diff --git a/packages/vinext/src/entries/pages-server-entry.ts b/packages/vinext/src/entries/pages-server-entry.ts
index 498f4cb4f..651086167 100644
--- a/packages/vinext/src/entries/pages-server-entry.ts
+++ b/packages/vinext/src/entries/pages-server-entry.ts
@@ -45,6 +45,10 @@ const _pagesNodeCompatPath = fileURLToPath(
 const _pagesApiRoutePath = fileURLToPath(
   new URL("../server/pages-api-route.js", import.meta.url),
 ).replace(/\\/g, "/");
+const _isrCachePath = fileURLToPath(new URL("../server/isr-cache.js", import.meta.url)).replace(
+  /\\/g,
+  "/",
+);
 
 /**
  * Generate the virtual SSR server entry module.
@@ -275,7 +279,7 @@ import { renderToReadableStream } from "react-dom/server.edge";
 import { resetSSRHead, getSSRHeadHTML } from "next/head";
 import { flushPreloads } from "next/dynamic";
 import { setSSRContext, wrapWithRouterContext } from "next/router";
-import { getCacheHandler, _runWithCacheState } from "next/cache";
+import { _runWithCacheState } from "next/cache";
 import { runWithPrivateCache } from "vinext/cache-runtime";
 import { ensureFetchPatch, runWithFetchCache } from "vinext/fetch-cache";
 import { runWithRequestContext as _runWithUnifiedCtx, createRequestContext as _createUnifiedCtx } from "vinext/unified-request-context";
@@ -294,6 +298,12 @@ import { reportRequestError as _reportRequestError } from "vinext/instrumentatio
 import { resolvePagesI18nRequest } from ${JSON.stringify(_pagesI18nPath)};
 import { createPagesReqRes as __createPagesReqRes } from ${JSON.stringify(_pagesNodeCompatPath)};
 import { handlePagesApiRoute as __handlePagesApiRoute } from ${JSON.stringify(_pagesApiRoutePath)};
+import {
+  isrGet as __sharedIsrGet,
+  isrSet as __sharedIsrSet,
+  isrCacheKey as __sharedIsrCacheKey,
+  triggerBackgroundRegeneration as __sharedTriggerBackgroundRegeneration,
+} from ${JSON.stringify(_isrCachePath)};
 import { resolvePagesPageData as __resolvePagesPageData } from ${JSON.stringify(_pagesPageDataPath)};
 import { renderPagesPageResponse as __renderPagesPageResponse } from ${JSON.stringify(_pagesPageResponsePath)};
 ${instrumentationImportCode}
@@ -310,51 +320,17 @@ const buildId = ${buildIdJson};
 // Full resolved config for production server (embedded at build time)
 export const vinextConfig = ${vinextConfigJson};
 
-// ISR cache helpers (inlined for the server entry)
-async function isrGet(key) {
-  const handler = getCacheHandler();
-  const result = await handler.get(key);
-  if (!result || !result.value) return null;
-  return { value: result, isStale: result.cacheState === "stale" };
+function isrGet(key) {
+  return __sharedIsrGet(key);
 }
-async function isrSet(key, data, revalidateSeconds, tags) {
-  const handler = getCacheHandler();
-  await handler.set(key, data, { revalidate: revalidateSeconds, tags: tags || [] });
+function isrSet(key, data, revalidateSeconds, tags) {
+  return __sharedIsrSet(key, data, revalidateSeconds, tags);
 }
-const pendingRegenerations = new Map();
 function triggerBackgroundRegeneration(key, renderFn) {
-  if (pendingRegenerations.has(key)) return;
-  const promise = renderFn()
-    .catch((err) => console.error("[vinext] ISR regen failed for " + key + ":", err))
-    .finally(() => pendingRegenerations.delete(key));
-  pendingRegenerations.set(key, promise);
-  // Register with the Workers ExecutionContext so the isolate is kept alive
-  // until the regeneration finishes, even after the Response has been sent.
-  const ctx = _getRequestExecutionContext();
-  if (ctx && typeof ctx.waitUntil === "function") ctx.waitUntil(promise);
-}
-
-function fnv1a64(input) {
-  let h1 = 0x811c9dc5;
-  for (let i = 0; i < input.length; i++) {
-    h1 ^= input.charCodeAt(i);
-    h1 = (h1 * 0x01000193) >>> 0;
-  }
-  let h2 = 0x050c5d1f;
-  for (let i = 0; i < input.length; i++) {
-    h2 ^= input.charCodeAt(i);
-    h2 = (h2 * 0x01000193) >>> 0;
-  }
-  return h1.toString(36) + h2.toString(36);
+  return __sharedTriggerBackgroundRegeneration(key, renderFn);
 }
-// Keep prefix construction and hashing logic in sync with isrCacheKey() in server/isr-cache.ts.
-// buildId is a top-level const in the generated entry (see "const buildId = ..." above).
 function isrCacheKey(router, pathname) {
-  const normalized = pathname === "/" ? "/" : pathname.replace(/\\/$/, "");
-  const prefix = buildId ? router + ":" + buildId : router;
-  const key = prefix + ":" + normalized;
-  if (key.length <= 200) return key;
-  return prefix + ":__hash:" + fnv1a64(normalized);
+  return __sharedIsrCacheKey(router, pathname, buildId || undefined);
 }
 
 async function renderToStringAsync(element) {
diff --git a/tests/__snapshots__/entry-templates.test.ts.snap b/tests/__snapshots__/entry-templates.test.ts.snap
index 0d2b831ec..b830f13ee 100644
--- a/tests/__snapshots__/entry-templates.test.ts.snap
+++ b/tests/__snapshots__/entry-templates.test.ts.snap
@@ -13687,7 +13687,7 @@ import { renderToReadableStream } from "react-dom/server.edge";
 import { resetSSRHead, getSSRHeadHTML } from "next/head";
 import { flushPreloads } from "next/dynamic";
 import { setSSRContext, wrapWithRouterContext } from "next/router";
-import { getCacheHandler, _runWithCacheState } from "next/cache";
+import { _runWithCacheState } from "next/cache";
 import { runWithPrivateCache } from "vinext/cache-runtime";
 import { ensureFetchPatch, runWithFetchCache } from "vinext/fetch-cache";
 import { runWithRequestContext as _runWithUnifiedCtx, createRequestContext as _createUnifiedCtx } from "vinext/unified-request-context";
@@ -13706,6 +13706,12 @@ import { reportRequestError as _reportRequestError } from "vinext/instrumentatio
 import { resolvePagesI18nRequest } from "<ROOT>/packages/vinext/src/server/pages-i18n.js";
 import { createPagesReqRes as __createPagesReqRes } from "<ROOT>/packages/vinext/src/server/pages-node-compat.js";
 import { handlePagesApiRoute as __handlePagesApiRoute } from "<ROOT>/packages/vinext/src/server/pages-api-route.js";
+import {
+  isrGet as __sharedIsrGet,
+  isrSet as __sharedIsrSet,
+  isrCacheKey as __sharedIsrCacheKey,
+  triggerBackgroundRegeneration as __sharedTriggerBackgroundRegeneration,
+} from "<ROOT>/packages/vinext/src/server/isr-cache.js";
 import { resolvePagesPageData as __resolvePagesPageData } from "<ROOT>/packages/vinext/src/server/pages-page-data.js";
 import { renderPagesPageResponse as __renderPagesPageResponse } from "<ROOT>/packages/vinext/src/server/pages-page-response.js";
 import * as _instrumentation from "<ROOT>/tests/fixtures/pages-basic/instrumentation.ts";
@@ -13733,51 +13739,17 @@ const buildId = "test-build-id";
 // Full resolved config for production server (embedded at build time)
 export const vinextConfig = {"basePath":"","trailingSlash":false,"redirects":[{"source":"/old-about","destination":"/about","permanent":true},{"source":"/repeat-redirect/:id","destination":"/docs/:id/:id","permanent":false},{"source":"/redirect-before-middleware-rewrite","destination":"/about","permanent":false},{"source":"/redirect-before-middleware-response","destination":"/about","permanent":false}],"rewrites":{"beforeFiles":[{"source":"/before-rewrite","destination":"/about"},{"source":"/repeat-rewrite/:id","destination":"/docs/:id/:id"},{"source":"/mw-gated-before","has":[{"type":"cookie","key":"mw-before-user"}],"destination":"/about"}],"afterFiles":[{"source":"/after-rewrite","destination":"/about"},{"source":"/mw-gated-rewrite","has":[{"type":"cookie","key":"mw-user"}],"destination":"/about"}],"fallback":[{"source":"/fallback-rewrite","destination":"/about"}]},"headers":[{"source":"/api/(.*)","headers":[{"key":"X-Custom-Header","value":"vinext"}]},{"source":"/about","has":[{"type":"cookie","key":"logged-in"}],"headers":[{"key":"X-Auth-Only-Header","value":"1"}]},{"source":"/about","missing":[{"type":"cookie","key":"logged-in"}],"headers":[{"key":"X-Guest-Only-Header","value":"1"}]},{"source":"/ssr","headers":[{"key":"Vary","value":"Accept-Language"}]},{"source":"/headers-before-middleware-rewrite","headers":[{"key":"X-Rewrite-Source-Header","value":"1"}]}],"i18n":null,"images":{}};
 
-// ISR cache helpers (inlined for the server entry)
-async function isrGet(key) {
-  const handler = getCacheHandler();
-  const result = await handler.get(key);
-  if (!result || !result.value) return null;
-  return { value: result, isStale: result.cacheState === "stale" };
+function isrGet(key) {
+  return __sharedIsrGet(key);
 }
-async function isrSet(key, data, revalidateSeconds, tags) {
-  const handler = getCacheHandler();
-  await handler.set(key, data, { revalidate: revalidateSeconds, tags: tags || [] });
+function isrSet(key, data, revalidateSeconds, tags) {
+  return __sharedIsrSet(key, data, revalidateSeconds, tags);
 }
-const pendingRegenerations = new Map();
 function triggerBackgroundRegeneration(key, renderFn) {
-  if (pendingRegenerations.has(key)) return;
-  const promise = renderFn()
-    .catch((err) => console.error("[vinext] ISR regen failed for " + key + ":", err))
-    .finally(() => pendingRegenerations.delete(key));
-  pendingRegenerations.set(key, promise);
-  // Register with the Workers ExecutionContext so the isolate is kept alive
-  // until the regeneration finishes, even after the Response has been sent.
-  const ctx = _getRequestExecutionContext();
-  if (ctx && typeof ctx.waitUntil === "function") ctx.waitUntil(promise);
+  return __sharedTriggerBackgroundRegeneration(key, renderFn);
 }
-
-function fnv1a64(input) {
-  let h1 = 0x811c9dc5;
-  for (let i = 0; i < input.length; i++) {
-    h1 ^= input.charCodeAt(i);
-    h1 = (h1 * 0x01000193) >>> 0;
-  }
-  let h2 = 0x050c5d1f;
-  for (let i = 0; i < input.length; i++) {
-    h2 ^= input.charCodeAt(i);
-    h2 = (h2 * 0x01000193) >>> 0;
-  }
-  return h1.toString(36) + h2.toString(36);
-}
-// Keep prefix construction and hashing logic in sync with isrCacheKey() in server/isr-cache.ts.
-// buildId is a top-level const in the generated entry (see "const buildId = ..." above).
 function isrCacheKey(router, pathname) {
-  const normalized = pathname === "/" ? "/" : pathname.replace(/\\/$/, "");
-  const prefix = buildId ? router + ":" + buildId : router;
-  const key = prefix + ":" + normalized;
-  if (key.length <= 200) return key;
-  return prefix + ":__hash:" + fnv1a64(normalized);
+  return __sharedIsrCacheKey(router, pathname, buildId || undefined);
 }
 
 async function renderToStringAsync(element) {
diff --git a/tests/entry-templates.test.ts b/tests/entry-templates.test.ts
index ef81e4dae..3e1fd6e37 100644
--- a/tests/entry-templates.test.ts
+++ b/tests/entry-templates.test.ts
@@ -283,13 +283,16 @@ describe("Pages Router entry templates", () => {
     expect(stabilize(code)).toContain("trieMatch");
   });
 
-  it("server entry eagerly starts ISR regeneration before waitUntil registration", async () => {
+  it("server entry delegates Pages ISR cache plumbing to shared helpers", async () => {
     const code = await getVirtualModuleCode("virtual:vinext-server-entry");
-    const renderFnCall = code.indexOf("const promise = renderFn()");
-    const waitUntilCall = code.indexOf("ctx.waitUntil(promise)");
-
-    expect(renderFnCall).toBeGreaterThan(-1);
-    expect(waitUntilCall).toBeGreaterThan(renderFnCall);
+    const stableCode = stabilize(code);
+
+    expect(stableCode).toContain('from "<ROOT>/packages/vinext/src/server/isr-cache.js";');
+    expect(code).toContain("function isrGet(key) {");
+    expect(code).toContain("return __sharedIsrGet(key);");
+    expect(code).toContain("return __sharedTriggerBackgroundRegeneration(key, renderFn);");
+    expect(code).not.toContain("const promise = renderFn()");
+    expect(code).not.toContain("ctx.waitUntil(promise)");
   });
 
   it("server entry seeds the main Pages Router unified context with executionContext", async () => {
@@ -331,8 +334,18 @@ describe("Pages Router entry templates", () => {
     const code = await getVirtualModuleCode("virtual:vinext-server-entry");
 
     expect(code).toContain("resolvePagesPageData as __resolvePagesPageData");
+    expect(code).toContain("isrGet as __sharedIsrGet");
+    expect(code).toContain("isrSet as __sharedIsrSet");
+    expect(code).toContain("isrCacheKey as __sharedIsrCacheKey");
+    expect(code).toContain(
+      "triggerBackgroundRegeneration as __sharedTriggerBackgroundRegeneration",
+    );
     expect(code).toContain("const pageDataResult = await __resolvePagesPageData({");
-    expect(code).not.toContain("triggerBackgroundRegeneration(cacheKey, async function()");
+    expect(code).toContain("return __sharedTriggerBackgroundRegeneration(key, renderFn);");
+    expect(code).not.toContain("async function isrGet(key)");
+    expect(code).not.toContain("async function isrSet(key, data, revalidateSeconds, tags)");
+    expect(code).not.toContain("const pendingRegenerations = new Map();");
+    expect(code).not.toContain("function fnv1a64(input)");
     expect(code).not.toContain("const result = await pageModule.getServerSideProps(ctx);");
     expect(code).not.toContain("const result = await pageModule.getStaticProps(ctx);");
   });