diff --git a/config/electron-builder.config.cjs b/config/electron-builder.config.cjs
index 4b1e1c36653..11e8df74bb9 100644
--- a/config/electron-builder.config.cjs
+++ b/config/electron-builder.config.cjs
@@ -264,6 +264,8 @@ module.exports = {
     '!out/runtimes{,/**/*}',
     '!out/node-runtime-cache{,/**/*}',
     '!config{,/**/*}',
+    // Cloud services deploy separately; their sources are not desktop runtime resources.
+    '!cloud{,/**/*}',
     // Release archives and other build staging are not runtime resources.
     '!.build{,/**/*}',
     // Worktree-local Vite dependency caches are development inputs.
diff --git a/config/scripts/electron-builder-config.test.mjs b/config/scripts/electron-builder-config.test.mjs
index 37ae87b21ed..d7a6e0235a3 100644
--- a/config/scripts/electron-builder-config.test.mjs
+++ b/config/scripts/electron-builder-config.test.mjs
@@ -26,6 +26,7 @@ describe('electron-builder config', () => {
       expect.arrayContaining([
         '!src{,/**/*}',
         '!config{,/**/*}',
+        '!cloud{,/**/*}',
         '!docs{,/**/*}',
         '!mobile{,/**/*}',
         '!native{,/**/*}',
diff --git a/config/scripts/packaged-cloud-source-exclusion.test.mjs b/config/scripts/packaged-cloud-source-exclusion.test.mjs
new file mode 100644
index 00000000000..53e3fe8dd09
--- /dev/null
+++ b/config/scripts/packaged-cloud-source-exclusion.test.mjs
@@ -0,0 +1,53 @@
+import { existsSync } from 'node:fs'
+import { mkdir, mkdtemp, readFile, rm, writeFile } from 'node:fs/promises'
+import { createRequire } from 'node:module'
+import { tmpdir } from 'node:os'
+import { dirname, join } from 'node:path'
+import { describe, expect, it } from 'vitest'
+
+const require = createRequire(import.meta.url)
+const electronBuilderConfig = require('../electron-builder.config.cjs')
+const { copyFiles, FileMatcher } = require('app-builder-lib/out/fileMatcher')
+
+describe('packaged cloud source exclusion', () => {
+  it('omits cloud service sources during traversal while preserving compiled cloud clients', async () => {
+    const root = await mkdtemp(join(tmpdir(), 'orca-packaging-cloud-'))
+    const source = join(root, 'app')
+    const destination = join(root, 'selected')
+    const cloudPaths = [
+      'cloud/apps/relay/src/index.ts',
+      'cloud/apps/push/src/app.test.ts',
+      'cloud/infra/main.tf',
+      'cloud/dev/scripts/deploy.mjs',
+      'cloud/.env',
+      'cloud/packages/push-contract/src/push-host-proof-vector.json'
+    ]
+    const runtimePaths = [
+      'package.json',
+      'out/main/index.js',
+      'out/cli/index.js',
+      'out/main/runtime/mobile-cloud-relay/index.js',
+      'out/main/runtime/push/push-host-proof.js',
+      'out/shared/mobile-push-contract.js',
+      'out/renderer/index.html',
+      'out/web/assets/cloud/client.js',
+      'resources/cloud/icon.png'
+    ]
+    try {
+      for (const fixturePath of [...cloudPaths, ...runtimePaths]) {
+        const file = join(source, fixturePath)
+        await mkdir(dirname(file), { recursive: true })
+        await writeFile(file, fixturePath)
+      }
+      await copyFiles([
+        new FileMatcher(source, destination, (value) => value, electronBuilderConfig.files)
+      ])
+      expect(existsSync(join(destination, 'cloud'))).toBe(false)
+      for (const runtimePath of runtimePaths) {
+        expect(await readFile(join(destination, runtimePath), 'utf8')).toBe(runtimePath)
+      }
+    } finally {
+      await rm(root, { recursive: true, force: true })
+    }
+  })
+})
diff --git a/config/scripts/pr-package-test-paths.mjs b/config/scripts/pr-package-test-paths.mjs
index 05cdc5a7e31..fb5e11da5da 100644
--- a/config/scripts/pr-package-test-paths.mjs
+++ b/config/scripts/pr-package-test-paths.mjs
@@ -1,4 +1,5 @@
 export const LINUX_PACKAGE_TESTS = [
+  'config/scripts/packaged-cloud-source-exclusion.test.mjs',
   'src/main/browser/popup-origin-chrome.electron.test.ts',
   'src/main/browser/browser-link-materialization.electron.test.ts',
   'src/main/browser/browser-client-page-renderer-lifecycle.electron.test.ts',