diff --git a/napi/angular-compiler/test/linker.test.ts b/napi/angular-compiler/test/linker.test.ts
new file mode 100644
index 000000000..11ec34525
--- /dev/null
+++ b/napi/angular-compiler/test/linker.test.ts
@@ -0,0 +1,199 @@
+import { describe, it, expect } from 'vitest'
+
+import { linkAngularPackageSync } from '../index.js'
+
+/**
+ * Minimal Angular partial declaration fixtures that simulate the structure
+ * of FESM bundle files (including Angular 21+ chunk files).
+ * Uses actual Unicode ɵ (U+0275) characters as they appear in real Angular packages.
+ */
+const INJECTABLE_CHUNK = `
+import * as i0 from '@angular/core';
+
+class PlatformLocation {
+  historyGo(relativePosition) {
+    throw new Error('Not implemented');
+  }
+  static \u0275fac = i0.\u0275\u0275ngDeclareFactory({
+    minVersion: "12.0.0",
+    version: "21.0.0",
+    ngImport: i0,
+    type: PlatformLocation,
+    deps: [],
+    target: i0.\u0275\u0275FactoryTarget.Injectable
+  });
+  static \u0275prov = i0.\u0275\u0275ngDeclareInjectable({
+    minVersion: "12.0.0",
+    version: "21.0.0",
+    ngImport: i0,
+    type: PlatformLocation,
+    providedIn: "platform",
+    useClass: undefined
+  });
+}
+
+export { PlatformLocation };
+`
+
+const NG_MODULE_CHUNK = `
+import * as i0 from '@angular/core';
+
+class CommonModule {
+  static \u0275fac = i0.\u0275\u0275ngDeclareFactory({
+    minVersion: "12.0.0",
+    version: "21.0.0",
+    ngImport: i0,
+    type: CommonModule,
+    deps: [],
+    target: i0.\u0275\u0275FactoryTarget.NgModule
+  });
+  static \u0275mod = i0.\u0275\u0275ngDeclareNgModule({
+    minVersion: "14.0.0",
+    version: "21.0.0",
+    ngImport: i0,
+    type: CommonModule,
+    imports: [],
+    exports: []
+  });
+  static \u0275inj = i0.\u0275\u0275ngDeclareInjector({
+    minVersion: "12.0.0",
+    version: "21.0.0",
+    ngImport: i0,
+    type: CommonModule
+  });
+}
+
+export { CommonModule };
+`
+
+const PIPE_CHUNK = `
+import * as i0 from '@angular/core';
+
+class AsyncPipe {
+  constructor(ref) {
+    this._ref = ref;
+  }
+  static \u0275fac = i0.\u0275\u0275ngDeclareFactory({
+    minVersion: "12.0.0",
+    version: "21.0.0",
+    ngImport: i0,
+    type: AsyncPipe,
+    deps: [{ token: i0.ChangeDetectorRef }],
+    target: i0.\u0275\u0275FactoryTarget.Pipe
+  });
+  static \u0275pipe = i0.\u0275\u0275ngDeclarePipe({
+    minVersion: "14.0.0",
+    version: "21.0.0",
+    ngImport: i0,
+    type: AsyncPipe,
+    isStandalone: false,
+    name: "async",
+    pure: false
+  });
+}
+
+export { AsyncPipe };
+`
+
+describe('Angular linker - chunk file linking', () => {
+  it('should link \u0275\u0275ngDeclareFactory and \u0275\u0275ngDeclareInjectable', () => {
+    const result = linkAngularPackageSync(
+      INJECTABLE_CHUNK,
+      'node_modules/@angular/common/fesm2022/_platform_location-chunk.mjs',
+    )
+
+    expect(result.linked).toBe(true)
+    expect(result.code).not.toContain('\u0275\u0275ngDeclare')
+  })
+
+  it('should link \u0275\u0275ngDeclareNgModule and \u0275\u0275ngDeclareInjector', () => {
+    const result = linkAngularPackageSync(
+      NG_MODULE_CHUNK,
+      'node_modules/@angular/common/fesm2022/_common_module-chunk.mjs',
+    )
+
+    expect(result.linked).toBe(true)
+    expect(result.code).not.toContain('\u0275\u0275ngDeclare')
+  })
+
+  it('should link \u0275\u0275ngDeclarePipe', () => {
+    const result = linkAngularPackageSync(
+      PIPE_CHUNK,
+      'node_modules/@angular/common/fesm2022/_pipes-chunk.mjs',
+    )
+
+    expect(result.linked).toBe(true)
+    expect(result.code).not.toContain('\u0275\u0275ngDeclare')
+  })
+
+  it('should return linked: false for files without declarations', () => {
+    const code = `
+      export function helper() { return 42; }
+    `
+    const result = linkAngularPackageSync(
+      code,
+      'node_modules/@angular/common/fesm2022/_utils-chunk.mjs',
+    )
+
+    expect(result.linked).toBe(false)
+  })
+})
+
+describe('NODE_MODULES_JS_REGEX filter matching', () => {
+  // This is the fixed regex from angular-linker-plugin.ts
+  const NODE_MODULES_JS_REGEX = /node_modules[\\/].*\.[cm]?js(?:\?.*)?$/
+
+  it('should match standard Angular FESM files', () => {
+    expect(NODE_MODULES_JS_REGEX.test('node_modules/@angular/common/fesm2022/common.mjs')).toBe(
+      true,
+    )
+  })
+
+  it('should match chunk files', () => {
+    expect(
+      NODE_MODULES_JS_REGEX.test(
+        'node_modules/@angular/common/fesm2022/_platform_location-chunk.mjs',
+      ),
+    ).toBe(true)
+  })
+
+  it('should match absolute paths', () => {
+    expect(
+      NODE_MODULES_JS_REGEX.test(
+        '/Users/dev/project/node_modules/@angular/common/fesm2022/_platform_location-chunk.mjs',
+      ),
+    ).toBe(true)
+  })
+
+  it('should match paths with Vite query strings', () => {
+    expect(
+      NODE_MODULES_JS_REGEX.test('node_modules/@angular/common/fesm2022/common.mjs?v=abc123'),
+    ).toBe(true)
+  })
+
+  it('should match chunk files with Vite query strings', () => {
+    expect(
+      NODE_MODULES_JS_REGEX.test(
+        'node_modules/@angular/common/fesm2022/_platform_location-chunk.mjs?v=df7b0864',
+      ),
+    ).toBe(true)
+  })
+
+  it('should match Windows-style backslash paths', () => {
+    expect(NODE_MODULES_JS_REGEX.test('node_modules\\@angular\\common\\fesm2022\\common.mjs')).toBe(
+      true,
+    )
+  })
+
+  it('should match .js and .cjs files', () => {
+    expect(NODE_MODULES_JS_REGEX.test('node_modules/@ngrx/store/fesm2022/ngrx-store.js')).toBe(true)
+    expect(NODE_MODULES_JS_REGEX.test('node_modules/some-lib/index.cjs')).toBe(true)
+  })
+
+  it('should not match non-JS files', () => {
+    expect(NODE_MODULES_JS_REGEX.test('node_modules/@angular/common/fesm2022/common.d.ts')).toBe(
+      false,
+    )
+    expect(NODE_MODULES_JS_REGEX.test('src/app/app.component.ts')).toBe(false)
+  })
+})
diff --git a/napi/angular-compiler/vite-plugin/angular-linker-plugin.ts b/napi/angular-compiler/vite-plugin/angular-linker-plugin.ts
index 8e38315dc..551b44ee6 100644
--- a/napi/angular-compiler/vite-plugin/angular-linker-plugin.ts
+++ b/napi/angular-compiler/vite-plugin/angular-linker-plugin.ts
@@ -25,7 +25,8 @@ const LINKER_DECLARATION_PREFIX = '\u0275\u0275ngDeclare'
 const SKIP_REGEX = /[\\/]@angular[\\/](?:compiler|core)[\\/]/
 
 // Match JS files in node_modules (Angular FESM bundles)
-const NODE_MODULES_JS_REGEX = /node_modules\/.*\.[cm]?js$/
+// Allows optional query strings (?v=...) that Vite appends to module IDs
+const NODE_MODULES_JS_REGEX = /node_modules[\\/].*\.[cm]?js(?:\?.*)?$/
 
 /**
  * Run the OXC Rust linker on the given code.