diff --git a/packages/vite/helpers/global-defines.spec.ts b/packages/vite/helpers/global-defines.spec.ts
index 117378a6a2..d0960ff05a 100644
--- a/packages/vite/helpers/global-defines.spec.ts
+++ b/packages/vite/helpers/global-defines.spec.ts
@@ -1,6 +1,23 @@
-import { describe, expect, it } from 'vitest';
+import { afterEach, describe, expect, it } from 'vitest';
 
-import { getGlobalDefines, isHmrProgressOverlayEnabled } from './global-defines.js';
+import { getGlobalDefines, getUserDefineEntries, isHmrProgressOverlayEnabled, setUserDefineEntries } from './global-defines.js';
+
+describe('setUserDefineEntries / getUserDefineEntries', () => {
+	afterEach(() => setUserDefineEntries(undefined));
+
+	it('captures __FOO__ keys as [key, expression] pairs, JSON-encoding non-string values', () => {
+		setUserDefineEntries({ __VUE_OPTIONS_API__: true, __APP_VERSION__: '"1.2.3"', 'process.env.FOO': '"bar"', 'global.isIOS': 'true', __not_a_define: '1' });
+		expect(getUserDefineEntries()).toEqual([
+			['__VUE_OPTIONS_API__', 'true'],
+			['__APP_VERSION__', '"1.2.3"'],
+		]);
+	});
+
+	it('is empty when no config has been captured', () => {
+		setUserDefineEntries(undefined);
+		expect(getUserDefineEntries()).toEqual([]);
+	});
+});
 
 describe('isHmrProgressOverlayEnabled (NS_VITE_PROGRESS_OVERLAY)', () => {
 	it('defaults to enabled when the env var is unset', () => {
diff --git a/packages/vite/helpers/global-defines.ts b/packages/vite/helpers/global-defines.ts
index a34efdfd26..cabfb84d83 100644
--- a/packages/vite/helpers/global-defines.ts
+++ b/packages/vite/helpers/global-defines.ts
@@ -215,6 +215,11 @@ export function setUserDefineEntries(define: Record<string, unknown> | undefined
 	userProcessEnvDefineEntries = envEntries;
 }
 
+/** The captured `__FOO__` define entries as `[key, expression]` pairs (see setUserDefineEntries). */
+export function getUserDefineEntries(): ReadonlyArray<[string, string]> {
+	return userDefineEntries;
+}
+
 /** The captured `process.env.<KEY>` define values (see setUserDefineEntries). */
 export function getUserProcessEnvDefineEntries(): Record<string, string> {
 	return userProcessEnvDefineEntries;
diff --git a/packages/vite/hmr/server/deps-bundle.spec.ts b/packages/vite/hmr/server/deps-bundle.spec.ts
index 4952205de5..5b64685b97 100644
--- a/packages/vite/hmr/server/deps-bundle.spec.ts
+++ b/packages/vite/hmr/server/deps-bundle.spec.ts
@@ -3,6 +3,7 @@ import { tmpdir } from 'node:os';
 import * as path from 'node:path';
 import { afterAll, describe, expect, it } from 'vitest';
 
+import { setUserDefineEntries } from '../../helpers/global-defines.js';
 import { DEPS_BUNDLE_PATH, buildDepsBundleEntryCode, buildDepsCandidateSpecs, buildDepsShimCode, buildDepsVendorRuntimeModule, collectDepsModuleExportInfo, computeDepsBundleCacheKey, createDepsBundleService, depsRegistryKeyForFile, generateDepsBundle, isDepsPerModuleServingEnabled, resolveDepsEntriesFromRecording, resolveDepsEntriesFromVendorCollection } from './deps-bundle.js';
 
 describe('isDepsPerModuleServingEnabled', () => {
@@ -120,10 +121,41 @@ describe('collectDepsModuleExportInfo', () => {
 		expect(collectDepsModuleExportInfo(abs, 'android', new Set()).names).toEqual(['AndroidCanvas', 'own']);
 	});
 
-	it('bails to null for bare export * (name set lives in another package) WITHOUT the opaqueCjs flag', () => {
-		// ESM bails must stay per-module: their bundled namespace has real named
-		// exports the server cannot enumerate, so a default-only shim would
-		// break `import { x }` consumers. Only CJS bails get opaqueCjs.
+	it('follows a bare export * into the package it resolves to (nativescript-vue → @vue/runtime-core shape)', () => {
+		// A bundled barrel with no shim is evaluated a second time per-module.
+		write('node_modules/star-peer/package.json', JSON.stringify({ name: 'star-peer', module: 'dist/peer.mjs' }));
+		write('node_modules/star-peer/dist/peer.mjs', `export const peerA = 1;\nexport * from './peer-more.mjs';\n`);
+		write('node_modules/star-peer/dist/peer-more.mjs', `export const peerB = 2;\n`);
+		const abs = write('node_modules/star-root/index.js', `export * from 'star-peer';\nexport const own = 1;\n`);
+		const info = collectDepsModuleExportInfo(abs, 'ios');
+		expect(info.names).toEqual(['own', 'peerA', 'peerB']);
+		expect(info.hasDefault).toBe(false);
+	});
+
+	it('resolves bare export * subpaths through exports maps (exact and pattern entries) and platform suffixes', () => {
+		write('node_modules/sub-peer/package.json', JSON.stringify({ name: 'sub-peer', exports: { '.': './index.js', './exact': { import: './dist/exact.mjs' }, './lib/*': './dist/lib/*.mjs' } }));
+		write('node_modules/sub-peer/index.js', `export const root = 1;\n`);
+		write('node_modules/sub-peer/dist/exact.mjs', `export const exact = 1;\n`);
+		write('node_modules/sub-peer/dist/lib/deep.mjs', `export const deep = 1;\n`);
+		write('node_modules/plat-peer/package.json', JSON.stringify({ name: 'plat-peer', main: 'index.js' }));
+		write('node_modules/plat-peer/impl.ios.js', `export const impl = 'ios';\n`);
+		write('node_modules/plat-peer/impl.android.js', `export const androidImpl = 'android';\n`);
+		const abs = write('node_modules/sub-root/index.js', `export * from 'sub-peer/exact';\nexport * from 'sub-peer/lib/deep';\nexport * from 'plat-peer/impl';\n`);
+		expect(collectDepsModuleExportInfo(abs, 'ios').names).toEqual(['deep', 'exact', 'impl']);
+		expect(collectDepsModuleExportInfo(abs, 'android').names).toEqual(['androidImpl', 'deep', 'exact']);
+	});
+
+	it('resolves a bare export * from the nearest node_modules ancestor, like Node', () => {
+		write('node_modules/nested-peer/package.json', JSON.stringify({ name: 'nested-peer', main: 'index.js' }));
+		write('node_modules/nested-peer/index.js', `export const hoisted = 1;\n`);
+		write('node_modules/nested-root/node_modules/nested-peer/package.json', JSON.stringify({ name: 'nested-peer', main: 'index.js' }));
+		write('node_modules/nested-root/node_modules/nested-peer/index.js', `export const nested = 1;\n`);
+		const abs = write('node_modules/nested-root/index.js', `export * from 'nested-peer';\n`);
+		expect(collectDepsModuleExportInfo(abs, 'ios').names).toEqual(['nested']);
+	});
+
+	it('bails to null for a bare export * that resolves nowhere, WITHOUT the opaqueCjs flag', () => {
+		// Unresolvable ESM stars keep per-module serving; only CJS bails get opaqueCjs.
 		const abs = write('bare-star.js', `export * from 'other-pkg';\nexport const own = 1;\n`);
 		const info = collectDepsModuleExportInfo(abs, 'ios');
 		expect(info.names).toBeNull();
@@ -249,6 +281,9 @@ function createFixtureProject(): string {
 	write('node_modules/pkg-j/package.json', JSON.stringify({ name: 'pkg-j', version: '1.0.0', main: 'dist/index.js' }));
 	write('node_modules/pkg-j/index.ts', `export * from './src/not-shipped';\n`);
 	write('node_modules/pkg-j/dist/index.js', `export const J = 'j-dist';\n`);
+	// Dep code reading app-level `__FOO__` defines (Vue feature-flag shape).
+	write('node_modules/pkg-flags/package.json', JSON.stringify({ name: 'pkg-flags', version: '1.0.0', module: 'index.js' }));
+	write('node_modules/pkg-flags/index.js', `export const optionsApi = typeof __VUE_OPTIONS_API__ === 'boolean' ? __VUE_OPTIONS_API__ : 'unset';\nexport const bad = typeof __BAD_DEFINE__ === 'undefined' ? 'unset' : __BAD_DEFINE__;\n`);
 	return projectRoot;
 }
 
@@ -360,6 +395,18 @@ describe('generateDepsBundle', () => {
 		const state = await generateDepsBundle({ projectRoot, platform: 'ios', mode: 'development', flavor: 'typescript', recordedPaths });
 		expect(state!.code).toContain('platform polyfills');
 	});
+
+	it("substitutes the app's __FOO__ defines in bundled dep code, skipping values esbuild cannot define", async () => {
+		setUserDefineEntries({ __VUE_OPTIONS_API__: true, __BAD_DEFINE__: 'compute()' });
+		try {
+			const state = await generateDepsBundle({ projectRoot, platform: 'ios', mode: 'development', flavor: 'vue', recordedPaths: ['/ns/m/node_modules/pkg-flags/index.js'] });
+			expect(state).not.toBeNull();
+			expect(state!.code).not.toContain('__VUE_OPTIONS_API__');
+			expect(state!.code).toContain('__BAD_DEFINE__');
+		} finally {
+			setUserDefineEntries(undefined);
+		}
+	});
 });
 
 // ============================================================================
@@ -530,6 +577,32 @@ describe('createDepsBundleService', () => {
 		rmSync(seedRoot, { recursive: true, force: true });
 	});
 
+	it('serves shims for a bundled root whose barrel re-exports a bare dependency (nativescript-vue shape)', async () => {
+		// Per-module serving here would re-run the root's top-level init().
+		const root = mkdtempSync(path.join(realpathSync(tmpdir()), 'ns-deps-bare-star-'));
+		const write = (rel: string, contents: string) => {
+			const abs = path.join(root, rel);
+			mkdirSync(path.dirname(abs), { recursive: true });
+			writeFileSync(abs, contents);
+		};
+		write('package.json', JSON.stringify({ name: 'fixture-app', version: '1.0.0' }));
+		write('node_modules/ns-framework/package.json', JSON.stringify({ name: 'ns-framework', version: '1.0.0', main: 'dist/index.js' }));
+		write('node_modules/ns-framework/dist/index.js', `import { init } from './runtime.js';\ninit();\nexport * from 'ns-framework-core';\nexport { init };\n`);
+		write('node_modules/ns-framework/dist/runtime.js', `export function init() {}\n`);
+		write('node_modules/ns-framework-core/package.json', JSON.stringify({ name: 'ns-framework-core', version: '1.0.0', module: 'dist/core.mjs' }));
+		write('node_modules/ns-framework-core/dist/core.mjs', `export const ref = () => 1;\nexport const createApp = () => 2;\n`);
+		const service = createDepsBundleService({ projectRoot: root, platform: 'ios', mode: 'development', flavor: 'vue', getRecordedPaths: () => ['/ns/m/node_modules/ns-framework'] });
+		await service.ensureBuilt();
+		for (const spec of ['/node_modules/ns-framework', '/node_modules/ns-framework/dist/index.js']) {
+			const shim = service.getShimForSpec(spec);
+			expect(shim).toContain(`import "${DEPS_BUNDLE_PATH}";`);
+			expect(shim).toContain('export const init = ');
+			expect(shim).toContain('export const createApp = ');
+			expect(shim).toContain('export const ref = ');
+		}
+		rmSync(root, { recursive: true, force: true });
+	});
+
 	it('stops handing out new shims after disableServingForSession but keeps the payload servable', async () => {
 		const service = makeService();
 		await service.ensureBuilt();
diff --git a/packages/vite/hmr/server/deps-bundle.ts b/packages/vite/hmr/server/deps-bundle.ts
index dbc95ad622..43763cb795 100644
--- a/packages/vite/hmr/server/deps-bundle.ts
+++ b/packages/vite/hmr/server/deps-bundle.ts
@@ -58,7 +58,7 @@ import * as esbuild from 'esbuild';
 import type { ViteDevServer } from 'vite';
 
 import { resolvePlatform } from '../../helpers/cli-flags.js';
-import { getGlobalDefines } from '../../helpers/global-defines.js';
+import { getGlobalDefines, getUserDefineEntries } from '../../helpers/global-defines.js';
 import { getProjectFlavor } from '../../helpers/flavor.js';
 import { getMonorepoWorkspaceRoot } from '../../helpers/project.js';
 import { createNativeClassEsbuildPlugin } from '../../helpers/nativeclass-esbuild-plugin.js';
@@ -132,6 +132,35 @@ export function buildDepsCandidateSpecs(spec: string, platform: string): string[
 	return [...(hasExt ? [spec] : []), ...exts.map((ext) => baseNoExt + ext), ...exts.map((ext) => baseNoExt + '/index' + ext)];
 }
 
+function collectExportsMapTargets(node: unknown, out: string[]): void {
+	if (!node) return;
+	if (typeof node === 'string') {
+		out.push(node);
+		return;
+	}
+	if (typeof node === 'object' && !Array.isArray(node)) {
+		// Prefer client/ESM conditions in the order esbuild would.
+		for (const cond of ['module', 'import', 'browser', 'default', 'require']) {
+			const next = (node as Record<string, unknown>)[cond];
+			if (next !== undefined) collectExportsMapTargets(next, out);
+		}
+	}
+}
+
+function resolvePackageFileCandidates(pkgDir: string, candidates: readonly string[], platform: string): string | null {
+	const exts = platformResolveExtensions(platform);
+	for (const cand of candidates) {
+		const abs = path.resolve(pkgDir, cand);
+		if (!abs.startsWith(pkgDir + path.sep)) continue;
+		if (existsSync(abs) && statSync(abs).isFile()) return abs;
+		const base = abs.replace(SCRIPT_EXT_RE, '');
+		for (const candidate of [...exts.map((ext) => base + ext), ...exts.map((ext) => base + '/index' + ext)]) {
+			if (existsSync(candidate) && statSync(candidate).isFile()) return candidate;
+		}
+	}
+	return null;
+}
+
 /**
  * Resolve a package ROOT spec (`/node_modules/<pkg>`) to its entry file via
  * the package's own `exports['.']`/`module`/`main`, honoring platform
@@ -154,34 +183,41 @@ function resolvePackageRootEntry(spec: string, roots: readonly string[], platfor
 			continue;
 		}
 		const candidates: string[] = [];
-		const visitExports = (node: any) => {
-			if (!node) return;
-			if (typeof node === 'string') {
-				candidates.push(node);
-				return;
-			}
-			if (typeof node === 'object' && !Array.isArray(node)) {
-				// Prefer client/ESM conditions in the order esbuild would.
-				for (const cond of ['module', 'import', 'browser', 'default', 'require']) {
-					if (node[cond] !== undefined) visitExports(node[cond]);
-				}
-			}
-		};
-		visitExports(pkg.exports?.['.'] ?? (typeof pkg.exports === 'string' ? pkg.exports : undefined));
+		collectExportsMapTargets(pkg.exports?.['.'] ?? (typeof pkg.exports === 'string' ? pkg.exports : undefined), candidates);
 		if (typeof pkg.module === 'string') candidates.push(pkg.module);
 		if (typeof pkg.main === 'string') candidates.push(pkg.main);
 		candidates.push('index');
-		for (const cand of candidates) {
-			const abs = path.resolve(pkgDir, cand);
-			if (!abs.startsWith(pkgDir + path.sep)) continue;
-			if (existsSync(abs) && statSync(abs).isFile()) return abs;
-			const base = abs.replace(SCRIPT_EXT_RE, '');
-			for (const ext of platformResolveExtensions(platform)) {
-				if (existsSync(base + ext)) return base + ext;
+		const resolved = resolvePackageFileCandidates(pkgDir, candidates, platform);
+		if (resolved) return resolved;
+	}
+	return null;
+}
+
+function resolvePackageSubpathEntry(pkgDir: string, subpath: string, platform: string): string | null {
+	const candidates: string[] = [];
+	try {
+		const pkg = JSON.parse(readFileSync(path.join(pkgDir, 'package.json'), 'utf-8'));
+		const exportsMap = pkg.exports && typeof pkg.exports === 'object' && !Array.isArray(pkg.exports) ? (pkg.exports as Record<string, unknown>) : null;
+		if (exportsMap) {
+			const key = `./${subpath}`;
+			collectExportsMapTargets(exportsMap[key], candidates);
+			for (const [pattern, target] of Object.entries(exportsMap)) {
+				const star = pattern.indexOf('*');
+				if (star === -1) continue;
+				const prefix = pattern.slice(0, star);
+				const suffix = pattern.slice(star + 1);
+				if (key.length < prefix.length + suffix.length || !key.startsWith(prefix) || !key.endsWith(suffix)) continue;
+				const captured = key.slice(prefix.length, key.length - suffix.length);
+				const targets: string[] = [];
+				collectExportsMapTargets(target, targets);
+				for (const t of targets) candidates.push(t.split('*').join(captured));
 			}
 		}
+	} catch {
+		// Unreadable manifest: fall through to the on-disk lookup.
 	}
-	return null;
+	candidates.push(subpath);
+	return resolvePackageFileCandidates(pkgDir, candidates, platform);
 }
 
 /** `/node_modules/<pkg>` or `/node_modules/@scope/<pkg>` with no subpath. */
@@ -567,6 +603,19 @@ export function saveDepsBundleToDisk(projectRoot: string, platform: string, key:
 	}
 }
 
+// esbuild `define` takes JSON literals or identifier/member chains only.
+const DEFINE_IDENTIFIER_CHAIN_RE = /^[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*)*$/;
+
+function isEsbuildDefineValue(expr: string): boolean {
+	if (DEFINE_IDENTIFIER_CHAIN_RE.test(expr)) return true;
+	try {
+		JSON.parse(expr);
+		return true;
+	} catch {
+		return false;
+	}
+}
+
 export async function generateDepsBundle(options: GenerateDepsBundleOptions): Promise<DepsBundleState | null> {
 	const { projectRoot, platform, mode, flavor, verbose } = options;
 	const t0 = Date.now();
@@ -605,6 +654,10 @@ export async function generateDepsBundle(options: GenerateDepsBundleOptions): Pr
 		// substitutes free references, so CJS-wrapped code (where `module` is a
 		// bound variable) is untouched.
 		out['module.hot'] = 'undefined';
+		// App `__FOO__` defines reach dep code here exactly as in bundle.mjs.
+		for (const [key, expr] of getUserDefineEntries()) {
+			if (out[key] === undefined && isEsbuildDefineValue(expr)) out[key] = expr;
+		}
 		return out;
 	})();
 
@@ -770,6 +823,23 @@ function resolveLocalReExportTarget(spec: string, importerPath: string, platform
 	return null;
 }
 
+// Node-style resolution from the importer: nearest node_modules ancestor wins.
+function resolveBareReExportTarget(spec: string, importerPath: string, platform: string): string | null {
+	const match = /^((?:@[^/]+\/)?[^/]+)(?:\/(.+))?$/.exec(spec);
+	if (!match) return null;
+	const [, pkgName, subpath] = match;
+	let dir = path.dirname(importerPath);
+	for (;;) {
+		const pkgDir = path.join(dir, 'node_modules', pkgName);
+		if (existsSync(path.join(pkgDir, 'package.json'))) {
+			return subpath ? resolvePackageSubpathEntry(pkgDir, subpath, platform) : resolvePackageRootEntry(`/node_modules/${pkgName}`, [dir], platform);
+		}
+		const parent = path.dirname(dir);
+		if (parent === dir) return null;
+		dir = parent;
+	}
+}
+
 // Static CJS export-name discovery: `exports.NAME = ...` and
 // `Object.defineProperty(exports, "NAME", ...)` assignments (transpiled-to-CJS
 // packages like downsample). UMD factories (`module.exports = fn()`) expose no
@@ -792,16 +862,18 @@ function collectCjsExportInfo(code: string): DepsModuleExportInfo {
 
 /**
  * Static export-name discovery for a node_modules file. ESM: direct exports
- * plus recursion through RELATIVE `export * from` chains (the shape deep
- * package barrels like rxjs's index take). CJS: `exports.NAME` assignment
- * scanning (esbuild's interop exposes those names on the bundled namespace at
- * runtime). Returns `names: null` for files whose export surface is not
- * statically enumerable — with two DIFFERENT consequences downstream:
- * CJS/UMD files additionally carry `opaqueCjs: true` and still get a
- * default-only shim (their bundled namespace has nothing but `default`);
- * ESM files with a bare `export * from 'pkg'` or an unresolvable relative
- * `export *` target keep per-module serving, where the transform pipeline
- * resolves the star through the import map.
+ * plus recursion through `export * from` chains — relative targets (the
+ * shape deep package barrels like rxjs's index take) and bare package targets
+ * resolved from the importer like Node would (nativescript-vue re-exporting
+ * `@vue/runtime-core`). CJS: `exports.NAME` assignment scanning (esbuild's
+ * interop exposes those names on the bundled namespace at runtime). Returns
+ * `names: null` for files whose export surface is not statically enumerable —
+ * with two DIFFERENT consequences downstream: CJS/UMD files additionally carry
+ * `opaqueCjs: true` and still get a default-only shim (their bundled
+ * namespace has nothing but `default`); ESM files with an `export *` target
+ * that resolves nowhere on disk keep per-module serving, where the transform
+ * pipeline resolves the star through the import map. A BUNDLED file served
+ * per-module evaluates a second time, so any resolvable star must be followed.
  */
 export function collectDepsModuleExportInfo(absPath: string, platform: string, seen: Set<string> = new Set()): DepsModuleExportInfo {
 	if (seen.has(absPath)) return { names: [], hasDefault: false };
@@ -828,8 +900,7 @@ export function collectDepsModuleExportInfo(absPath: string, platform: string, s
 	const starRe = /^[ \t]*export\s+\*\s+from\s+["']([^"']+)["']/gm;
 	while ((match = starRe.exec(code)) !== null) {
 		const spec = match[1];
-		if (!spec.startsWith('.')) return { names: null, hasDefault: false };
-		const target = resolveLocalReExportTarget(spec, absPath, platform);
+		const target = spec.startsWith('.') ? resolveLocalReExportTarget(spec, absPath, platform) : resolveBareReExportTarget(spec, absPath, platform);
 		if (!target) return { names: null, hasDefault: false };
 		const child = collectDepsModuleExportInfo(target, platform, seen);
 		if (child.names === null) return { names: null, hasDefault: false };