diff --git a/packages/client/modules/src/index.ts b/packages/client/modules/src/index.ts
index 9734685e70..cb5c070067 100644
--- a/packages/client/modules/src/index.ts
+++ b/packages/client/modules/src/index.ts
@@ -1090,7 +1090,9 @@ export class ClientModuleRegistry extends Service {
       const requested = requestUrl.pathname.slice(prefix.length)
       const sourceMap = requested.endsWith('.map')
       const fileName = sourceMap ? requested.slice(0, -'.map'.length) : requested
-      if (!CLIENT_CHUNK.test(fileName)) return undefined
+      // The Node Client entry and its split chunks share this directory but
+      // must never be served as browser factory scripts.
+      if (!CLIENT_CHUNK.test(fileName) || fileName === 'client.node.js' || fileName.startsWith('client.node.')) return undefined
       if (resourceUrl !== chunkUrl(record.entry.id, fileName, record.entry.rev, sourceMap)) return undefined
       return { record, fileName, sourceMap, resourceUrl }
     }
diff --git a/packages/client/modules/tests/node-half.client.spec.ts b/packages/client/modules/tests/node-half.client.spec.ts
index ff7daaca09..56a1c8ba00 100644
--- a/packages/client/modules/tests/node-half.client.spec.ts
+++ b/packages/client/modules/tests/node-half.client.spec.ts
@@ -915,6 +915,36 @@ describe('client bundle activation', () => {
     expect((await routeRequest(route, url.replace(`rev=${row.rev}`, 'rev=stale'))).status).toBe(404)
   })
 
+  it('loads a renamed browser export at the logical URL without exposing Node bundles as chunks', async () => {
+    const packageName = '@fixture/dual-client'
+    const legacyPath = writePackage(packageName, {
+      dsh: { client: { platform: 'web' } },
+      exports: {
+        './client': {
+          types: './lib/types/client/index.d.ts',
+          node: './lib/client.node.js',
+          browser: './lib/client.browser.js',
+          default: './lib/client.browser.js',
+        },
+        './package.json': './package.json',
+      },
+    })
+    mkdirSync(dirname(legacyPath), { recursive: true })
+    writeFileSync(join(dirname(legacyPath), 'client.browser.js'), 'module.exports = { browser: true }\n')
+    for (const name of ['client.node.js', 'client.node.helper.js']) {
+      writeFileSync(join(dirname(legacyPath), name), 'throw new Error("Node code must not reach a browser")\n')
+    }
+    const { service, route } = constructWithRoute([packageName])
+    const row = service.graph().entries[0]!
+    expect(row.url).toContain(`${packageName}/client.js`)
+    expect((await routeRequest(route, row.url)).body.toString('utf8')).toContain('browser: true')
+    for (const name of ['client.node.js', 'client.node.helper.js']) {
+      for (const suffix of ['', '.map']) {
+        expect((await routeRequest(route, chunkReference(packageName, name + suffix, row.rev))).status).toBe(404)
+      }
+    }
+  })
+
   it('publishes a new chunk revision when a completed build rewrites only the entry timestamp', async () => {
     const packageName = '@fixture/chunk-only-rebuild'
     const clientPath = writePackage(packageName)
diff --git a/packages/client/tsdown.client.ts b/packages/client/tsdown.client.ts
index 888519a890..574696c9fb 100644
--- a/packages/client/tsdown.client.ts
+++ b/packages/client/tsdown.client.ts
@@ -104,7 +104,7 @@ function browserSourcePath(source: string, sourcemapPath: string): string {
  * `import.meta.dirname`. Its `package.json` name is the plugin id stamped into
  * the __ModuleLoader__.load handoff and onto the injected style tags.
  * @param libEntry - node-half entries.
- * @param options - phase placement, lib overrides, companion Node configs, and optional per-file Client banner.
+ * @param options - phase placement, lib overrides, optional independently bundled Node Client, companion configs, and per-file Client banner.
  * @returns ENV-selected tsdown config for the current build face.
  * @throws {Error} when `<packageDir>/package.json` is unreadable or declares no name.
  */
@@ -118,13 +118,16 @@ export function clientBundle(
   return ({ env }) => {
     const face = buildFace(env?.DSH_BUILD_FACE)
     const clientEntry = face === undefined ? 'src/client/index.ts' : 'lib/types/client/index.js'
-    const client = clientConfig(manifest, clientEntry, options.clientBanner)
+    const client = clientConfig(manifest, clientEntry, options.clientBanner, options.dualClient === true)
     const node = [lib, ...(options.companions ?? [])]
+    const clientFaces = options.dualClient === true
+      ? [nodeClientConfig(manifest, clientEntry), client]
+      : [client]
     if (face === 'host') return options.hostPhase === true ? node : [SKIP_WORKSPACE_BUILD]
     if (face === 'client') {
-      return options.hostPhase === true ? [client] : [...node, client]
+      return options.hostPhase === true ? clientFaces : [...node, ...clientFaces]
     }
-    return [...node, client]
+    return [...node, ...clientFaces]
   }
 }
 
@@ -208,6 +211,8 @@ export function clientOnly(configs: readonly UserConfig[]): BuildFaceConfig {
 interface ClientBundleOptions {
   /** Emit the Node-side artifacts during the Host pass instead of the Client pass. */
   readonly hostPhase?: boolean
+  /** Emit independent ESM `client.node.js` and browser-factory `client.browser.js` from the same Client entry. */
+  readonly dualClient?: boolean
   /** Additional Node-side configs emitted alongside the package library. */
   readonly companions?: readonly UserConfig[]
   /** Overrides for the package's primary Node-side library config. */
@@ -467,7 +472,30 @@ function asyncChunkRequirePlugin(): TsdownPlugin {
   }
 }
 
-function clientConfig(manifest: PackageManifest, entry: string, clientBanner?: (fileName: string) => string | undefined): UserConfig {
+/** Bundle the Client entry for plain Node independently of the Host entry and browser factory. */
+function nodeClientConfig(manifest: PackageManifest, entry: string): UserConfig {
+  const isolation = clientInputIsolation(manifest.name)
+  return clientLibraryConfig(manifest, [entry], {
+    name: `${manifest.name}/client-node`,
+    entry: { 'client.node': entry },
+    sourcemap: true,
+    inputOptions: { resolve: { conditionNames: ['node', 'import', 'module', 'default'] } },
+    plugins: [tscSourceMapPlugin(), isolation.plugin],
+    outputOptions: {
+      entryFileNames: 'client.node.js',
+      chunkFileNames: 'client.node.[name].js',
+      sourcemapExcludeSources: false,
+      sourcemapPathTransform: isolation.sourcePath,
+    },
+  })
+}
+
+function clientConfig(
+  manifest: PackageManifest,
+  entry: string,
+  clientBanner?: (fileName: string) => string | undefined,
+  dualClient = false,
+): UserConfig {
   const id = manifest.name
   let requested: ReadonlySet<string> | undefined
   const isRequested = (specifier: string): boolean => (requested ??= clientExternals(manifest)).has(specifier)
@@ -475,9 +503,8 @@ function clientConfig(manifest: PackageManifest, entry: string, clientBanner?: (
   return {
     name: `${id}/client`,
     entry: { client: entry },
-    // Browser bundle lands next to the node half (single lib/ artifact dir;
-    // the entryFileNames pin keeps it exactly lib/client.js). clean must stay
-    // off — a default clean would wipe the node-half output emitted above.
+    // Browser bundle lands beside the Node artifacts. clean must stay off:
+    // cleaning this invocation would wipe the independently emitted Node entry.
     outDir: 'lib',
     format: 'cjs',
     platform: 'browser',
@@ -601,10 +628,10 @@ function clientConfig(manifest: PackageManifest, entry: string, clientBanner?: (
       },
     }],
     outputOptions: {
-      entryFileNames: 'client.js',
+      entryFileNames: dualClient ? 'client.browser.js' : 'client.js',
       // The imported source basename becomes the published chunk name; package
       // files lists and artifact tests pin every intentional chunk.
-      chunkFileNames: 'client.[name].js',
+      chunkFileNames: dualClient ? 'client.browser.[name].js' : 'client.[name].js',
       sourcemapExcludeSources: false,
       // The map is served from /plugins/<scoped-package>/client.js.map. The
       // browser resolves its local sources back into URLs that mirror the
diff --git a/packages/typert/registry/README.i18n.yaml b/packages/typert/registry/README.i18n.yaml
index 51b80ad117..0f49341a19 100644
--- a/packages/typert/registry/README.i18n.yaml
+++ b/packages/typert/registry/README.i18n.yaml
@@ -15,8 +15,8 @@
   en: d152484eb41ac6b4
   zh: 09388d293f9be9cb
 /deepseek-ai-dsh-typert-registry/use-this-package:
-  en: d885ccd8f13315f1
-  zh: cea7c258f5f57e2d
+  en: eeeaecf7800bcb6b
+  zh: 2562380c15cb2428
 /deepseek-ai-dsh-typert-registry/use-this-package/minimal-setup:
   en: 1ec4b304a024bb3c
   zh: f17e796c26faabab
@@ -24,8 +24,8 @@
   en: 254d265a3e5b1638
   zh: bfa325ec79afbc72
 /deepseek-ai-dsh-typert-registry/use-this-package/registering-a-contribution:
-  en: 2b2f750a1b145d85
-  zh: d15c55c01af1755a
+  en: 9ca425515904d5c9
+  zh: b251226ecfa32002
 /deepseek-ai-dsh-typert-registry/use-this-package/lookup-and-context-providers:
   en: 937dfd14d9e18a5c
   zh: 6cf6aa352c8825c6
diff --git a/packages/typert/registry/README.md b/packages/typert/registry/README.md
index 19d3f32ecf..fc6aebaa52 100644
--- a/packages/typert/registry/README.md
+++ b/packages/typert/registry/README.md
@@ -25,7 +25,7 @@ English | [中文](README.zh.md)
 <a id="use-this-package"></a>
 ## Use this package
 
-Mount the registry in any Host or Client composition that stores or consumes generated Typert artifacts; it provides `ctx.typert`. There is no configuration.
+Mount the registry in any Host or Client composition that stores or consumes generated Typert artifacts; it provides `ctx.typert`. There is no configuration. Node resolves `/client` to the standalone ESM `lib/client.node.js` bundle for programmatic Cordis composition; browsers use the `lib/client.browser.js` loader factory through the logical `/plugins/.../client.js` URL. Both bundles use the same registry implementation, separate from the Host package root.
 
 ### Minimal setup
 
@@ -45,6 +45,8 @@ Invocation information is available through existing `ctx.typert.local.get/list`
 
 Generated artifacts register through the [loader](../loader/README.md) in Loader compositions; any other owner calls `ctx.typert.register(contribution)` directly and receives the exact disposer that withdraws it. Duplicate package-face identities, schema keys, invocation ids, or endpoints reject the whole batch before anything is committed.
 
+Harness offline integrations register an ordinary `TYPERT_REMOTE` contribution with `ctx.typert.remotes.register(contribution)` in their profile Context. `$mount(contribution)` already performs that registration, so registering and mounting the same contribution in the same registry duplicates it and fails. Keep offline metadata ownership separate from the live connection-and-mount Context. Independent offline consumers may instead read `TYPERT_REMOTE.methods` without any Registry. Registry state belongs to its Context and process, is not shared across processes, and neither registration nor querying opens a connection.
+
 ### Lookup and Context providers
 
 Remote calls resolve Host objects and scoped Contexts through `ctx.typert.lookups` and `ctx.typert.contexts`. `registerHost()` installs the Host wire declaration and its wire-to-Context resolver, while `configureHost()` replaces only that resolver. `registerClient()` installs the bidirectional Client adapter for the same merge-declared kind. Host-to-Client event sources carry their domain identity explicitly instead of projecting it back from a Context.
diff --git a/packages/typert/registry/README.zh.md b/packages/typert/registry/README.zh.md
index 2c34b5df8a..c558d14460 100644
--- a/packages/typert/registry/README.zh.md
+++ b/packages/typert/registry/README.zh.md
@@ -25,7 +25,7 @@ kind: "package-reference"
 <a id="use-this-package"></a>
 ## 使用本包
 
-在存储或消费生成 Typert 产物的任何 Host 或 Client 组合中挂载本注册表；它提供 `ctx.typert`。没有配置。
+在存储或消费生成 Typert 产物的任何 Host 或 Client 组合中挂载本注册表；它提供 `ctx.typert`。没有配置。Node 将 `/client` 解析为供程序化 Cordis 组合使用的独立 ESM bundle `lib/client.node.js`；浏览器通过逻辑 URL `/plugins/.../client.js` 使用 `lib/client.browser.js` loader factory。两个 bundle 使用相同的注册表实现，且与 Host 包根入口分离。
 
 ### 最小设置
 
@@ -45,6 +45,8 @@ kind: "package-reference"
 
 生成产物在 Loader 组合中通过 [loader](../loader/README.zh.md) 注册；其他所有者直接调用 `ctx.typert.register(contribution)`，并获得撤销它的同一资源释放函数。重复的包与 face 组合键、schema 键、调用 id 或端点会在提交任何内容之前拒绝整个批次。
 
+Harness 离线集成在各自的 profile Context 中通过 `ctx.typert.remotes.register(contribution)` 注册普通 `TYPERT_REMOTE` 贡献。`$mount(contribution)` 已执行该注册，因此在同一个注册表中先注册再挂载同一贡献会因重复而失败。离线元数据所有权应与建立实际连接及挂载的 Context 分离。独立离线消费方也可以直接读取 `TYPERT_REMOTE.methods`，无需任何 Registry。注册表状态归所属 Context 与进程所有，不跨进程共享；注册和查询都不会打开连接。
+
 ### Lookup 与 Context 提供方
 
 Remote 调用通过 `ctx.typert.lookups` 与 `ctx.typert.contexts` 解析 Host 对象与作用域 Context。`registerHost()` 安装 Host wire 声明及其 wire 到 Context 的 resolver，`configureHost()` 只替换该 resolver。`registerClient()` 为同一个 merge-declared kind 安装双向 Client adapter。Host 到 Client 的事件源显式携带领域 identity，而不从 Context 反向投影。
diff --git a/packages/typert/registry/package.json b/packages/typert/registry/package.json
index a5f4e98079..de224aadef 100644
--- a/packages/typert/registry/package.json
+++ b/packages/typert/registry/package.json
@@ -20,7 +20,9 @@
     },
     "./client": {
       "types": "./lib/types/client/index.d.ts",
-      "default": "./lib/client.js"
+      "node": "./lib/client.node.js",
+      "browser": "./lib/client.browser.js",
+      "default": "./lib/client.browser.js"
     },
     "./types": {
       "types": "./lib/types/types.d.ts",
@@ -44,7 +46,8 @@
   "files": [
     "locale/*.json",
     "lib/index.js",
-    "lib/client.js",
+    "lib/client.browser.js",
+    "lib/client.node.js",
     "lib/types/**/*.js",
     "lib/types/**/*.d.ts"
   ],
diff --git a/packages/typert/registry/tsdown.config.ts b/packages/typert/registry/tsdown.config.ts
index 71d5bd77f8..c39ddc7e93 100644
--- a/packages/typert/registry/tsdown.config.ts
+++ b/packages/typert/registry/tsdown.config.ts
@@ -1,3 +1,3 @@
 import { clientBundle } from '../../client/tsdown.client.ts'
 
-export default clientBundle(import.meta.dirname, ['lib/types/index.js'])
+export default clientBundle(import.meta.dirname, ['lib/types/index.js'], { dualClient: true })
diff --git a/scripts/check-workspace-constraints.spec.ts b/scripts/check-workspace-constraints.spec.ts
index 434efaca09..a6ec80f95d 100644
--- a/scripts/check-workspace-constraints.spec.ts
+++ b/scripts/check-workspace-constraints.spec.ts
@@ -442,6 +442,17 @@ it('requires the Inspector Worker, Client chunks, and mirrored DevTools resource
   }
 })
 
+it('requires both physical Client entries only for opted-in packages', () => {
+  const dir = 'packages/typert/registry'
+  const manifest = JSON.parse(readFileSync(new URL(`../${dir}/package.json`, import.meta.url), 'utf8')) as WorkspaceManifest['manifest']
+  expect(checkWorkspaceManifest({ dir, manifest })).toEqual([])
+  for (const omitted of ['lib/client.node.js', 'lib/client.browser.js']) {
+    const files = manifest.files!.filter(file => file !== omitted)
+    expect(checkWorkspaceManifest({ dir, manifest: { ...manifest, files } }))
+      .toEqual([expect.stringContaining('package.json files must be')])
+  }
+})
+
 it('requires the standalone shortcut protocol and rejects unrelated runtime files', () => {
   const dir = 'packages/client/shortcuts'
   const manifest = JSON.parse(readFileSync(new URL(`../${dir}/package.json`, import.meta.url), 'utf8')) as WorkspaceManifest['manifest']
diff --git a/scripts/check-workspace-constraints.ts b/scripts/check-workspace-constraints.ts
index e4a038cf1b..26cb8ae8ce 100644
--- a/scripts/check-workspace-constraints.ts
+++ b/scripts/check-workspace-constraints.ts
@@ -249,6 +249,7 @@ export function expectedDshPackageFiles(manifest: PackageManifest): readonly str
     const target = exportDefault(manifest, resource)
     if (target?.startsWith('./') && target.endsWith('.json')) localeFiles.add(target.slice(2))
   }
+  const browserClient = exportDefault(manifest, './client')
   const bundle = manifest.dsh?.bundle
   const bundleFiles = bundle === undefined ? [] : bundlePatchFiles(bundle).map(file => file.replace(/^\.\//, ''))
   const extras = [
@@ -272,11 +273,11 @@ export function expectedDshPackageFiles(manifest: PackageManifest): readonly str
     // Keyed on the artifact path, like ./client below.
     ...exportDefault(manifest, './worker') === './lib/worker.cjs' ? ['lib/worker.cjs'] : [],
     ...exportDefault(manifest, './worker') === './lib/worker.js' ? ['lib/worker.js'] : [],
-    // UI plugin packages ship their browser bundle beside the node lib
-    // (single-artifact ruling: dist/ retired, ./client resolves lib/client.js).
-    // Keyed on the artifact path, not the subpath name: a package's ./client is
-    // a browser-safe source channel, not a bundle.
-    ...exportDefault(manifest, './client') === './lib/client.js' ? ['lib/client.js'] : [],
+    // Only physical browser bundles need a publication entry; a ./client
+    // subpath may instead expose a browser-safe emitted source tree.
+    ...browserClient === './lib/client.js' ? ['lib/client.js'] : [],
+    ...browserClient === './lib/client.browser.js' ? ['lib/client.browser.js'] : [],
+    ...exportCondition(manifest, './client', 'node') === './lib/client.node.js' ? ['lib/client.node.js'] : [],
     // runtime's shell-held loader subpath ships as its own bundle beside the client half.
     ...exportDefault(manifest, './loader') === './lib/loader.js' ? ['lib/loader.js'] : [],
     // A store subpath ships its own bundle (single-entry builds; no shared chunk).
@@ -331,6 +332,12 @@ function exportDefault(manifest: PackageManifest, subpath: string): string | und
   return typeof target === 'string' ? target : undefined
 }
 
+/** Exact named condition target of an export entry. */
+function exportCondition(manifest: PackageManifest, subpath: string, condition: string): string | undefined {
+  const target = exportFields(manifest.exports?.[subpath])?.[condition]
+  return typeof target === 'string' ? target : undefined
+}
+
 /** Whether any export's runtime default points into the tsc-emitted lib/types tree. */
 function usesEmittedTreeDefaults(manifest: PackageManifest): boolean {
   return Object.keys(manifest.exports ?? {}).some(subpath =>
diff --git a/scripts/client-build-environment.client.spec.ts b/scripts/client-build-environment.client.spec.ts
index 4d5e62c8e1..3a3f54a6b0 100644
--- a/scripts/client-build-environment.client.spec.ts
+++ b/scripts/client-build-environment.client.spec.ts
@@ -278,6 +278,13 @@ describe('client build environment', () => {
     const chunked = buildFixture(officialEnvironment)
     write(join(chunked, 'packages/client/example/lib/client.pdf.js'), 'module.exports = {}\n')
     expect(() => { readClientBuildRecord(chunked) }).toThrow(/artifacts differ/)
+
+    const dual = buildFixture(officialEnvironment)
+    write(join(dual, 'packages/client/example/lib/client.node.js'), 'export const node = true\n')
+    write(join(dual, 'packages/client/example/lib/client.node.helper.js'), 'export const helper = true\n')
+    expect(() => { readClientBuildRecord(dual) }).not.toThrow()
+    write(join(dual, 'packages/client/example/lib/client.browser.js'), 'module.exports = { browser: true }\n')
+    expect(() => { readClientBuildRecord(dual) }).toThrow(/artifacts differ/)
   })
 
   it('keeps public client values out of workflow-wide environments', () => {
diff --git a/scripts/client-build-environment.ts b/scripts/client-build-environment.ts
index 57f12ef13b..2cf28aa8d4 100644
--- a/scripts/client-build-environment.ts
+++ b/scripts/client-build-environment.ts
@@ -331,7 +331,7 @@ export function readClientBuildRecord(
 function clientArtifactDigest(root: string): ClientArtifactDigest {
   const paths = globSync([...CLIENT_ARTIFACT_PATTERNS], { cwd: root })
     .map(path => path.replaceAll('\\', '/'))
-    .filter(path => statSync(resolve(root, path)).isFile())
+    .filter(path => !/\/lib\/client\.node(?:\.|$)/.test(path) && statSync(resolve(root, path)).isFile())
     .sort()
   if (paths.length === 0) throw new Error('complete client build produced no Vite or dynamic client artifacts')
 
diff --git a/scripts/client-bundle-purity.spec.ts b/scripts/client-bundle-purity.spec.ts
index 4ffd130b0a..409047ff5f 100644
--- a/scripts/client-bundle-purity.spec.ts
+++ b/scripts/client-bundle-purity.spec.ts
@@ -75,6 +75,29 @@ describe('client bundle build faces', () => {
     expect(() => staticLinked(root, ['lib/types/index.js'])).toThrow(/declares no string package name/)
   })
 
+  it('opts shared Clients into independent Node ESM and browser factory entries', () => {
+    for (const dir of ['client/connection', 'api/gateway', 'typert/registry']) {
+      const configs = clientBundle(packageDir(dir), ['lib/types/index.js'], { dualClient: true })(
+        { env: { DSH_BUILD_FACE: 'client' } },
+      )
+      const node = configs.find(config => config.name?.endsWith('/client-node'))
+      const browser = configs.find(config => config.name?.endsWith('/client'))
+      expect(node?.entry).toEqual({ 'client.node': 'lib/types/client/index.js' })
+      expect(node).toMatchObject({ platform: 'node', format: ['esm'], sourcemap: true })
+      expect(node?.inputOptions).toMatchObject({ resolve: { conditionNames: ['node', 'import', 'module', 'default'] } })
+      expect(node?.outputOptions).toMatchObject({ entryFileNames: 'client.node.js' })
+      expect(browser?.platform).toBe('browser')
+      expect(browser?.outputOptions).toMatchObject({ entryFileNames: 'client.browser.js' })
+      expect(configs.find(config => config.platform === 'node' && config.name?.endsWith('/client'))).toBeUndefined()
+    }
+    const ordinary = clientBundle(REQUESTING_PACKAGE_DIR, ['lib/types/index.js'])(
+      { env: { DSH_BUILD_FACE: 'client' } },
+    )
+    expect(ordinary.some(config => config.name?.endsWith('/client-node'))).toBe(false)
+    expect(ordinary.find(config => config.platform === 'browser')?.outputOptions)
+      .toMatchObject({ entryFileNames: 'client.js' })
+  })
+
   it('watches source in development and consumes emitted JavaScript in the Client build', () => {
     const bundle = clientBundle(REQUESTING_PACKAGE_DIR, ['lib/types/index.js'])
     const development = bundle({ env: {} }).find(config => config.platform === 'browser')
@@ -87,6 +110,34 @@ describe('client bundle build faces', () => {
 })
 
 describe('client bundle dynamic imports', () => {
+  it('keeps a dual Client browser chunk disjoint from its Node output', async () => {
+    const root = mkdtempSync(join(tmpdir(), 'dsh-dual-client-chunk-'))
+    onTestFinished(() => { rmSync(root, { recursive: true, force: true }) })
+    const entry = join(root, 'lib/types/client/index.js')
+    mkdirSync(dirname(entry), { recursive: true })
+    writeFileSync(join(root, 'package.json'), JSON.stringify({ name: REQUESTING_PACKAGE, type: 'module' }))
+    writeFileSync(entry, 'export const load = () => import("./terminal.js")\n')
+    writeFileSync(join(dirname(entry), 'terminal.js'), 'export const marker = "terminal"\n')
+    const configs = clientBundle(root, ['lib/types/index.js'], { dualClient: true })(
+      { env: { DSH_BUILD_FACE: 'client' } },
+    )
+    for (const platform of ['node', 'browser'] as const) {
+      const config = configs.find(config => config.name?.endsWith(platform === 'node' ? '/client-node' : '/client'))
+      if (config === undefined) throw new Error(`${platform} config missing`)
+      const builds = await build({
+        ...config, cwd: root, config: false, tsconfig: false,
+        write: false, clean: false, exports: false, report: false, logLevel: 'silent',
+      })
+      try {
+        const names = builds.flatMap(bundle => bundle.chunks).map(chunk => chunk.fileName)
+        expect(names).toContain(platform === 'node' ? 'client.node.js' : 'client.browser.js')
+        expect(names).toContain(platform === 'node' ? 'client.node.terminal.js' : 'client.browser.terminal.js')
+      } finally {
+        for (const bundle of builds) await bundle[Symbol.asyncDispose]()
+      }
+    }
+  })
+
   it('compiles import() to the module loader asynchronous operation', async () => {
     const root = mkdtempSync(join(tmpdir(), 'dsh-client-dynamic-import-'))
     onTestFinished(() => { rmSync(root, { recursive: true, force: true }) })
diff --git a/scripts/publint-all.spec.ts b/scripts/publint-all.spec.ts
index 6eee225f3b..aea7be74bb 100644
--- a/scripts/publint-all.spec.ts
+++ b/scripts/publint-all.spec.ts
@@ -5,6 +5,8 @@ import { fileURLToPath } from 'node:url'
 import { once } from 'node:events'
 import { execa } from 'execa'
 import { afterEach, describe, expect, it } from 'vitest'
+import type { Message } from 'publint'
+import { isBrowserBundleFormatFalsePositive } from './publint-browser-format.ts'
 
 const repositoryRoot = fileURLToPath(new URL('..', import.meta.url))
 const runner = fileURLToPath(new URL('./publint-all.ts', import.meta.url))
@@ -91,6 +93,20 @@ async function run(root: string, signal: AbortSignal) {
   return completed
 }
 
+describe('publint browser format filtering', () => {
+  it('exempts browser factories but not the sibling Node ESM artifact', () => {
+    const format = (file: string): Message => ({
+      code: 'FILE_INVALID_FORMAT',
+      args: { actualFilePath: `package/lib/${file}` },
+      path: ['./client'],
+    }) as Message
+    expect(isBrowserBundleFormatFalsePositive(format('client.browser.js'))).toBe(true)
+    expect(isBrowserBundleFormatFalsePositive(format('client.js'))).toBe(true)
+    expect(isBrowserBundleFormatFalsePositive(format('client.node.js'))).toBe(false)
+    expect(isBrowserBundleFormatFalsePositive(format('client.node.helper.js'))).toBe(false)
+  })
+})
+
 describe('publint package runner', () => {
   it('reports deadline cancellation after every owned child closes', async ({ signal }) => {
     const deadline = new AbortController()
diff --git a/scripts/publint-all.ts b/scripts/publint-all.ts
index 17a7380fb8..8b52f1f8c1 100644
--- a/scripts/publint-all.ts
+++ b/scripts/publint-all.ts
@@ -12,6 +12,7 @@ import { publint, type Message, type PackFile } from 'publint'
 import { formatMessage } from 'publint/utils'
 import ts from 'typescript'
 import { defaultParallelism } from './parallelism.ts'
+import { isBrowserBundleFormatFalsePositive } from './publint-browser-format.ts'
 
 const CONCURRENCY_ENV = 'DSH_PUBLINT_CONCURRENCY'
 const repositoryRoot = resolve(import.meta.dirname, '..')
@@ -177,22 +178,6 @@ function relativeImports(file: string, sourceText: string): RelativeImport[] {
   return imports
 }
 
-/**
- * publint reads the CommonJS interop preamble inside the prebuilt browser
- * bundles and reports CJS-written-as-ESM. Node never resolves those files:
- * `lib/client.js` is evaluated by the page module system as a classic script,
- * and `lib/worker.js` by `new Worker(url, { type: 'module' })` — both outside
- * the Node resolution publint models. Exactly that verdict on exactly those
- * files is suppressed; every other publint error stays fatal.
- */
-function isBrowserBundleFormatFalsePositive(message: Message): boolean {
-  if (message.code !== 'FILE_INVALID_FORMAT') return false
-  const filePath = (message.args as { actualFilePath?: string }).actualFilePath ?? ''
-  const exportKey = Array.isArray(message.path) ? message.path.join('/') : ''
-  return /(^|\/)lib\/(client|worker)\.js$/.test(filePath)
-    || /(^|\/)\.\/(client|worker)$/.test(exportKey)
-}
-
 async function runPublint(target: PackageTarget): Promise<PublintResult> {
   try {
     const files = publicationFiles(target)
diff --git a/scripts/publint-browser-format.ts b/scripts/publint-browser-format.ts
new file mode 100644
index 0000000000..0a785b8aaa
--- /dev/null
+++ b/scripts/publint-browser-format.ts
@@ -0,0 +1,16 @@
+import type { Message } from 'publint'
+
+/**
+ * Browser Client and Worker artifacts run outside Node's ESM loader, so their
+ * CommonJS-format verdict is false; a Node Client entry must never be exempt.
+ * Other publint diagnostics remain fatal.
+ * @param message - one publint diagnostic for a published file.
+ * @returns true only for the known browser script format verdict.
+ */
+export function isBrowserBundleFormatFalsePositive(message: Message): boolean {
+  if (message.code !== 'FILE_INVALID_FORMAT') return false
+  const filePath = (message.args as { actualFilePath?: string }).actualFilePath ?? ''
+  const exportKey = Array.isArray(message.path) ? message.path.join('/') : ''
+  return /(^|\/)lib\/(?:client(?:\.browser)?|worker)\.js$/.test(filePath)
+    || filePath === '' && /(^|\/)\.\/worker$/.test(exportKey)
+}
diff --git a/tsconfig.node.base.json b/tsconfig.node.base.json
new file mode 100644
index 0000000000..08b58789e7
--- /dev/null
+++ b/tsconfig.node.base.json
@@ -0,0 +1,7 @@
+{
+  "extends": "./tsconfig.base.json",
+  "compilerOptions": {
+    "lib": ["ES2024", "ESNext.Disposable"],
+    "types": ["node"]
+  }
+}