diff --git a/extensions/browser/src/browser/runtime-lifecycle.ts b/extensions/browser/src/browser/runtime-lifecycle.ts
index 7b181faea6e..87602ff281e 100644
--- a/extensions/browser/src/browser/runtime-lifecycle.ts
+++ b/extensions/browser/src/browser/runtime-lifecycle.ts
@@ -1,4 +1,5 @@
 import type { Server } from "node:http";
+import { getPwAiModule } from "./pw-ai-module.js";
 import { isPwAiLoaded } from "./pw-ai-state.js";
 import type { BrowserServerState } from "./server-context.js";
 import { ensureExtensionRelayForProfiles, stopKnownBrowserProfiles } from "./server-lifecycle.js";
@@ -52,8 +53,8 @@ export async function stopBrowserRuntime(params: {
     return;
   }
   try {
-    const mod = await import("./pw-ai.js");
-    await mod.closePlaywrightBrowserConnection();
+    const mod = await getPwAiModule({ mode: "soft" });
+    await mod?.closePlaywrightBrowserConnection();
   } catch {
     // ignore
   }
diff --git a/extensions/browser/src/browser/server-context.lifecycle.ts b/extensions/browser/src/browser/server-context.lifecycle.ts
index 17af693d73f..4399cb2bde6 100644
--- a/extensions/browser/src/browser/server-context.lifecycle.ts
+++ b/extensions/browser/src/browser/server-context.lifecycle.ts
@@ -1,5 +1,6 @@
 import type { ResolvedBrowserProfile } from "./config.js";
 import { getBrowserProfileCapabilities } from "./profile-capabilities.js";
+import { getPwAiModule } from "./pw-ai-module.js";
 
 export function resolveIdleProfileStopOutcome(profile: ResolvedBrowserProfile): {
   stopped: boolean;
@@ -20,8 +21,8 @@ export function resolveIdleProfileStopOutcome(profile: ResolvedBrowserProfile):
 
 export async function closePlaywrightBrowserConnectionForProfile(cdpUrl?: string): Promise<void> {
   try {
-    const mod = await import("./pw-ai.js");
-    await mod.closePlaywrightBrowserConnection(cdpUrl ? { cdpUrl } : undefined);
+    const mod = await getPwAiModule({ mode: "soft" });
+    await mod?.closePlaywrightBrowserConnection(cdpUrl ? { cdpUrl } : undefined);
   } catch {
     // ignore
   }
diff --git a/extensions/browser/src/browser/server-context.reset.ts b/extensions/browser/src/browser/server-context.reset.ts
index ea478f56f31..c5bb2e567f5 100644
--- a/extensions/browser/src/browser/server-context.reset.ts
+++ b/extensions/browser/src/browser/server-context.reset.ts
@@ -2,6 +2,7 @@ import fs from "node:fs";
 import type { ResolvedBrowserProfile } from "./config.js";
 import { BrowserResetUnsupportedError } from "./errors.js";
 import { getBrowserProfileCapabilities } from "./profile-capabilities.js";
+import { getPwAiModule } from "./pw-ai-module.js";
 import type { ProfileRuntimeState } from "./server-context.types.js";
 import { movePathToTrash } from "./trash.js";
 
@@ -19,8 +20,8 @@ type ResetOps = {
 
 async function closePlaywrightBrowserConnectionForProfile(cdpUrl?: string): Promise<void> {
   try {
-    const mod = await import("./pw-ai.js");
-    await mod.closePlaywrightBrowserConnection(cdpUrl ? { cdpUrl } : undefined);
+    const mod = await getPwAiModule({ mode: "soft" });
+    await mod?.closePlaywrightBrowserConnection(cdpUrl ? { cdpUrl } : undefined);
   } catch {
     // ignore
   }
diff --git a/extensions/voice-call/src/webhook.ts b/extensions/voice-call/src/webhook.ts
index 441bd23023c..e3cbbc0ad32 100644
--- a/extensions/voice-call/src/webhook.ts
+++ b/extensions/voice-call/src/webhook.ts
@@ -31,6 +31,22 @@ const WEBHOOK_BODY_TIMEOUT_MS = WEBHOOK_BODY_READ_DEFAULTS.preAuth.timeoutMs;
 const STREAM_DISCONNECT_HANGUP_GRACE_MS = 2000;
 const TRANSCRIPT_LOG_MAX_CHARS = 200;
 
+type RealtimeTranscriptionRuntime = typeof import("./realtime-transcription.runtime.js");
+type ResponseGeneratorModule = typeof import("./response-generator.js");
+
+let realtimeTranscriptionRuntimePromise: Promise<RealtimeTranscriptionRuntime> | undefined;
+let responseGeneratorModulePromise: Promise<ResponseGeneratorModule> | undefined;
+
+function loadRealtimeTranscriptionRuntime(): Promise<RealtimeTranscriptionRuntime> {
+  realtimeTranscriptionRuntimePromise ??= import("./realtime-transcription.runtime.js");
+  return realtimeTranscriptionRuntimePromise;
+}
+
+function loadResponseGeneratorModule(): Promise<ResponseGeneratorModule> {
+  responseGeneratorModulePromise ??= import("./response-generator.js");
+  return responseGeneratorModulePromise;
+}
+
 type WebhookHeaderGateResult =
   | { ok: true }
   | {
@@ -233,7 +249,7 @@ export class VoiceCallWebhookServer {
     const pluginConfig =
       this.fullConfig ?? (this.coreConfig as unknown as OpenClawConfig | undefined);
     const { getRealtimeTranscriptionProvider, listRealtimeTranscriptionProviders } =
-      await import("./realtime-transcription.runtime.js");
+      await loadRealtimeTranscriptionRuntime();
     const resolution = resolveConfiguredCapabilityProvider({
       configuredProviderId: streaming.provider,
       providerConfigs: streaming.providers,
@@ -762,7 +778,7 @@ export class VoiceCallWebhookServer {
     }
 
     try {
-      const { generateVoiceResponse } = await import("./response-generator.js");
+      const { generateVoiceResponse } = await loadResponseGeneratorModule();
 
       const result = await generateVoiceResponse({
         voiceConfig: this.config,
diff --git a/extensions/xai/index.ts b/extensions/xai/index.ts
index ce35dd0e56b..2d56fa9731a 100644
--- a/extensions/xai/index.ts
+++ b/extensions/xai/index.ts
@@ -25,14 +25,21 @@ import {
 
 const PROVIDER_ID = "xai";
 type CodeExecutionModule = typeof import("./code-execution.js");
+type XSearchModule = typeof import("./x-search.js");
 
 let codeExecutionModulePromise: Promise<CodeExecutionModule> | undefined;
+let xSearchModulePromise: Promise<XSearchModule> | undefined;
 
 function loadCodeExecutionModule(): Promise<CodeExecutionModule> {
   codeExecutionModulePromise ??= import("./code-execution.js");
   return codeExecutionModulePromise;
 }
 
+function loadXSearchModule(): Promise<XSearchModule> {
+  xSearchModulePromise ??= import("./x-search.js");
+  return xSearchModulePromise;
+}
+
 function hasResolvableXaiApiKey(config: unknown): boolean {
   return Boolean(
     resolveFallbackXaiAuth(config as never)?.apiKey || readProviderEnvValue(["XAI_API_KEY"]),
@@ -126,7 +133,7 @@ function createLazyXSearchTool(ctx: {
   }
 
   return createXSearchToolDefinition(async (toolCallId: string, args: Record<string, unknown>) => {
-    const { createXSearchTool } = await import("./x-search.js");
+    const { createXSearchTool } = await loadXSearchModule();
     const tool = createXSearchTool({
       config: ctx.config as never,
       runtimeConfig: (ctx.runtimeConfig as never) ?? null,