diff --git a/src/__tests__/interactive.test.ts b/src/__tests__/interactive.test.ts
index 1419be9..76e29e5 100644
--- a/src/__tests__/interactive.test.ts
+++ b/src/__tests__/interactive.test.ts
@@ -387,6 +387,34 @@ describe('interactiveMode', () => {
     );
   });
 
+  it('should abort in-flight provider call on SIGINT during initial input', async () => {
+    mockGetProvider.mockReturnValue({
+      setup: () => ({
+        call: vi.fn((_prompt: string, options: { abortSignal?: AbortSignal }) => {
+          return new Promise((resolve) => {
+            options.abortSignal?.addEventListener('abort', () => {
+              resolve({
+                persona: 'interactive',
+                status: 'error',
+                content: 'aborted',
+                timestamp: new Date(),
+              });
+            }, { once: true });
+          });
+        }),
+      }),
+    } as unknown as ReturnType<typeof getProvider>);
+
+    const promise = interactiveMode('/project', 'trigger');
+    await new Promise<void>((resolve) => setTimeout(resolve, 0));
+
+    const listeners = process.rawListeners('SIGINT') as Array<() => void>;
+    listeners[listeners.length - 1]?.();
+
+    const result = await promise;
+    expect(result.action).toBe('cancel');
+  });
+
   it('should use saved sessionId from initializeSession when no sessionId parameter is given', async () => {
     // Given
     setupRawStdin(toRawInputs(['hello', '/cancel']));
diff --git a/src/__tests__/opencode-client-cleanup.test.ts b/src/__tests__/opencode-client-cleanup.test.ts
index 58c0e54..3081682 100644
--- a/src/__tests__/opencode-client-cleanup.test.ts
+++ b/src/__tests__/opencode-client-cleanup.test.ts
@@ -245,4 +245,115 @@ describe('OpenCodeClient stream cleanup', () => {
       expect.objectContaining({ signal: expect.any(AbortSignal) }),
     );
   });
+
+  it('should fail fast when question.asked is received without handler', async () => {
+    const { OpenCodeClient } = await import('../infra/opencode/client.js');
+    const stream = new MockEventStream([
+      {
+        type: 'question.asked',
+        properties: {
+          id: 'q-1',
+          sessionID: 'session-4',
+          questions: [
+            {
+              question: 'Select one',
+              header: 'Question',
+              options: [{ label: 'A', description: 'A desc' }],
+            },
+          ],
+        },
+      },
+    ]);
+
+    const promptAsync = vi.fn().mockResolvedValue(undefined);
+    const sessionCreate = vi.fn().mockResolvedValue({ data: { id: 'session-4' } });
+    const disposeInstance = vi.fn().mockResolvedValue({ data: {} });
+    const questionReject = vi.fn().mockResolvedValue({ data: true });
+
+    const subscribe = vi.fn().mockResolvedValue({ stream });
+    createOpencodeMock.mockResolvedValue({
+      client: {
+        instance: { dispose: disposeInstance },
+        session: { create: sessionCreate, promptAsync },
+        event: { subscribe },
+        permission: { reply: vi.fn() },
+        question: { reject: questionReject, reply: vi.fn() },
+      },
+      server: { close: vi.fn() },
+    });
+
+    const client = new OpenCodeClient();
+    const result = await client.call('interactive', 'hello', {
+      cwd: '/tmp',
+      model: 'opencode/big-pickle',
+    });
+
+    expect(result.status).toBe('error');
+    expect(result.content).toContain('no question handler');
+    expect(questionReject).toHaveBeenCalledWith({
+      requestID: 'q-1',
+      directory: '/tmp',
+    });
+  });
+
+  it('should answer question.asked when handler is configured', async () => {
+    const { OpenCodeClient } = await import('../infra/opencode/client.js');
+    const stream = new MockEventStream([
+      {
+        type: 'question.asked',
+        properties: {
+          id: 'q-2',
+          sessionID: 'session-5',
+          questions: [
+            {
+              question: 'Select one',
+              header: 'Question',
+              options: [{ label: 'A', description: 'A desc' }],
+            },
+          ],
+        },
+      },
+      {
+        type: 'message.updated',
+        properties: {
+          info: {
+            sessionID: 'session-5',
+            role: 'assistant',
+            time: { created: Date.now(), completed: Date.now() + 1 },
+          },
+        },
+      },
+    ]);
+
+    const promptAsync = vi.fn().mockResolvedValue(undefined);
+    const sessionCreate = vi.fn().mockResolvedValue({ data: { id: 'session-5' } });
+    const disposeInstance = vi.fn().mockResolvedValue({ data: {} });
+    const questionReply = vi.fn().mockResolvedValue({ data: true });
+
+    const subscribe = vi.fn().mockResolvedValue({ stream });
+    createOpencodeMock.mockResolvedValue({
+      client: {
+        instance: { dispose: disposeInstance },
+        session: { create: sessionCreate, promptAsync },
+        event: { subscribe },
+        permission: { reply: vi.fn() },
+        question: { reject: vi.fn(), reply: questionReply },
+      },
+      server: { close: vi.fn() },
+    });
+
+    const client = new OpenCodeClient();
+    const result = await client.call('interactive', 'hello', {
+      cwd: '/tmp',
+      model: 'opencode/big-pickle',
+      onAskUserQuestion: async () => ({ Question: 'A' }),
+    });
+
+    expect(result.status).toBe('done');
+    expect(questionReply).toHaveBeenCalledWith({
+      requestID: 'q-2',
+      directory: '/tmp',
+      answers: [['A']],
+    });
+  });
 });
diff --git a/src/features/interactive/conversationLoop.ts b/src/features/interactive/conversationLoop.ts
index 1819ceb..156862f 100644
--- a/src/features/interactive/conversationLoop.ts
+++ b/src/features/interactive/conversationLoop.ts
@@ -22,6 +22,7 @@ import { createLogger, getErrorMessage } from '../../shared/utils/index.js';
 import { info, error, blankLine, StreamDisplay } from '../../shared/ui/index.js';
 import { getLabel, getLabelObject } from '../../shared/i18n/index.js';
 import { readMultilineInput } from './lineEditor.js';
+import { EXIT_SIGINT } from '../../shared/exitCodes.js';
 import {
   type PieceContext,
   type InteractiveModeResult,
@@ -97,6 +98,21 @@ export async function callAIWithRetry(
   ctx: SessionContext,
 ): Promise<{ result: CallAIResult | null; sessionId: string | undefined }> {
   const display = new StreamDisplay('assistant', isQuietMode());
+  const abortController = new AbortController();
+  let sigintCount = 0;
+  const onSigInt = (): void => {
+    sigintCount += 1;
+    if (sigintCount === 1) {
+      blankLine();
+      info(getLabel('piece.sigintGraceful', ctx.lang));
+      abortController.abort();
+      return;
+    }
+    blankLine();
+    error(getLabel('piece.sigintForce', ctx.lang));
+    process.exit(EXIT_SIGINT);
+  };
+  process.on('SIGINT', onSigInt);
   let { sessionId } = ctx;
 
   try {
@@ -106,6 +122,7 @@ export async function callAIWithRetry(
       model: ctx.model,
       sessionId,
       allowedTools,
+      abortSignal: abortController.signal,
       onStream: display.createHandler(),
     });
     display.flush();
@@ -121,6 +138,7 @@ export async function callAIWithRetry(
         model: ctx.model,
         sessionId: undefined,
         allowedTools,
+        abortSignal: abortController.signal,
         onStream: retryDisplay.createHandler(),
       });
       retryDisplay.flush();
@@ -148,6 +166,8 @@ export async function callAIWithRetry(
     error(msg);
     blankLine();
     return { result: null, sessionId };
+  } finally {
+    process.removeListener('SIGINT', onSigInt);
   }
 }
 
diff --git a/src/infra/opencode/OpenCodeStreamHandler.ts b/src/infra/opencode/OpenCodeStreamHandler.ts
index 421bb6f..f7c0e82 100644
--- a/src/infra/opencode/OpenCodeStreamHandler.ts
+++ b/src/infra/opencode/OpenCodeStreamHandler.ts
@@ -87,6 +87,23 @@ export interface OpenCodePermissionAskedEvent {
   };
 }
 
+export interface OpenCodeQuestionAskedEvent {
+  type: 'question.asked';
+  properties: {
+    id: string;
+    sessionID: string;
+    questions: Array<{
+      question: string;
+      header: string;
+      options: Array<{
+        label: string;
+        description: string;
+      }>;
+      multiple?: boolean;
+    }>;
+  };
+}
+
 export type OpenCodeStreamEvent =
   | OpenCodeMessagePartUpdatedEvent
   | OpenCodeMessageUpdatedEvent
@@ -94,6 +111,7 @@ export type OpenCodeStreamEvent =
   | OpenCodeSessionIdleEvent
   | OpenCodeSessionErrorEvent
   | OpenCodePermissionAskedEvent
+  | OpenCodeQuestionAskedEvent
   | { type: string; properties: Record<string, unknown> };
 
 /** Tracking state for stream offsets during a single OpenCode session */
diff --git a/src/infra/opencode/client.ts b/src/infra/opencode/client.ts
index 2161c4d..3d266fd 100644
--- a/src/infra/opencode/client.ts
+++ b/src/infra/opencode/client.ts
@@ -83,6 +83,60 @@ function stripPromptEcho(
   return chunk;
 }
 
+type OpenCodeQuestionOption = {
+  label: string;
+  description: string;
+};
+
+type OpenCodeQuestionInfo = {
+  question: string;
+  header: string;
+  options: OpenCodeQuestionOption[];
+  multiple?: boolean;
+};
+
+type OpenCodeQuestionAskedProperties = {
+  id: string;
+  sessionID: string;
+  questions: OpenCodeQuestionInfo[];
+};
+
+function toQuestionInput(props: OpenCodeQuestionAskedProperties): {
+  questions: Array<{
+    question: string;
+    header?: string;
+    options?: Array<{
+      label: string;
+      description?: string;
+    }>;
+    multiSelect?: boolean;
+  }>;
+} {
+  return {
+    questions: props.questions.map((item) => ({
+      question: item.question,
+      header: item.header,
+      options: item.options.map((opt) => ({
+        label: opt.label,
+        description: opt.description,
+      })),
+      multiSelect: item.multiple,
+    })),
+  };
+}
+
+function toQuestionAnswers(
+  props: OpenCodeQuestionAskedProperties,
+  answers: Record<string, string>,
+): Array<Array<string>> {
+  return props.questions.map((item) => {
+    const key = item.header || item.question;
+    const value = answers[key];
+    if (!value) return [];
+    return [value];
+  });
+}
+
 async function getFreePort(): Promise<number> {
   return new Promise<number>((resolve, reject) => {
     const server = createServer();
@@ -205,6 +259,7 @@ export class OpenCodeClient {
         const config = {
           model: fullModel,
           small_model: fullModel,
+          permission: { question: 'deny' as const },
           ...(options.opencodeApiKey
             ? { provider: { opencode: { options: { apiKey: options.opencodeApiKey } } } }
             : {}),
@@ -302,6 +357,39 @@ export class OpenCodeClient {
             continue;
           }
 
+          if (sseEvent.type === 'question.asked') {
+            const questionProps = sseEvent.properties as OpenCodeQuestionAskedProperties;
+            if (questionProps.sessionID === sessionId) {
+              if (!options.onAskUserQuestion) {
+                await client.question.reject({
+                  requestID: questionProps.id,
+                  directory: options.cwd,
+                });
+                success = false;
+                failureMessage = 'OpenCode asked a question, but no question handler is configured';
+                break;
+              }
+
+              try {
+                const answers = await options.onAskUserQuestion(toQuestionInput(questionProps));
+                await client.question.reply({
+                  requestID: questionProps.id,
+                  directory: options.cwd,
+                  answers: toQuestionAnswers(questionProps, answers),
+                });
+              } catch {
+                await client.question.reject({
+                  requestID: questionProps.id,
+                  directory: options.cwd,
+                });
+                success = false;
+                failureMessage = 'OpenCode question handling failed';
+                break;
+              }
+            }
+            continue;
+          }
+
           if (sseEvent.type === 'message.updated') {
             const messageProps = sseEvent.properties as {
               info?: {
diff --git a/src/infra/opencode/types.ts b/src/infra/opencode/types.ts
index ae3976f..d25816d 100644
--- a/src/infra/opencode/types.ts
+++ b/src/infra/opencode/types.ts
@@ -3,6 +3,7 @@
  */
 
 import type { StreamCallback } from '../claude/index.js';
+import type { AskUserQuestionHandler } from '../../core/piece/types.js';
 import type { PermissionMode } from '../../core/models/index.js';
 
 /** OpenCode permission reply values */
@@ -29,6 +30,7 @@ export interface OpenCodeCallOptions {
   permissionMode?: PermissionMode;
   /** Enable streaming mode with callback (best-effort) */
   onStream?: StreamCallback;
+  onAskUserQuestion?: AskUserQuestionHandler;
   /** OpenCode API key */
   opencodeApiKey?: string;
 }
diff --git a/src/infra/providers/opencode.ts b/src/infra/providers/opencode.ts
index aa02680..d5df0aa 100644
--- a/src/infra/providers/opencode.ts
+++ b/src/infra/providers/opencode.ts
@@ -19,6 +19,7 @@ function toOpenCodeOptions(options: ProviderCallOptions): OpenCodeCallOptions {
     model: options.model,
     permissionMode: options.permissionMode,
     onStream: options.onStream,
+    onAskUserQuestion: options.onAskUserQuestion,
     opencodeApiKey: options.opencodeApiKey ?? resolveOpencodeApiKey(),
   };
 }