diff --git a/packages/twenty-sdk/src/cli/utilities/build/manifest/__tests__/manifest-extract-config-from-file.spec.ts b/packages/twenty-sdk/src/cli/utilities/build/manifest/__tests__/manifest-extract-config-from-file.spec.ts
new file mode 100644
index 0000000000..641cdd21a8
--- /dev/null
+++ b/packages/twenty-sdk/src/cli/utilities/build/manifest/__tests__/manifest-extract-config-from-file.spec.ts
@@ -0,0 +1,43 @@
+import { createRequire } from 'module';
+import { join } from 'path';
+
+import { MINIMAL_APP_PATH } from '@/cli/__tests__/apps/fixture-paths';
+import { extractManifestFromFile } from '@/cli/utilities/build/manifest/manifest-extract-config-from-file';
+import { type ApplicationConfig } from '@/sdk/define';
+
+describe('extractManifestFromFile', () => {
+  const filePath = join(MINIMAL_APP_PATH, 'application.config.ts');
+
+  it('extracts the default-exported config from a bundled entity file', async () => {
+    const result = await extractManifestFromFile<ApplicationConfig>({
+      filePath,
+      appPath: MINIMAL_APP_PATH,
+    });
+
+    expect(result.config.displayName).toBe('Root App');
+  }, 60000);
+
+  // Regression test for the dev-mode OOM crash: bundled entity modules used to be
+  // written to disk and required, leaking one fully-bundled module per file into
+  // the require cache on every rebuild. Evaluating in memory keeps it bounded.
+  it('does not grow the require cache across rebuilds', async () => {
+    const requireCache = createRequire(import.meta.url).cache;
+
+    // Warm up so first-time dependency loads don't count against the assertion.
+    await extractManifestFromFile<ApplicationConfig>({
+      filePath,
+      appPath: MINIMAL_APP_PATH,
+    });
+
+    const before = Object.keys(requireCache).length;
+
+    for (let index = 0; index < 5; index++) {
+      await extractManifestFromFile<ApplicationConfig>({
+        filePath,
+        appPath: MINIMAL_APP_PATH,
+      });
+    }
+
+    expect(Object.keys(requireCache).length).toBe(before);
+  }, 60000);
+});
diff --git a/packages/twenty-sdk/src/cli/utilities/build/manifest/manifest-extract-config-from-file.ts b/packages/twenty-sdk/src/cli/utilities/build/manifest/manifest-extract-config-from-file.ts
index dd26ddc102..bf547162fc 100644
--- a/packages/twenty-sdk/src/cli/utilities/build/manifest/manifest-extract-config-from-file.ts
+++ b/packages/twenty-sdk/src/cli/utilities/build/manifest/manifest-extract-config-from-file.ts
@@ -1,13 +1,20 @@
 import { conditionalAvailabilityTransformPlugin } from '@/cli/utilities/build/common/conditional-availability/conditional-availability-transform-plugin';
-import { pathExists, remove } from '@/cli/utilities/file/fs-utils';
+import { pathExists } from '@/cli/utilities/file/fs-utils';
 import { type ValidationResult } from '@/sdk/define';
 import * as esbuild from 'esbuild';
 import { createRequire } from 'module';
-import { mkdtemp, writeFile } from 'node:fs/promises';
-import os from 'os';
+import vm from 'node:vm';
 import path from 'path';
 import { isDefined, isPlainObject } from 'twenty-shared/utils';
 
+type CompiledModuleWrapper = (
+  exports: Record<string, unknown>,
+  require: NodeRequire,
+  module: { exports: Record<string, unknown> },
+  filename: string,
+  dirname: string,
+) => void;
+
 const MANIFEST_MOCK_MODULES = [
   'twenty-sdk/ui',
   'twenty-client-sdk/core',
@@ -86,16 +93,23 @@ const loadModule = async ({
 
   const code = result.outputFiles[0].text;
 
-  const tempDir = await mkdtemp(path.join(os.tmpdir(), 'twenty-manifest-'));
-  const tempFile = path.join(tempDir, 'module.cjs');
+  const compiledWrapper = vm.compileFunction(
+    code,
+    ['exports', 'require', 'module', '__filename', '__dirname'],
+    { filename: filePath },
+  ) as unknown as CompiledModuleWrapper;
 
-  try {
-    await writeFile(tempFile, code);
+  const moduleShim: { exports: Record<string, unknown> } = { exports: {} };
 
-    return appRequire(tempFile) as Record<string, unknown>;
-  } finally {
-    await remove(tempDir);
-  }
+  compiledWrapper(
+    moduleShim.exports,
+    appRequire,
+    moduleShim,
+    filePath,
+    path.dirname(filePath),
+  );
+
+  return moduleShim.exports;
 };
 
 const extractDefaultConfigFromModuleOrThrow = <T>(