('resolve(error) drops id from pending() immediately', () => {
+  it('resolve(error) drops id from pending() AND writes { error } + status=error onto the store', () => {
     const store = makeStore({ isLoading: false });
     const cap   = createClientToolsCapability(makeSubmitFn(), store);
     cap.setCatalog([WEATHER_SPEC]);
@@ -305,6 +316,10 @@ describe('createClientToolsCapability', () => {
     expect(cap.pending()).toHaveLength(1);
     cap.resolve('c2', { ok: false, error: 'boom' });
     expect(cap.pending()).toHaveLength(0);
+    const tc = store.toolCalls().find((t) => t.id === 'c2');
+    expect(tc?.result).toEqual({ error: 'boom' });
+    expect(tc?.error).toBe('boom');
+    expect(tc?.status).toBe('error');
   });
 
   // ── catalog shipping in normal submit ───────────────────────────────────────
diff --git a/libs/langgraph/src/lib/client-tools.ts b/libs/langgraph/src/lib/client-tools.ts
index 51771d63e..5f339484f 100644
--- a/libs/langgraph/src/lib/client-tools.ts
+++ b/libs/langgraph/src/lib/client-tools.ts
@@ -5,6 +5,16 @@ import type { ClientToolsCapability, ClientToolResult, ClientToolSpec } from '@t
 import type { ToolCall } from '@threadplane/chat';
 import type { LangGraphSubmitOptions } from './agent.types';
 
+/**
+ * A patch written onto a local ToolCall when a client tool resolves.
+ * Mirrors the fields the ag-ui adapter writes directly onto its WritableSignal.
+ */
+export interface ClientToolResultPatch {
+  result: unknown;
+  error?: unknown;
+  status?: ToolCall['status'];
+}
+
 /**
  * Minimal store surface consumed by createClientToolsCapability.
  * Typed narrowly so the factory is easy to fake in tests.
@@ -12,6 +22,15 @@ import type { LangGraphSubmitOptions } from './agent.types';
 export interface ClientToolsStore {
   toolCalls: Signal<readonly ToolCall[]>;
   isLoading: Signal<boolean>;
+  /**
+   * Write a client-tool outcome onto the local ToolCall with the given id.
+   * The LangGraph `toolCalls` signal is a read-only projection of the SDK's
+   * stream, so the adapter layers these patches over the projection rather
+   * than mutating it in place. This freezes the transcript card: toToolViewSpec
+   * spreads the result into the mounted ask component's props on the next
+   * render, letting it branch to a resolved/frozen state.
+   */
+  applyClientResult(id: string, patch: ClientToolResultPatch): void;
 }
 
 /**
@@ -114,9 +133,25 @@ export function createClientToolsCapability(
       // Cast rather than rely on discriminant narrowing: consumer apps that
       // compile this source with `strictNullChecks: false` don't narrow the
       // ClientToolResult union in a ternary.
-      const content = result.ok
-        ? safeStringify((result as { value: unknown }).value)
-        : `Error: ${(result as { error: string }).error}`;
+      const ok = result.ok;
+      const value = (result as { value: unknown }).value;
+      const error = (result as { error: string }).error;
+
+      // Write the outcome onto the LOCAL ToolCall (via the adapter's override
+      // layer). The client tool DID produce a result client-side, so this is
+      // semantically correct — and it freezes the transcript card: the mounted
+      // ask component re-renders with its own emitted value as props and can
+      // branch to a resolved/frozen state. Without this, the LOCAL tool call
+      // never gets a result (only the backend ToolMessage does) so the card
+      // stays interactive forever.
+      store.applyClientResult(id, {
+        result: ok ? value : { error },
+        ...(ok ? {} : { error, status: 'error' as const }),
+      });
+
+      const content = ok
+        ? safeStringify(value)
+        : `Error: ${error}`;
 
       // Issue a new run on the same thread. LangGraph's add_messages reducer
       // appends the ToolMessage to the thread state. `client_tools` is