diff --git a/src/__tests__/claude-client-status.test.ts b/src/__tests__/claude-client-status.test.ts
new file mode 100644
index 0000000..d6713df
--- /dev/null
+++ b/src/__tests__/claude-client-status.test.ts
@@ -0,0 +1,71 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+
+const { mockExecuteClaudeCli } = vi.hoisted(() => ({
+  mockExecuteClaudeCli: vi.fn(),
+}));
+
+vi.mock('../infra/claude/process.js', () => ({
+  executeClaudeCli: mockExecuteClaudeCli,
+}));
+
+vi.mock('../shared/utils/index.js', () => ({
+  createLogger: vi.fn(() => ({
+    error: vi.fn(),
+    warn: vi.fn(),
+    info: vi.fn(),
+    debug: vi.fn(),
+  })),
+}));
+
+vi.mock('../shared/prompts/index.js', () => ({
+  loadTemplate: vi.fn(() => 'system prompt'),
+}));
+
+import { ClaudeClient } from '../infra/claude/client.js';
+import type { ClaudeCallOptions } from '../infra/claude/client.js';
+
+describe('ClaudeClient status normalization', () => {
+  const options: ClaudeCallOptions = {
+    cwd: '/tmp/takt-test',
+  };
+
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it('should return error status when call() receives an interrupted failure', async () => {
+    mockExecuteClaudeCli.mockResolvedValue({
+      success: false,
+      interrupted: true,
+      content: 'Interrupted by signal',
+      error: 'SIGINT',
+      sessionId: 'session-1',
+    });
+
+    const client = new ClaudeClient();
+
+    const response = await client.call('coder', 'Implement feature', options);
+
+    expect(response.status).toBe('error');
+    expect(response.error).toBe('SIGINT');
+    expect(response.content).toBe('Interrupted by signal');
+  });
+
+  it('should return error status when callCustom() receives an interrupted failure', async () => {
+    mockExecuteClaudeCli.mockResolvedValue({
+      success: false,
+      interrupted: true,
+      content: 'Interrupted by signal',
+      error: 'SIGINT',
+      sessionId: 'session-2',
+    });
+
+    const client = new ClaudeClient();
+
+    const response = await client.callCustom('custom-coder', 'Implement feature', 'system prompt', options);
+
+    expect(response.status).toBe('error');
+    expect(response.error).toBe('SIGINT');
+    expect(response.content).toBe('Interrupted by signal');
+  });
+});
diff --git a/src/__tests__/engine-error.test.ts b/src/__tests__/engine-error.test.ts
index 676c207..bc7c0cf 100644
--- a/src/__tests__/engine-error.test.ts
+++ b/src/__tests__/engine-error.test.ts
@@ -155,8 +155,8 @@ describe('PieceEngine Integration: Error Handling', () => {
   // =====================================================
   // 3. Interrupted status routing
   // =====================================================
-  describe('Interrupted status', () => {
-    it('should continue with normal rule routing and skip report phase when movement returns interrupted', async () => {
+  describe('Error status', () => {
+    it('should abort immediately and skip report phase when movement returns error', async () => {
       const config = buildDefaultPieceConfig({
         initialMovement: 'plan',
         movements: [
@@ -169,11 +169,12 @@ describe('PieceEngine Integration: Error Handling', () => {
       const engine = new PieceEngine(config, tmpDir, 'test task', { projectCwd: tmpDir });
 
       mockRunAgentSequence([
-        makeResponse({ persona: 'plan', status: 'interrupted', content: 'Partial response' }),
-      ]);
-
-      mockDetectMatchedRuleSequence([
-        { index: 0, method: 'phase1_tag' },
+        makeResponse({
+          persona: 'plan',
+          status: 'error',
+          content: 'Partial response',
+          error: 'interrupted by signal',
+        }),
       ]);
 
       const abortFn = vi.fn();
@@ -181,10 +182,107 @@ describe('PieceEngine Integration: Error Handling', () => {
 
       const state = await engine.run();
 
-      expect(state.status).toBe('completed');
-      expect(abortFn).not.toHaveBeenCalled();
+      expect(state.status).toBe('aborted');
+      expect(abortFn).toHaveBeenCalledOnce();
       expect(runReportPhase).not.toHaveBeenCalled();
     });
+
+    it('should abort when movement returns an unhandled status and skip report phase', async () => {
+      const config = buildDefaultPieceConfig({
+        initialMovement: 'plan',
+        movements: [
+          makeMovement('plan', {
+            outputContracts: [{ name: '01-plan.md', format: '# Plan' }],
+            rules: [makeRule('continue', 'COMPLETE')],
+          }),
+        ],
+      });
+      const engine = new PieceEngine(config, tmpDir, 'test task', { projectCwd: tmpDir });
+
+      mockRunAgentSequence([
+        makeResponse({
+          persona: 'plan',
+          status: 'pending' as never,
+          content: 'pending response',
+        }),
+      ]);
+
+      const abortFn = vi.fn();
+      engine.on('piece:abort', abortFn);
+
+      const state = await engine.run();
+
+      expect(state.status).toBe('aborted');
+      expect(abortFn).toHaveBeenCalledOnce();
+      const reason = abortFn.mock.calls[0]![1] as string;
+      expect(reason).toContain('Unhandled response status: pending');
+      expect(runReportPhase).not.toHaveBeenCalled();
+    });
+  });
+
+  describe('runSingleIteration status routing', () => {
+    it('should abort without rule resolution when movement returns blocked', async () => {
+      const config = buildDefaultPieceConfig({
+        initialMovement: 'plan',
+        movements: [
+          makeMovement('plan', {
+            rules: [makeRule('continue', 'COMPLETE')],
+          }),
+        ],
+      });
+      const engine = new PieceEngine(config, tmpDir, 'test task', { projectCwd: tmpDir });
+
+      mockRunAgentSequence([
+        makeResponse({
+          persona: 'plan',
+          status: 'blocked',
+          content: 'need input',
+        }),
+      ]);
+
+      const abortFn = vi.fn();
+      engine.on('piece:abort', abortFn);
+
+      const result = await engine.runSingleIteration();
+
+      expect(result.nextMovement).toBe('ABORT');
+      expect(result.isComplete).toBe(true);
+      expect(engine.getState().status).toBe('aborted');
+      expect(abortFn).toHaveBeenCalledOnce();
+    });
+
+    it('should abort without rule resolution when movement returns error', async () => {
+      const config = buildDefaultPieceConfig({
+        initialMovement: 'plan',
+        movements: [
+          makeMovement('plan', {
+            rules: [makeRule('continue', 'COMPLETE')],
+          }),
+        ],
+      });
+      const engine = new PieceEngine(config, tmpDir, 'test task', { projectCwd: tmpDir });
+
+      mockRunAgentSequence([
+        makeResponse({
+          persona: 'plan',
+          status: 'error',
+          content: 'failed',
+          error: 'request failed',
+        }),
+      ]);
+
+      const abortFn = vi.fn();
+      engine.on('piece:abort', abortFn);
+
+      const result = await engine.runSingleIteration();
+
+      expect(result.nextMovement).toBe('ABORT');
+      expect(result.isComplete).toBe(true);
+      expect(engine.getState().status).toBe('aborted');
+      expect(abortFn).toHaveBeenCalledOnce();
+      const reason = abortFn.mock.calls[0]![1] as string;
+      expect(reason).toContain('Movement "plan" failed: request failed');
+    });
   });
 
   // =====================================================
diff --git a/src/__tests__/engine-loop-monitors.test.ts b/src/__tests__/engine-loop-monitors.test.ts
index 31aff5d..2044a0b 100644
--- a/src/__tests__/engine-loop-monitors.test.ts
+++ b/src/__tests__/engine-loop-monitors.test.ts
@@ -39,6 +39,7 @@ vi.mock('../shared/utils/index.js', async (importOriginal) => ({
 
 import { PieceEngine } from '../core/piece/index.js';
 import { runAgent } from '../agents/runner.js';
+import { runReportPhase } from '../core/piece/phase-runner.js';
 import {
   makeResponse,
   makeMovement,
@@ -208,6 +209,40 @@ describe('PieceEngine Integration: Loop Monitors', () => {
       // 8 iterations: impl + ai_review*3 + ai_fix*2 + judge + reviewers
       expect(state.iteration).toBe(8);
     });
+
+    it('should abort when judge returns non-done status', async () => {
+      const config = buildConfigWithLoopMonitor(1);
+      engine = new PieceEngine(config, tmpDir, 'test task', { projectCwd: tmpDir });
+
+      mockRunAgentSequence([
+        makeResponse({ persona: 'implement', content: 'Implementation done' }),
+        makeResponse({ persona: 'ai_review', content: 'Issues found: X' }),
+        makeResponse({ persona: 'ai_fix', content: 'Fixed X' }),
+        makeResponse({
+          persona: 'supervisor',
+          status: 'error',
+          content: 'judge failed',
+          error: 'judge interrupted',
+        }),
+      ]);
+
+      mockDetectMatchedRuleSequence([
+        { index: 0, method: 'phase1_tag' },
+        { index: 1, method: 'phase1_tag' },
+        { index: 0, method: 'phase1_tag' },
+      ]);
+
+      const abortFn = vi.fn();
+      engine.on('piece:abort', abortFn);
+
+      const state = await engine.run();
+
+      expect(state.status).toBe('aborted');
+      expect(abortFn).toHaveBeenCalledOnce();
+      const reason = abortFn.mock.calls[0]![1] as string;
+      expect(reason).toContain('Unhandled response status: error');
+      expect(runReportPhase).not.toHaveBeenCalled();
+    });
   });
 
   // =====================================================
diff --git a/src/__tests__/it-mock-scenario.test.ts b/src/__tests__/it-mock-scenario.test.ts
index 40c067b..3bce2ae 100644
--- a/src/__tests__/it-mock-scenario.test.ts
+++ b/src/__tests__/it-mock-scenario.test.ts
@@ -14,6 +14,7 @@ import {
   resetScenario,
   type ScenarioEntry,
 } from '../infra/mock/index.js';
+import { STATUS_VALUES } from '../core/models/status.js';
 
 describe('ScenarioQueue', () => {
   it('should consume entries in order when no agent specified', () => {
@@ -130,6 +131,16 @@ describe('loadScenarioFile', () => {
     expect(entries[1]).toEqual({ persona: undefined, status: 'blocked', content: 'Blocked' });
   });
 
+  it('should accept all statuses from shared status contract', () => {
+    const scenario = STATUS_VALUES.map((status, i) => ({ status, content: `entry-${i}` }));
+    const filePath = join(tempDir, 'all-statuses.json');
+    writeFileSync(filePath, JSON.stringify(scenario));
+
+    const entries = loadScenarioFile(filePath);
+
+    expect(entries.map((entry) => entry.status)).toEqual([...STATUS_VALUES]);
+  });
+
   it('should default status to "done" if omitted', () => {
     const scenario = [{ content: 'Simple response' }];
     const filePath = join(tempDir, 'scenario.json');
@@ -167,7 +178,21 @@ describe('loadScenarioFile', () => {
 
   it('should throw for invalid status', () => {
     const filePath = join(tempDir, 'bad-status.json');
-    writeFileSync(filePath, '[{"content": "test", "status": "invalid"}]');
+    writeFileSync(filePath, '[{"content": "test", "status": "approved"}]');
+
+    expect(() => loadScenarioFile(filePath)).toThrow('invalid status');
+  });
+
+  it('should throw for rejected status', () => {
+    const filePath = join(tempDir, 'rejected-status.json');
+    writeFileSync(filePath, '[{"content": "test", "status": "rejected"}]');
+
+    expect(() => loadScenarioFile(filePath)).toThrow('invalid status');
+  });
+
+  it('should throw for improve status', () => {
+    const filePath = join(tempDir, 'improve-status.json');
+    writeFileSync(filePath, '[{"content": "test", "status": "improve"}]');
 
     expect(() => loadScenarioFile(filePath)).toThrow('invalid status');
   });
diff --git a/src/__tests__/models.test.ts b/src/__tests__/models.test.ts
index a2b8cc9..66ce034 100644
--- a/src/__tests__/models.test.ts
+++ b/src/__tests__/models.test.ts
@@ -14,6 +14,7 @@ import {
   GlobalConfigSchema,
   ProjectConfigSchema,
 } from '../core/models/index.js';
+import { STATUS_VALUES } from '../core/models/status.js';
 
 describe('AgentTypeSchema', () => {
   it('should accept valid agent types', () => {
@@ -30,18 +31,25 @@ describe('AgentTypeSchema', () => {
 
 describe('StatusSchema', () => {
   it('should accept valid statuses', () => {
-    expect(StatusSchema.parse('pending')).toBe('pending');
     expect(StatusSchema.parse('done')).toBe('done');
-    expect(StatusSchema.parse('approved')).toBe('approved');
-    expect(StatusSchema.parse('rejected')).toBe('rejected');
     expect(StatusSchema.parse('blocked')).toBe('blocked');
     expect(StatusSchema.parse('error')).toBe('error');
-    expect(StatusSchema.parse('answer')).toBe('answer');
+  });
+
+  it('should align with the shared status contract values', () => {
+    expect(StatusSchema.options).toEqual([...STATUS_VALUES]);
   });
 
   it('should reject invalid statuses', () => {
     expect(() => StatusSchema.parse('unknown')).toThrow();
     expect(() => StatusSchema.parse('conditional')).toThrow();
+    expect(() => StatusSchema.parse('pending')).toThrow();
+    expect(() => StatusSchema.parse('approved')).toThrow();
+    expect(() => StatusSchema.parse('rejected')).toThrow();
+    expect(() => StatusSchema.parse('improve')).toThrow();
+    expect(() => StatusSchema.parse('cancelled')).toThrow();
+    expect(() => StatusSchema.parse('interrupted')).toThrow();
+    expect(() => StatusSchema.parse('answer')).toThrow();
   });
 });
 
diff --git a/src/core/models/schemas.ts b/src/core/models/schemas.ts
index aef04da..22d4802 100644
--- a/src/core/models/schemas.ts
+++ b/src/core/models/schemas.ts
@@ -8,6 +8,7 @@ import { z } from 'zod/v4';
 import { DEFAULT_LANGUAGE } from '../../shared/constants.js';
 import { McpServersSchema } from './mcp-schemas.js';
 import { INTERACTIVE_MODES } from './interactive-mode.js';
+import { STATUS_VALUES } from './status.js';
 
 export { McpServerConfigSchema, McpServersSchema } from './mcp-schemas.js';
 
@@ -44,18 +45,7 @@ export const TaktConfigSchema = z.object({
 export const AgentTypeSchema = z.enum(['coder', 'architect', 'supervisor', 'custom']);
 
 /** Status schema */
-export const StatusSchema = z.enum([
-  'pending',
-  'done',
-  'blocked',
-  'error',
-  'approved',
-  'rejected',
-  'improve',
-  'cancelled',
-  'interrupted',
-  'answer',
-]);
+export const StatusSchema = z.enum(STATUS_VALUES);
 
 /** Permission mode schema for tool execution */
 export const PermissionModeSchema = z.enum(['readonly', 'edit', 'full']);
diff --git a/src/core/models/session.ts b/src/core/models/session.ts
index d503e5f..dc44a8d 100644
--- a/src/core/models/session.ts
+++ b/src/core/models/session.ts
@@ -5,6 +5,8 @@
 import type { AgentResponse } from './response.js';
 import type { Status } from './status.js';
 
+type SessionAgentStatus = 'pending' | Status;
+
 /**
  * Session state for piece execution
  */
@@ -13,9 +15,9 @@ export interface SessionState {
   projectDir: string;
   iteration: number;
   maxMovements: number;
-  coderStatus: Status;
-  architectStatus: Status;
-  supervisorStatus: Status;
+  coderStatus: SessionAgentStatus;
+  architectStatus: SessionAgentStatus;
+  supervisorStatus: SessionAgentStatus;
   history: AgentResponse[];
   context: string;
 }
diff --git a/src/core/models/status.ts b/src/core/models/status.ts
index 0dde9f7..9da61a4 100644
--- a/src/core/models/status.ts
+++ b/src/core/models/status.ts
@@ -6,17 +6,10 @@
 export type AgentType = 'coder' | 'architect' | 'supervisor' | 'custom';
 
 /** Execution status for agents and pieces */
-export type Status =
-  | 'pending'
-  | 'done'
-  | 'blocked'
-  | 'error'
-  | 'approved'
-  | 'rejected'
-  | 'improve'
-  | 'cancelled'
-  | 'interrupted'
-  | 'answer';
+export const STATUS_VALUES = ['done', 'blocked', 'error'] as const;
+
+/** Execution status for agents and pieces */
+export type Status = typeof STATUS_VALUES[number];
 
 /** How a rule match was detected */
 export type RuleMatchMethod =
diff --git a/src/core/piece/engine/PieceEngine.ts b/src/core/piece/engine/PieceEngine.ts
index b963e18..5c11b00 100644
--- a/src/core/piece/engine/PieceEngine.ts
+++ b/src/core/piece/engine/PieceEngine.ts
@@ -446,6 +446,14 @@ export class PieceEngine extends EventEmitter {
     throw new Error(`No matching rule found for movement "${step.name}" (status: ${response.status})`);
   }
 
+  private resolveNextMovementFromDone(step: PieceMovement, response: AgentResponse): string {
+    if (response.status !== 'done') {
+      throw new Error(`Unhandled response status: ${response.status}`);
+    }
+
+    return this.resolveNextMovement(step, response);
+  }
+
   /** Build instruction (public, used by pieceExecution.ts for logging) */
   buildInstruction(step: PieceMovement, movementIteration: number): string {
     return this.movementExecutor.buildInstruction(
@@ -557,7 +565,7 @@ export class PieceEngine extends EventEmitter {
     this.emit('movement:complete', judgeMovement, response, instruction);
 
     // Resolve next movement from the judge's rules
-    const nextMovement = this.resolveNextMovement(judgeMovement, response);
+    const nextMovement = this.resolveNextMovementFromDone(judgeMovement, response);
 
     log.info('Loop monitor judge decision', {
       cycle: monitor.cycle,
@@ -658,7 +666,7 @@ export class PieceEngine extends EventEmitter {
           break;
         }
 
-        let nextMovement = this.resolveNextMovement(movement, response);
+        let nextMovement = this.resolveNextMovementFromDone(movement, response);
         log.debug('Movement transition', {
           from: movement.name,
           status: response.status,
@@ -764,7 +772,21 @@ export class PieceEngine extends EventEmitter {
 
     this.state.iteration++;
     const { response } = await this.runMovement(movement);
-    const nextMovement = this.resolveNextMovement(movement, response);
+
+    if (response.status === 'blocked') {
+      this.state.status = 'aborted';
+      this.emit('piece:abort', this.state, 'Piece blocked and no user input provided');
+      return { response, nextMovement: ABORT_MOVEMENT, isComplete: true, loopDetected: loopCheck.isLoop };
+    }
+
+    if (response.status === 'error') {
+      const detail = response.error ?? response.content;
+      this.state.status = 'aborted';
+      this.emit('piece:abort', this.state, `Movement "${movement.name}" failed: ${detail}`);
+      return { response, nextMovement: ABORT_MOVEMENT, isComplete: true, loopDetected: loopCheck.isLoop };
+    }
+
+    const nextMovement = this.resolveNextMovementFromDone(movement, response);
     const isComplete = nextMovement === COMPLETE_MOVEMENT || nextMovement === ABORT_MOVEMENT;
 
     if (response.matchedRuleIndex != null && movement.rules) {
diff --git a/src/infra/claude/client.ts b/src/infra/claude/client.ts
index 2ca5057..295c19f 100644
--- a/src/infra/claude/client.ts
+++ b/src/infra/claude/client.ts
@@ -25,9 +25,6 @@ export class ClaudeClient {
     result: { success: boolean; interrupted?: boolean; content: string; fullContent?: string },
   ): Status {
     if (!result.success) {
-      if (result.interrupted) {
-        return 'interrupted';
-      }
       return 'error';
     }
     return 'done';
diff --git a/src/infra/claude/process.ts b/src/infra/claude/process.ts
index 75e6e2c..781a66e 100644
--- a/src/infra/claude/process.ts
+++ b/src/infra/claude/process.ts
@@ -64,7 +64,6 @@ export async function executeClaudeCli(
 export class ClaudeProcess {
   private options: ClaudeSpawnOptions;
   private currentSessionId?: string;
-  private interrupted = false;
 
   constructor(options: ClaudeSpawnOptions) {
     this.options = options;
@@ -72,18 +71,13 @@ export class ClaudeProcess {
 
   /** Execute a prompt */
   async execute(prompt: string): Promise<ClaudeResult> {
-    this.interrupted = false;
     const result = await executeClaudeCli(prompt, this.options);
     this.currentSessionId = result.sessionId;
-    if (result.interrupted) {
-      this.interrupted = true;
-    }
     return result;
   }
 
   /** Interrupt the running query */
   kill(): void {
-    this.interrupted = true;
     interruptCurrentProcess();
   }
 
@@ -96,9 +90,4 @@ export class ClaudeProcess {
   getSessionId(): string | undefined {
     return this.currentSessionId;
   }
-
-  /** Check if query was interrupted */
-  wasInterrupted(): boolean {
-    return this.interrupted;
-  }
 }
diff --git a/src/infra/mock/scenario.ts b/src/infra/mock/scenario.ts
index 7ffc0ff..b946b37 100644
--- a/src/infra/mock/scenario.ts
+++ b/src/infra/mock/scenario.ts
@@ -8,6 +8,7 @@
 
 import { readFileSync, existsSync } from 'node:fs';
 import type { ScenarioEntry } from './types.js';
+import { STATUS_VALUES } from '../../core/models/status.js';
 
 export type { ScenarioEntry };
 
@@ -130,11 +131,10 @@ function validateEntry(entry: unknown, index: number): ScenarioEntry {
   }
 
   // status defaults to 'done'
-  const validStatuses = ['done', 'blocked', 'error', 'approved', 'rejected', 'improve'] as const;
   const status = obj.status ?? 'done';
-  if (typeof status !== 'string' || !validStatuses.includes(status as typeof validStatuses[number])) {
+  if (typeof status !== 'string' || !STATUS_VALUES.includes(status as typeof STATUS_VALUES[number])) {
     throw new Error(
-      `Scenario entry [${index}] has invalid status "${String(status)}". Valid: ${validStatuses.join(', ')}`,
+      `Scenario entry [${index}] has invalid status "${String(status)}". Valid: ${STATUS_VALUES.join(', ')}`,
     );
   }
 
diff --git a/src/infra/mock/types.ts b/src/infra/mock/types.ts
index 5bb5dae..a36b642 100644
--- a/src/infra/mock/types.ts
+++ b/src/infra/mock/types.ts
@@ -3,6 +3,7 @@
  */
 
 import type { StreamCallback } from '../claude/index.js';
+import type { Status } from '../../core/models/status.js';
 
 /** Options for mock calls */
 export interface MockCallOptions {
@@ -12,7 +13,7 @@ export interface MockCallOptions {
   /** Fixed response content (optional, defaults to generic mock response) */
   mockResponse?: string;
   /** Fixed status to return (optional, defaults to 'done') */
-  mockStatus?: 'done' | 'blocked' | 'error' | 'approved' | 'rejected' | 'improve';
+  mockStatus?: Status;
   /** Structured output payload returned as-is */
   structuredOutput?: Record<string, unknown>;
 }
@@ -22,7 +23,7 @@ export interface ScenarioEntry {
   /** Persona name to match (optional — if omitted, consumed by call order) */
   persona?: string;
   /** Response status */
-  status: 'done' | 'blocked' | 'error' | 'approved' | 'rejected' | 'improve';
+  status: Status;
   /** Response content body */
   content: string;
   /** Optional structured output payload (for outputSchema-driven flows) */