diff --git a/eslint.config.js b/eslint.config.js
index caffbdf336b..da1dc61caae 100644
--- a/eslint.config.js
+++ b/eslint.config.js
@@ -17,6 +17,21 @@ import storybook from 'eslint-plugin-storybook';
 import checkFile from 'eslint-plugin-check-file';
 import { legacyFilenames } from './eslint.legacy-filenames.mjs';
 
+// General syntax restrictions applied to every TS/TSX source file. Hoisted so
+// surface-specific overrides (flat config keeps only the last
+// no-restricted-syntax setting per file) can repeat them without drift.
+const generalRestrictedSyntaxSelectors = [
+  {
+    selector: 'CallExpression[callee.name="require"]',
+    message: 'Avoid using require(). Use ES6 imports instead.',
+  },
+  {
+    selector: 'ThrowStatement > Literal:not([value=/^\\w+Error:/])',
+    message:
+      'Do not throw string literals or non-Error objects. Throw new Error("...") instead.',
+  },
+];
+
 export default tseslint.config(
   {
     // Global ignores
@@ -72,6 +87,26 @@ export default tseslint.config(
       'import/namespace': 'off', // Disabled due to https://github.com/import-js/eslint-plugin-import/issues/2866
     },
   },
+  {
+    // ACP integration and the daemon are separate runtime surfaces that happen
+    // to share a package directory. ACP may consume neutral contracts under
+    // `runtime/`, but never `serve/` implementation modules — see #8084.
+    files: ['packages/cli/src/acp-integration/**/*.{ts,tsx,js}'],
+    rules: {
+      'no-restricted-imports': [
+        'error',
+        {
+          patterns: [
+            {
+              group: ['**/serve', '**/serve/**'],
+              message:
+                'acp-integration must not import serve/ internals. Put shared, lifecycle-free logic in packages/cli/src/runtime/ instead (#8084).',
+            },
+          ],
+        },
+      ],
+    },
+  },
   {
     // `utils/` is the layer every other directory imports, so it must not
     // import back into one. The daemon direction is clean and enforced here;
@@ -168,18 +203,7 @@ export default tseslint.config(
       'no-cond-assign': 'error',
       'no-debugger': 'error',
       'no-duplicate-case': 'error',
-      'no-restricted-syntax': [
-        'error',
-        {
-          selector: 'CallExpression[callee.name="require"]',
-          message: 'Avoid using require(). Use ES6 imports instead.',
-        },
-        {
-          selector: 'ThrowStatement > Literal:not([value=/^\\w+Error:/])',
-          message:
-            'Do not throw string literals or non-Error objects. Throw new Error("...") instead.',
-        },
-      ],
+      'no-restricted-syntax': ['error', ...generalRestrictedSyntaxSelectors],
       'no-unsafe-finally': 'error',
       'no-console': 'error',
       'no-unused-expressions': 'off', // Disable base rule
@@ -197,6 +221,26 @@ export default tseslint.config(
       'default-case': 'error',
     },
   },
+  {
+    // no-restricted-imports only sees static import/export declarations, so a
+    // dynamic `await import('../serve/...')` would slip past the #8084 guard
+    // above. Kept after the general TS block because flat config applies only
+    // the last no-restricted-syntax setting per file, hence the repeated
+    // general selectors.
+    files: ['packages/cli/src/acp-integration/**/*.{ts,tsx,js}'],
+    rules: {
+      'no-restricted-syntax': [
+        'error',
+        ...generalRestrictedSyntaxSelectors,
+        {
+          // \x2f is '/' — esquery selector regexes cannot contain a literal '/'.
+          selector: "ImportExpression[source.value=/(^|\\x2f)serve(\\x2f|$)/i]",
+          message:
+            'acp-integration must not dynamically import serve/ internals. Put shared, lifecycle-free logic in packages/cli/src/runtime/ instead (#8084).',
+        },
+      ],
+    },
+  },
   {
     files: [
       'packages/web-shell/client/**/*.{ts,tsx}',
diff --git a/packages/cli/src/acp-integration/acpAgent.ts b/packages/cli/src/acp-integration/acpAgent.ts
index 5dfeaa1ae4b..b9052dadb1f 100644
--- a/packages/cli/src/acp-integration/acpAgent.ts
+++ b/packages/cli/src/acp-integration/acpAgent.ts
@@ -224,7 +224,7 @@ import {
   type PermissionRuleSet,
 } from '../config/permission-settings.js';
 import { createLoadedSettingsAdapter } from '../config/loadedSettingsAdapter.js';
-import { isCompatibleLiveSessionSource } from '../serve/conversations/session-source.js';
+import { isCompatibleLiveSessionSource } from '../runtime/live-session-source.js';
 import type { ApprovalModeValue } from './session/types.js';
 import { z } from 'zod';
 import type { CliArgs } from '../config/config.js';
diff --git a/packages/cli/src/serve/live/capture-screen-context.test.ts b/packages/cli/src/acp-integration/live/capture-screen-context.test.ts
similarity index 100%
rename from packages/cli/src/serve/live/capture-screen-context.test.ts
rename to packages/cli/src/acp-integration/live/capture-screen-context.test.ts
diff --git a/packages/cli/src/serve/live/capture-screen-context.ts b/packages/cli/src/acp-integration/live/capture-screen-context.ts
similarity index 100%
rename from packages/cli/src/serve/live/capture-screen-context.ts
rename to packages/cli/src/acp-integration/live/capture-screen-context.ts
diff --git a/packages/cli/src/serve/live/live-backend-instructions.test.ts b/packages/cli/src/acp-integration/live/live-backend-instructions.test.ts
similarity index 100%
rename from packages/cli/src/serve/live/live-backend-instructions.test.ts
rename to packages/cli/src/acp-integration/live/live-backend-instructions.test.ts
diff --git a/packages/cli/src/serve/live/live-backend-instructions.ts b/packages/cli/src/acp-integration/live/live-backend-instructions.ts
similarity index 100%
rename from packages/cli/src/serve/live/live-backend-instructions.ts
rename to packages/cli/src/acp-integration/live/live-backend-instructions.ts
diff --git a/packages/cli/src/serve/live/live-speak-to-user.test.ts b/packages/cli/src/acp-integration/live/live-speak-to-user.test.ts
similarity index 100%
rename from packages/cli/src/serve/live/live-speak-to-user.test.ts
rename to packages/cli/src/acp-integration/live/live-speak-to-user.test.ts
diff --git a/packages/cli/src/serve/live/live-speak-to-user.ts b/packages/cli/src/acp-integration/live/live-speak-to-user.ts
similarity index 100%
rename from packages/cli/src/serve/live/live-speak-to-user.ts
rename to packages/cli/src/acp-integration/live/live-speak-to-user.ts
diff --git a/packages/cli/src/serve/live/live-task-tools.test.ts b/packages/cli/src/acp-integration/live/live-task-tools.test.ts
similarity index 100%
rename from packages/cli/src/serve/live/live-task-tools.test.ts
rename to packages/cli/src/acp-integration/live/live-task-tools.test.ts
diff --git a/packages/cli/src/serve/live/live-task-tools.ts b/packages/cli/src/acp-integration/live/live-task-tools.ts
similarity index 100%
rename from packages/cli/src/serve/live/live-task-tools.ts
rename to packages/cli/src/acp-integration/live/live-task-tools.ts
diff --git a/packages/cli/src/acp-integration/session/Session.test.ts b/packages/cli/src/acp-integration/session/Session.test.ts
index 91a03d63810..11046c442fa 100644
--- a/packages/cli/src/acp-integration/session/Session.test.ts
+++ b/packages/cli/src/acp-integration/session/Session.test.ts
@@ -54,8 +54,8 @@ import * as nonInteractiveCliCommands from '../../nonInteractiveCliCommands.js';
 import { CommandKind } from '../../ui/commands/types.js';
 import { buildAcpModelOptions } from '../../utils/acpModelUtils.js';
 import { CHANNEL_PROMPT_META_KEY } from '@qwen-code/channel-base';
-import { CAPTURE_SCREEN_CONTEXT_TOOL_NAME } from '../../serve/live/capture-screen-context.js';
-import { SPEAK_TO_USER_TOOL_NAME } from '../../serve/live/live-speak-to-user.js';
+import { CAPTURE_SCREEN_CONTEXT_TOOL_NAME } from '../live/capture-screen-context.js';
+import { SPEAK_TO_USER_TOOL_NAME } from '../live/live-speak-to-user.js';
 import {
   collectHistoryReplayUpdates,
   createReplayCumulativeUsage,
diff --git a/packages/cli/src/acp-integration/session/Session.ts b/packages/cli/src/acp-integration/session/Session.ts
index c60c5998bd8..4e69b2f7d6b 100644
--- a/packages/cli/src/acp-integration/session/Session.ts
+++ b/packages/cli/src/acp-integration/session/Session.ts
@@ -223,19 +223,19 @@ import { normalizeChannelDeliveryText } from '../../runtime/channel-delivery.js'
 import {
   CAPTURE_SCREEN_CONTEXT_TOOL_NAME,
   CaptureScreenContextTool,
-} from '../../serve/live/capture-screen-context.js';
+} from '../live/capture-screen-context.js';
 import {
   createLiveTaskTools,
   type LiveTaskTool,
-} from '../../serve/live/live-task-tools.js';
+} from '../live/live-task-tools.js';
 import {
   SPEAK_TO_USER_TOOL_NAME,
   SpeakToUserTool,
-} from '../../serve/live/live-speak-to-user.js';
+} from '../live/live-speak-to-user.js';
 import {
   LIVE_BACKEND_END_INSTRUCTIONS,
   LIVE_BACKEND_START_INSTRUCTIONS,
-} from '../../serve/live/live-backend-instructions.js';
+} from '../live/live-backend-instructions.js';
 import { readVoiceModel } from '../../services/voice-settings.js';
 import {
   MAX_AUDIO_BYTES,
diff --git a/packages/cli/src/serve/conversations/session-source.test.ts b/packages/cli/src/runtime/live-session-source.test.ts
similarity index 99%
rename from packages/cli/src/serve/conversations/session-source.test.ts
rename to packages/cli/src/runtime/live-session-source.test.ts
index f1e5ca33caa..b27e0dfa77f 100644
--- a/packages/cli/src/serve/conversations/session-source.test.ts
+++ b/packages/cli/src/runtime/live-session-source.test.ts
@@ -13,7 +13,7 @@ import {
   readLoadableLiveConversationMetadata,
   type ConversationSessionMetadataStore,
   type LiveSessionCreationMetadata,
-} from './session-source.js';
+} from './live-session-source.js';
 
 const LIVE_ID = '550e8400-e29b-41d4-a716-446655440000';
 const LIVE_CHILD_ID = '550e8400-e29b-41d4-a716-446655440001';
diff --git a/packages/cli/src/serve/conversations/session-source.ts b/packages/cli/src/runtime/live-session-source.ts
similarity index 99%
rename from packages/cli/src/serve/conversations/session-source.ts
rename to packages/cli/src/runtime/live-session-source.ts
index cae870144a0..28595f799ed 100644
--- a/packages/cli/src/serve/conversations/session-source.ts
+++ b/packages/cli/src/runtime/live-session-source.ts
@@ -7,7 +7,7 @@
 import {
   isValidSessionId,
   normalizeSessionIdForLookup,
-} from '../../config/session-id.js';
+} from '../config/session-id.js';
 
 export const LIVE_SESSION_SOURCE_PREFIX = 'realtime_voice:';
 export const STANDALONE_SESSION_SOURCE_TYPE = 'standalone';
diff --git a/packages/cli/src/serve/acp-http/dispatch.ts b/packages/cli/src/serve/acp-http/dispatch.ts
index 461cacfabd7..876400f2986 100644
--- a/packages/cli/src/serve/acp-http/dispatch.ts
+++ b/packages/cli/src/serve/acp-http/dispatch.ts
@@ -59,7 +59,7 @@ import {
   isReservedLiveSessionSource,
   isReservedStandaloneSessionSource,
   readLoadableLiveConversationMetadata,
-} from '../conversations/session-source.js';
+} from '../../runtime/live-session-source.js';
 import {
   translateAndCheckAbsoluteWorkspacePath,
   canonicalizeWorkspace,
diff --git a/packages/cli/src/serve/live/live-session-coordinator.ts b/packages/cli/src/serve/live/live-session-coordinator.ts
index 566f1c46b2f..7f566002400 100644
--- a/packages/cli/src/serve/live/live-session-coordinator.ts
+++ b/packages/cli/src/serve/live/live-session-coordinator.ts
@@ -42,10 +42,10 @@ import type { LiveProviderCredential } from './provider-credentials.js';
 import {
   isCompatibleLiveSessionSource,
   LIVE_SESSION_SOURCE_PREFIX,
-} from '../conversations/session-source.js';
+} from '../../runtime/live-session-source.js';
 import type { LiveProviderReadiness, LiveSessionLocator } from './types.js';
 
-export { LIVE_SESSION_SOURCE_PREFIX } from '../conversations/session-source.js';
+export { LIVE_SESSION_SOURCE_PREFIX } from '../../runtime/live-session-source.js';
 
 const MAX_COORDINATOR_REQUEST_CHARS = 32_000;
 const MAX_COORDINATOR_RESULT_CHARS = 48_000;
diff --git a/packages/cli/src/serve/live/live-task-service.test.ts b/packages/cli/src/serve/live/live-task-service.test.ts
index f955dce0bf7..43787c968f7 100644
--- a/packages/cli/src/serve/live/live-task-service.test.ts
+++ b/packages/cli/src/serve/live/live-task-service.test.ts
@@ -17,7 +17,7 @@ import type {
   WorkspaceRuntime,
 } from '../workspace-registry.js';
 import { isLiveTaskToolName, LiveTaskService } from './live-task-service.js';
-import { LIVE_SESSION_SOURCE_PREFIX } from '../conversations/session-source.js';
+import { LIVE_SESSION_SOURCE_PREFIX } from '../../runtime/live-session-source.js';
 
 const persistedSessions = vi.hoisted(() => new Map<string, unknown>());
 const persistedSessionOwners = vi.hoisted(() => new Map<string, string>());
diff --git a/packages/cli/src/serve/live/live-task-service.ts b/packages/cli/src/serve/live/live-task-service.ts
index 3b4364f9abe..f39209dfd85 100644
--- a/packages/cli/src/serve/live/live-task-service.ts
+++ b/packages/cli/src/serve/live/live-task-service.ts
@@ -39,7 +39,7 @@ import { laterActivityTimestamp } from '../server/activity-timestamp.js';
 import {
   isCompatibleLiveSessionSource,
   readLoadableLiveConversationMetadata,
-} from '../conversations/session-source.js';
+} from '../../runtime/live-session-source.js';
 import { conversationRuntimeUnavailableError } from '../conversations/conversation-runtime-errors.js';
 
 const DEFAULT_LIST_LIMIT = 20;
diff --git a/packages/cli/src/serve/multi-workspace-sessions.test.ts b/packages/cli/src/serve/multi-workspace-sessions.test.ts
index 3444c9af91a..e9744ef088d 100644
--- a/packages/cli/src/serve/multi-workspace-sessions.test.ts
+++ b/packages/cli/src/serve/multi-workspace-sessions.test.ts
@@ -40,7 +40,7 @@ import {
 } from './workspace-registry.js';
 import type { WorkspaceRuntimeProvenance } from './managed-scratch-workspace.js';
 import type { ConversationWorkspace } from './conversations/conversation-workspace.js';
-import { LIVE_SESSION_SOURCE_PREFIX } from './conversations/session-source.js';
+import { LIVE_SESSION_SOURCE_PREFIX } from '../runtime/live-session-source.js';
 import { createSessionOrganizationService } from './session-organization-helpers.js';
 import {
   serializeWorkspaceTranscriptResponseForTesting,
diff --git a/packages/cli/src/serve/routes/session.ts b/packages/cli/src/serve/routes/session.ts
index 010253e727b..d72d03dd31e 100644
--- a/packages/cli/src/serve/routes/session.ts
+++ b/packages/cli/src/serve/routes/session.ts
@@ -43,7 +43,7 @@ import {
   isReservedLiveSessionSource,
   isReservedStandaloneSessionSource,
   readLoadableLiveConversationMetadata,
-} from '../conversations/session-source.js';
+} from '../../runtime/live-session-source.js';
 import type { ConversationRuntimeActivityGate } from '../conversations/conversation-runtime-activity.js';
 import { ConversationRuntimeOwnershipError } from '../conversations/conversation-runtime-errors.js';
 import express, {
diff --git a/scripts/tests/acp-serve-boundary-guard.test.js b/scripts/tests/acp-serve-boundary-guard.test.js
new file mode 100644
index 00000000000..b8fbb05b6b2
--- /dev/null
+++ b/scripts/tests/acp-serve-boundary-guard.test.js
@@ -0,0 +1,103 @@
+/**
+ * @license
+ * Copyright 2026 Qwen Team
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { dirname, join } from 'node:path';
+import { fileURLToPath } from 'node:url';
+import { ESLint } from 'eslint';
+import { expect, it } from 'vitest';
+
+const root = join(dirname(fileURLToPath(import.meta.url)), '../..');
+
+const eslint = new ESLint({ cwd: root });
+
+// Static imports are reported by no-restricted-imports; dynamic import() is
+// reported by no-restricted-syntax because the former never sees it.
+const BOUNDARY_RULES = new Set([
+  'no-restricted-imports',
+  'no-restricted-syntax',
+]);
+
+async function restrictedReports(statement) {
+  const filePath = join(
+    root,
+    'packages/cli/src/acp-integration/boundary-probe.ts',
+  );
+  const [result] = await eslint.lintText(`${statement}\n`, { filePath });
+  return result.messages.filter((m) => BOUNDARY_RULES.has(m.ruleId));
+}
+
+// Bare-directory specifiers resolve to packages/cli/src/serve/index.ts, a
+// barrel re-exporting the full daemon surface — they must be caught by the
+// same guard that blocks deep serve/ internals (#8084).
+it.each(['../serve', '../../serve'])(
+  'blocks the bare barrel specifier %s from acp-integration',
+  async (specifier) => {
+    const reports = await restrictedReports(
+      `import { createServeApp } from '${specifier}';`,
+    );
+    expect(reports).toHaveLength(1);
+    expect(reports[0].message).toContain('acp-integration');
+  },
+);
+
+it('blocks a bare barrel re-export from acp-integration', async () => {
+  const reports = await restrictedReports(
+    `export { createServeApp } from '../serve';`,
+  );
+  expect(reports).toHaveLength(1);
+});
+
+it('still blocks deep serve/ internals from acp-integration', async () => {
+  const reports = await restrictedReports(
+    `import { createServeApp } from '../serve/index.js';`,
+  );
+  expect(reports).toHaveLength(1);
+});
+
+it('blocks type-only imports and re-exports from serve/ from acp-integration', async () => {
+  expect(
+    await restrictedReports(`import type { ServeAppDeps } from '../serve';`),
+  ).toHaveLength(1);
+  expect(
+    await restrictedReports(`export type { ServeAppDeps } from '../serve';`),
+  ).toHaveLength(1);
+});
+
+it('blocks a dynamic import() of serve/ from acp-integration', async () => {
+  const reports = await restrictedReports(
+    `async function probe() { await import('../serve/index.js'); }`,
+  );
+  expect(reports).toHaveLength(1);
+  expect(reports[0].message).toContain('acp-integration');
+});
+
+it('blocks a case-variant dynamic import() of Serve/ from acp-integration', async () => {
+  const reports = await restrictedReports(
+    `async function probe() { await import('../Serve/index.js'); }`,
+  );
+  expect(reports).toHaveLength(1);
+});
+
+it('allows neutral runtime/ contracts from acp-integration', async () => {
+  expect(
+    await restrictedReports(
+      `import { something } from '../runtime/contracts.js';`,
+    ),
+  ).toHaveLength(0);
+  expect(
+    await restrictedReports(
+      `async function probe() { await import('../runtime/contracts.js'); }`,
+    ),
+  ).toHaveLength(0);
+  // A computed specifier (not a string literal) has no source.value, so the
+  // dynamic guard must not reject it — the import target is unknowable at
+  // lint time.
+  expect(
+    await restrictedReports(
+      `async function probe() { const target = '../runtime/contracts.js'; await import(target); }`,
+    ),
+  ).toHaveLength(0);
+});
diff --git a/scripts/tests/cross-package-contracts.test.js b/scripts/tests/cross-package-contracts.test.js
index e9a47fe80a8..ce3afc86f8a 100644
--- a/scripts/tests/cross-package-contracts.test.js
+++ b/scripts/tests/cross-package-contracts.test.js
@@ -55,7 +55,7 @@ const imports = [
   ],
   [
     'LIVE_TASK_TOOL_NAMES',
-    'packages/cli/src/serve/live/live-task-tools.ts',
+    'packages/cli/src/acp-integration/live/live-task-tools.ts',
     '@qwen-code/acp-bridge/bridgeOptions',
   ],
   [
@@ -65,7 +65,7 @@ const imports = [
   ],
   [
     'LiveTaskToolName',
-    'packages/cli/src/serve/live/live-task-tools.ts',
+    'packages/cli/src/acp-integration/live/live-task-tools.ts',
     '@qwen-code/acp-bridge/bridgeOptions',
   ],
   [