diff --git a/config/electron-builder.config.cjs b/config/electron-builder.config.cjs
index 30b61e6b2e7..ef545043146 100644
--- a/config/electron-builder.config.cjs
+++ b/config/electron-builder.config.cjs
@@ -301,6 +301,7 @@ module.exports = {
   // disappears from Agent Session History in packaged builds only. Worker
   // entries reached solely from the Electron main process stay packed, since
   // asar redirects their app.asar paths.
+  // Why: `orca serve` runs the orcad selection entry under ELECTRON_RUN_AS_NODE too (#27307).
   asarUnpack: [
     'out/package.json',
     'out/cli/**',
@@ -327,6 +328,7 @@ module.exports = {
     'out/main/plugin-host-entry.js',
     'out/main/computer-sidecar.js',
     'out/main/parcel-watcher-process-entry.js',
+    'out/main/orcad/orcad-local-serve-selection-entry.js',
     'out/main/chunks/**',
     'resources/**',
     'node_modules/ws/**',
diff --git a/config/scripts/electron-builder-config.test.mjs b/config/scripts/electron-builder-config.test.mjs
index 3daa56d1aa6..2c0af72da98 100644
--- a/config/scripts/electron-builder-config.test.mjs
+++ b/config/scripts/electron-builder-config.test.mjs
@@ -357,6 +357,28 @@ describe('electron-builder config', () => {
     expect(viteConfig).toMatch(new RegExp(`'${entryFilename.replace(/\.js$/, '')}':\\s*resolve\\(`))
   })
 
+  // Why: the CLI runs this entry under ELECTRON_RUN_AS_NODE, which cannot read
+  // app.asar, so a packed copy sends every `orca serve` to Electron (#27307).
+  it('unpacks the orcad serve-selection entry the CLI runs', async () => {
+    const sharedSource = await readFile(
+      join(REPO_ROOT, 'src', 'shared', 'orcad-local-serve-selection.ts'),
+      'utf8'
+    )
+    const entryName = sharedSource.match(/ORCAD_LOCAL_SERVE_SELECTION_ENTRY = '([^']+)'/)?.[1]
+    expect(entryName).toBeDefined()
+
+    const matcher = new FileMatcher(
+      '/app',
+      '/dest',
+      (value) => value,
+      electronBuilderConfig.asarUnpack
+    )
+    const isUnpacked = matcher.createFilter()
+    expect(
+      isUnpacked(join('/app', 'out', 'main', `${entryName}.js`), { isDirectory: () => false })
+    ).toBe(true)
+  })
+
   // Why: the scanner service is forked with ELECTRON_RUN_AS_NODE, so asar is
   // invisible to it and a packed worker entry fails closed — dropping every
   // OpenCode session in packaged builds while dev stays green. Three legs must