Catch broken desktop packages before release (#2114)

* test(desktop): exercise packaged app startup

The previous smoke exited before IPC, window creation, and preload execution, so a broken packaged preload could still pass. Launch the normal app and observe its renderer bridge and managed daemon through CDP instead.

* test(desktop): preserve Linux sandbox in smoke

Configure the unpacked artifact's chrome-sandbox helper with the permissions Electron requires, while keeping sandboxing enabled so preload failures remain observable. Bound startup probes and include process logs in daemon timeout failures.

* ci(desktop): keep packaged smoke on releases

Remove the temporary pull-request artifact build after it validated the Linux launch path. Keep the real packaged smoke in the native desktop release matrix.

* ci(desktop): gate packaged smoke by changes

Run the Linux real-artifact smoke in pull-request CI when packages/desktop changes, while leaving the regular desktop unit-test matrix unconditional.

.github/workflows/ci.yml

@@ -131,9 +131,22 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest]
     runs-on: ${{ matrix.os }}
+    timeout-minutes: 30
+    permissions:
+      contents: read
+      pull-requests: read
     steps:
       - uses: actions/checkout@v4
 
+      - name: Detect desktop changes
+        if: matrix.os == 'ubuntu-latest'
+        id: desktop_changes
+        uses: dorny/paths-filter@v3
+        with:
+          filters: |
+            desktop:
+              - 'packages/desktop/**'
+
       - uses: actions/setup-node@v4
         with:
           node-version: "22"
@@ -147,6 +160,27 @@ jobs:
       - name: Run desktop tests
         run: npm run test --workspace=@getpaseo/desktop
 
+      - name: Install virtual display
+        if: matrix.os == 'ubuntu-latest' && steps.desktop_changes.outputs.desktop == 'true'
+        run: sudo apt-get update && sudo apt-get install -y xvfb xauth
+
+      - name: Build and smoke unpacked desktop app
+        if: matrix.os == 'ubuntu-latest' && steps.desktop_changes.outputs.desktop == 'true'
+        run: npm run build:desktop -- --publish never --linux --x64 --dir
+        env:
+          EP_GH_IGNORE_TIME: true
+          PASEO_DESKTOP_SMOKE: "1"
+          PASEO_DESKTOP_SMOKE_ARTIFACT_DIR: ${{ runner.temp }}/desktop-smoke
+
+      - name: Upload packaged smoke diagnostics
+        if: failure() && matrix.os == 'ubuntu-latest' && steps.desktop_changes.outputs.desktop == 'true'
+        uses: actions/upload-artifact@v4
+        with:
+          name: desktop-packaged-smoke-linux-x64
+          path: ${{ runner.temp }}/desktop-smoke
+          if-no-files-found: ignore
+          retention-days: 7
+
   app-tests:
     runs-on: ubuntu-latest
     env:

.github/workflows/desktop-release.yml

@@ -158,6 +158,7 @@ jobs:
           APPLE_APP_SPECIFIC_PASSWORD: ${{ secrets.APPLE_PASSWORD }}
           APPLE_TEAM_ID: ${{ secrets.APPLE_TEAM_ID }}
           PASEO_DESKTOP_SMOKE: "1"
+          PASEO_DESKTOP_SMOKE_ARTIFACT_DIR: ${{ runner.temp }}/desktop-smoke
         run: |
           set -euo pipefail
           build_args=(-- --publish never --mac --${{ matrix.electron_arch }})
@@ -165,6 +166,15 @@ jobs:
           build_args+=("-c.publish.channel=$RELEASE_CHANNEL")
           npm run build:desktop "${build_args[@]}"
 
+      - name: Upload packaged smoke diagnostics
+        if: failure()
+        uses: actions/upload-artifact@v4
+        with:
+          name: desktop-smoke-macos-${{ matrix.electron_arch }}
+          path: ${{ runner.temp }}/desktop-smoke
+          if-no-files-found: ignore
+          retention-days: 7
+
       - name: Upload desktop artifacts to release
         if: env.SHOULD_PUBLISH == 'true' && env.IS_SMOKE_TAG != 'true'
         env:
@@ -248,7 +258,7 @@ jobs:
           NODE
 
       - name: Install Linux smoke display
-        run: sudo apt-get update && sudo apt-get install -y xvfb
+        run: sudo apt-get update && sudo apt-get install -y xvfb xauth
 
       - name: Build desktop release
         shell: bash
@@ -256,6 +266,7 @@ jobs:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           EP_GH_IGNORE_TIME: true
           PASEO_DESKTOP_SMOKE: "1"
+          PASEO_DESKTOP_SMOKE_ARTIFACT_DIR: ${{ runner.temp }}/desktop-smoke
         run: |
           set -euo pipefail
           build_args=(-- --publish never --linux --x64)
@@ -263,6 +274,15 @@ jobs:
           build_args+=("-c.publish.channel=$RELEASE_CHANNEL")
           npm run build:desktop "${build_args[@]}"
 
+      - name: Upload packaged smoke diagnostics
+        if: failure()
+        uses: actions/upload-artifact@v4
+        with:
+          name: desktop-smoke-linux-x64
+          path: ${{ runner.temp }}/desktop-smoke
+          if-no-files-found: ignore
+          retention-days: 7
+
       - name: Upload desktop artifacts to release
         if: env.SHOULD_PUBLISH == 'true' && env.IS_SMOKE_TAG != 'true'
         env:
@@ -351,6 +371,7 @@ jobs:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           EP_GH_IGNORE_TIME: true
           PASEO_DESKTOP_SMOKE: "1"
+          PASEO_DESKTOP_SMOKE_ARTIFACT_DIR: ${{ runner.temp }}/desktop-smoke
         run: |
           set -euo pipefail
           build_args=(-- --publish never --win --x64 --arm64)
@@ -358,6 +379,15 @@ jobs:
           build_args+=("-c.publish.channel=$RELEASE_CHANNEL")
           npm run build:desktop "${build_args[@]}"
 
+      - name: Upload packaged smoke diagnostics
+        if: failure()
+        uses: actions/upload-artifact@v4
+        with:
+          name: desktop-smoke-windows-x64
+          path: ${{ runner.temp }}/desktop-smoke
+          if-no-files-found: ignore
+          retention-days: 7
+
       - name: Upload desktop artifacts to release
         if: env.SHOULD_PUBLISH == 'true' && env.IS_SMOKE_TAG != 'true'
         env:

docs/testing.md

@@ -91,6 +91,27 @@ function createTestEmailSender() {
 
 When a test is labeled end-to-end, it calls the real service. No environment variable gates, no conditional skipping, no mocking the external dependency.
 
+### Packaged desktop smoke
+
+The packaged desktop smoke is an external observer of the production launch path. It must not add a smoke-only branch to Electron main or start the daemon itself.
+
+The harness launches the unpacked packaged app with isolated user data and daemon state, connects to the real renderer over Chromium's debugging protocol, and requires all of these outcomes:
+
+- the `paseo://app/` renderer mounts into `#root`;
+- the sandboxed preload exposes the desktop bridge;
+- the renderer starts a fresh desktop-managed daemon through the normal startup bootstrap;
+- the bundled CLI can query that daemon and run a terminal command.
+
+Pull-request CI runs the Linux x64 smoke under Xvfb when the cumulative PR diff changes `packages/desktop/**`. The desktop release matrix runs the harness against each host-native packaged app before publishing. All smoke jobs upload renderer, desktop, and daemon diagnostics on failure.
+
+To exercise the smoke locally on Linux:
+
+```bash
+PASEO_DESKTOP_SMOKE=1 \
+PASEO_DESKTOP_SMOKE_ARTIFACT_DIR=/tmp/paseo-desktop-smoke \
+npm run build:desktop -- --publish never --linux --x64 --dir
+```
+
 ## Test organization
 
 - Collocate tests with implementation: `thing.ts` + `thing.test.ts`

packages/desktop/scripts/smoke-packaged-desktop-app.js

@@ -4,12 +4,27 @@ const net = require("node:net");
 const os = require("node:os");
 const path = require("node:path");
 const { setTimeout: delay } = require("node:timers/promises");
+const { chromium } = require("playwright");
 
 const EXECUTABLE_NAME = "Paseo";
 const SMOKE_TIMEOUT_MS = 60_000;
 const EXIT_TIMEOUT_MS = 10_000;
 const TERMINAL_CAPTURE_ATTEMPTS = 20;
 const TERMINAL_CAPTURE_INTERVAL_MS = 500;
+const REQUIRED_DESKTOP_BRIDGE_KEYS = [
+  "platform",
+  "invoke",
+  "getPendingOpenProject",
+  "events",
+  "window",
+  "dialog",
+  "notification",
+  "opener",
+  "editor",
+  "webUtils",
+  "menu",
+  "browser",
+];
 
 function createTempDir(prefix) {
   return fs.mkdtempSync(path.join(os.tmpdir(), prefix));
@@ -52,6 +67,41 @@ function getMacMainExecutablePath(appPath) {
   return path.join(appPath, "Contents", "MacOS", EXECUTABLE_NAME);
 }
 
+function ensureLinuxSandboxPermissions(appPath) {
+  if (process.platform !== "linux") {
+    return;
+  }
+
+  const sandboxPath = path.join(appPath, "chrome-sandbox");
+  if (!fs.existsSync(sandboxPath)) {
+    throw new Error(`Chromium sandbox helper does not exist: ${sandboxPath}`);
+  }
+
+  const hasRequiredPermissions = () => {
+    const stat = fs.statSync(sandboxPath);
+    return stat.uid === 0 && (stat.mode & 0o7777) === 0o4755;
+  };
+  if (hasRequiredPermissions()) {
+    return;
+  }
+
+  const chown = spawnSync("sudo", ["-n", "chown", "root:root", sandboxPath], {
+    encoding: "utf8",
+  });
+  const chmod =
+    chown.status === 0
+      ? spawnSync("sudo", ["-n", "chmod", "4755", sandboxPath], { encoding: "utf8" })
+      : null;
+  if (chown.error || chown.status !== 0 || chmod?.error || chmod?.status !== 0) {
+    throw new Error(
+      `Failed to configure Chromium sandbox helper ${sandboxPath}. Run: sudo chown root:root ${sandboxPath} && sudo chmod 4755 ${sandboxPath}.\n${chown.stderr?.trim() || chmod?.stderr?.trim() || chown.error || chmod?.error || "Permissions remained incorrect."}`,
+    );
+  }
+  if (!hasRequiredPermissions()) {
+    throw new Error(`Chromium sandbox helper permissions remained incorrect: ${sandboxPath}`);
+  }
+}
+
 function getLaunchCommand(executablePath) {
   if (process.platform !== "linux") {
     return {
@@ -62,7 +112,7 @@ function getLaunchCommand(executablePath) {
 
   return {
     command: "xvfb-run",
-    args: ["-a", executablePath],
+    args: ["-a", "--server-args=-screen 0 1280x800x24", executablePath],
   };
 }
 
@@ -103,6 +153,34 @@ function createDefaultDaemonEnv(extraEnv) {
   return env;
 }
 
+function createIsolatedDesktopEnv({ home, listen, userData, cdpPort }) {
+  return {
+    ...process.env,
+    PASEO_HOME: home,
+    PASEO_LISTEN: listen,
+    PASEO_ELECTRON_USER_DATA_DIR: userData,
+    PASEO_ELECTRON_FLAGS: `--remote-debugging-address=127.0.0.1 --remote-debugging-port=${cdpPort}`,
+  };
+}
+
+function configureIsolatedDaemonHome(home, listen) {
+  fs.writeFileSync(
+    path.join(home, "config.json"),
+    `${JSON.stringify(
+      {
+        version: 1,
+        daemon: {
+          listen,
+          relay: { enabled: false },
+          mcp: { enabled: false, injectIntoAgents: false },
+        },
+      },
+      null,
+      2,
+    )}\n`,
+  );
+}
+
 function reserveLocalTcpPort() {
   return new Promise((resolve, reject) => {
     const server = net.createServer();
@@ -205,32 +283,13 @@ function assertDarwinProcessDoesNotUseMainAppExecutable({ appPath, pid, label })
   }
 }
 
-function parseSmokeLine(line) {
-  const prefix = "[paseo-smoke] ";
-  if (!line.startsWith(prefix)) {
-    return null;
-  }
-  return JSON.parse(line.slice(prefix.length));
-}
-
-function appendChunk(lines, chunk, onSmokeMessage) {
-  const text = chunk.toString();
-  lines.push(text);
-  for (const line of text.split(/\r?\n/)) {
-    const parsed = parseSmokeLine(line.trim());
-    if (parsed) {
-      onSmokeMessage(parsed);
-    }
-  }
-}
-
 function readIfExists(filePath) {
   return fs.existsSync(filePath) ? fs.readFileSync(filePath, "utf8") : null;
 }
 
-function formatLogs({ stdout, stderr, userData }) {
+function formatLogs({ stdout, stderr, userData, daemonHome }) {
   const desktopLog = readIfExists(path.join(userData, "logs", "main.log"));
-  const daemonLog = readIfExists(path.join(os.homedir(), ".paseo", "daemon.log"));
+  const daemonLog = readIfExists(path.join(daemonHome, "daemon.log"));
   return [
     `App stdout:\n${stdout.join("").trim() || "<empty>"}`,
     `App stderr:\n${stderr.join("").trim() || "<empty>"}`,
@@ -239,6 +298,55 @@ function formatLogs({ stdout, stderr, userData }) {
   ].join("\n\n");
 }
 
+async function writeFailureArtifacts({ page, stdout, stderr, userData, daemonHome, error }) {
+  const artifactDir = process.env.PASEO_DESKTOP_SMOKE_ARTIFACT_DIR?.trim();
+  if (!artifactDir) {
+    return;
+  }
+
+  fs.mkdirSync(artifactDir, { recursive: true });
+  fs.writeFileSync(
+    path.join(artifactDir, "failure.txt"),
+    `${error instanceof Error ? (error.stack ?? error.message) : String(error)}\n\n${formatLogs({
+      stdout,
+      stderr,
+      userData,
+      daemonHome,
+    })}\n`,
+  );
+
+  const desktopLog = readIfExists(path.join(userData, "logs", "main.log"));
+  if (desktopLog !== null) {
+    fs.writeFileSync(path.join(artifactDir, "desktop-main.log"), desktopLog);
+  }
+  const daemonLog = readIfExists(path.join(daemonHome, "daemon.log"));
+  if (daemonLog !== null) {
+    fs.writeFileSync(path.join(artifactDir, "daemon.log"), daemonLog);
+  }
+
+  if (page) {
+    const renderer = await page
+      .evaluate(() => ({
+        url: window.location.href,
+        title: document.title,
+        rootChildCount: document.querySelector("#root")?.childElementCount ?? 0,
+        rootText: document.querySelector("#root")?.textContent?.trim().slice(0, 2_000) ?? "",
+        bridgeKeys:
+          typeof window.paseoDesktop === "object" && window.paseoDesktop !== null
+            ? Object.keys(window.paseoDesktop)
+            : [],
+      }))
+      .catch((evaluationError) => ({ evaluationError: String(evaluationError) }));
+    fs.writeFileSync(
+      path.join(artifactDir, "renderer.json"),
+      `${JSON.stringify(renderer, null, 2)}\n`,
+    );
+    await page
+      .screenshot({ path: path.join(artifactDir, "renderer.png"), fullPage: true })
+      .catch(() => undefined);
+  }
+}
+
 function isRunning(child) {
   return child.exitCode === null && child.signalCode === null;
 }
@@ -301,70 +409,119 @@ async function removeTempDir(tempDir) {
   }
 }
 
-function waitForSmokeMessage({ child, stdout, stderr, userData, type, validate }) {
+function remainingTime(deadline) {
-  return new Promise((resolve, reject) => {
+  return Math.max(1, deadline - Date.now());
-    let settled = false;
-
-    const finish = (callback, value) => {
-      if (settled) {
-        return;
-      }
-      settled = true;
-      clearTimeout(timer);
-      callback(value);
-    };
-
-    const timer = setTimeout(() => {
-      terminateChild(child);
-      finish(
-        reject,
-        new Error(
-          `Timed out waiting for packaged desktop smoke result.\n${formatLogs({
-            stdout,
-            stderr,
-            userData,
-          })}`,
-        ),
-      );
-    }, SMOKE_TIMEOUT_MS);
-
-    const onSmokeMessage = (message) => {
-      if (message.type !== type) {
-        return;
-      }
-      if (validate(message)) {
-        finish(resolve, message);
-        return;
-      }
-      finish(reject, new Error(`Unexpected desktop smoke message: ${JSON.stringify(message)}`));
-    };
-
-    child.stdout.on("data", (chunk) => appendChunk(stdout, chunk, onSmokeMessage));
-    child.stderr.on("data", (chunk) => appendChunk(stderr, chunk, onSmokeMessage));
-    child.once("error", (error) => finish(reject, error));
-    child.once("exit", (code, signal) => {
-      if (settled) {
-        return;
-      }
-      finish(
-        reject,
-        new Error(
-          `Packaged app exited before reporting smoke success (code ${code}, signal ${
-            signal ?? "none"
-          }).\n${formatLogs({ stdout, stderr, userData })}`,
-        ),
-      );
-    });
-  });
 }
 
-function assertRunningDesktopManagedDaemon(message) {
+async function connectToPackagedApp({
-  return (
+  child,
-    message.status?.status === "running" &&
+  cdpPort,
-    message.status?.desktopManaged === true &&
+  stdout,
-    typeof message.status?.pid === "number" &&
+  stderr,
-    typeof message.status?.listen === "string" &&
+  userData,
-    message.status.listen.length > 0
+  daemonHome,
+  deadline,
+}) {
+  let lastError = null;
+
+  while (Date.now() < deadline) {
+    if (!isRunning(child)) {
+      throw new Error(
+        `Packaged app exited before opening its debugging endpoint (code ${child.exitCode}, signal ${
+          child.signalCode ?? "none"
+        }).\n${formatLogs({ stdout, stderr, userData, daemonHome })}`,
+      );
+    }
+
+    try {
+      return await chromium.connectOverCDP(`http://127.0.0.1:${cdpPort}`);
+    } catch (error) {
+      lastError = error;
+      await delay(250);
+    }
+  }
+
+  throw new Error(
+    `Timed out connecting to the packaged app over CDP: ${lastError}.\n${formatLogs({
+      stdout,
+      stderr,
+      userData,
+      daemonHome,
+    })}`,
+  );
+}
+
+async function waitForPackagedAppPage(browser, deadline) {
+  while (Date.now() < deadline) {
+    const page = browser
+      .contexts()
+      .flatMap((context) => context.pages())
+      .find((candidate) => candidate.url().startsWith("paseo://app/"));
+    if (page) {
+      return page;
+    }
+    await delay(250);
+  }
+  throw new Error("Timed out waiting for the packaged paseo://app/ renderer");
+}
+
+async function assertPackagedRendererLoaded(page, deadline) {
+  await page.waitForFunction(
+    () => {
+      const root = document.querySelector("#root");
+      return root instanceof HTMLElement && root.childElementCount > 0;
+    },
+    undefined,
+    { timeout: remainingTime(deadline) },
+  );
+
+  const bridgeKeys = await page.evaluate(() =>
+    typeof window.paseoDesktop === "object" && window.paseoDesktop !== null
+      ? Object.keys(window.paseoDesktop)
+      : [],
+  );
+  const missingBridgeKeys = REQUIRED_DESKTOP_BRIDGE_KEYS.filter((key) => !bridgeKeys.includes(key));
+  if (missingBridgeKeys.length > 0) {
+    throw new Error(
+      `Packaged renderer is missing desktop preload bridge keys: ${missingBridgeKeys.join(", ")}. Present keys: ${bridgeKeys.join(", ") || "<none>"}`,
+    );
+  }
+}
+
+async function waitForRendererStartedDaemon({
+  page,
+  daemonHome,
+  listen,
+  stdout,
+  stderr,
+  userData,
+  deadline,
+}) {
+  let lastStatus = null;
+  let lastError = null;
+
+  while (Date.now() < deadline) {
+    try {
+      lastStatus = await page.evaluate(() => window.paseoDesktop.invoke("desktop_daemon_status"));
+      if (
+        lastStatus?.status === "running" &&
+        lastStatus.desktopManaged === true &&
+        typeof lastStatus.pid === "number" &&
+        typeof lastStatus.serverId === "string" &&
+        lastStatus.serverId.length > 0 &&
+        lastStatus.listen === listen &&
+        path.resolve(lastStatus.home) === path.resolve(daemonHome)
+      ) {
+        return lastStatus;
+      }
+    } catch (error) {
+      lastError = error;
+    }
+    await delay(250);
+  }
+
+  throw new Error(
+    `Packaged renderer did not start its desktop-managed daemon. Last status: ${JSON.stringify(lastStatus)}. Last error: ${lastError}.\n${formatLogs({ stdout, stderr, userData, daemonHome })}`,
   );
 }
 
@@ -634,12 +791,26 @@ async function stopCliDaemon({ appPath, env }) {
 async function smokePackagedDesktopApp({ appPath }) {
   const executablePath = getExecutablePath(appPath);
   assertExecutable(executablePath, "Packaged app executable");
+  ensureLinuxSandboxPermissions(appPath);
   await smokeColdCliDaemonStart({ appPath });
 
   const userData = createTempDir("paseo-smoke-user-data-");
-  const env = createDefaultDaemonEnv({
+  const daemonHome = createTempDir("paseo-smoke-daemon-home-");
-    PASEO_DESKTOP_SMOKE: "1",
+  const daemonPort = await reserveLocalTcpPort();
-    PASEO_ELECTRON_USER_DATA_DIR: userData,
+  let cdpPort = await reserveLocalTcpPort();
+  for (let attempt = 0; cdpPort === daemonPort && attempt < 10; attempt += 1) {
+    cdpPort = await reserveLocalTcpPort();
+  }
+  if (cdpPort === daemonPort) {
+    throw new Error("Failed to reserve distinct TCP ports for the daemon and CDP");
+  }
+  const listen = `127.0.0.1:${daemonPort}`;
+  configureIsolatedDaemonHome(daemonHome, listen);
+  const env = createIsolatedDesktopEnv({
+    home: daemonHome,
+    listen,
+    userData,
+    cdpPort,
   });
 
   const stdout = [];
@@ -651,7 +822,15 @@ async function smokePackagedDesktopApp({ appPath }) {
     env,
     stdio: ["pipe", "pipe", "pipe"],
   });
-  let smokeStarted = false;
+  child.stdout.on("data", (chunk) => stdout.push(chunk.toString()));
+  child.stderr.on("data", (chunk) => stderr.push(chunk.toString()));
+  child.once("error", (error) =>
+    stderr.push(`Packaged app launch error: ${error.stack ?? error}\n`),
+  );
+  const deadline = Date.now() + SMOKE_TIMEOUT_MS;
+
+  let browser = null;
+  let page = null;
   let daemonStopped = false;
 
   const stopDaemonForCleanup = async () => {
@@ -659,36 +838,53 @@ async function smokePackagedDesktopApp({ appPath }) {
       return;
     }
 
-    await stopCliDaemon({ appPath, env: createDefaultDaemonEnv() });
+    await stopCliDaemon({ appPath, env });
     daemonStopped = true;
   };
 
   try {
-    const message = await waitForSmokeMessage({
+    browser = await connectToPackagedApp({
       child,
+      cdpPort,
       stdout,
       stderr,
       userData,
-      type: "desktop-daemon-smoke-started",
+      daemonHome,
-      validate: assertRunningDesktopManagedDaemon,
+      deadline,
     });
-    smokeStarted = true;
+    page = await waitForPackagedAppPage(browser, deadline);
-    console.log("Packaged desktop smoke: desktop-managed daemon reported running");
+    await assertPackagedRendererLoaded(page, deadline);
-    const cliEnv = createDefaultDaemonEnv();
+    console.log("Packaged desktop smoke: real app renderer and preload bridge loaded");
-    await smokeCliShim({ appPath, env: cliEnv });
+    const status = await waitForRendererStartedDaemon({
-    await smokeCliTerminal({ appPath, env: cliEnv });
+      page,
+      daemonHome,
+      listen,
+      stdout,
+      stderr,
+      userData,
+      deadline,
+    });
+    console.log("Packaged desktop smoke: renderer-started desktop daemon reported running");
+    await smokeCliShim({ appPath, env });
+    await smokeCliTerminal({ appPath, env });
     await stopDaemonForCleanup();
     console.log(
-      `Packaged desktop smoke passed: desktop-managed daemon pid ${message.status.pid}, listen ${message.status.listen}; CLI shim daemon status and terminal smoke succeeded`,
+      `Packaged desktop smoke passed: real renderer and preload loaded; renderer-started desktop daemon pid ${status.pid}, listen ${status.listen}; CLI shim daemon status and terminal smoke succeeded`,
     );
   } catch (error) {
-    if (smokeStarted && !daemonStopped) {
+    await writeFailureArtifacts({ page, stdout, stderr, userData, daemonHome, error }).catch(
+      (artifactError) => {
+        console.warn(`Packaged desktop smoke: failed to write failure artifacts: ${artifactError}`);
+      },
+    );
+    if (!daemonStopped) {
       try {
         await stopDaemonForCleanup();
       } catch {}
     }
     throw error;
   } finally {
+    await browser?.close().catch(() => undefined);
     if (isRunning(child)) {
       terminateChild(child);
       if (!(await waitForChildExit(child))) {
@@ -698,6 +894,7 @@ async function smokePackagedDesktopApp({ appPath }) {
     }
     releaseChildHandles(child);
     await removeTempDir(userData);
+    await removeTempDir(daemonHome);
   }
 }
 

packages/desktop/src/main.ts

@@ -23,7 +23,7 @@ import {
   session,
   webContents,
 } from "electron";
-import { createDaemonCommandHandlers, registerDaemonManager } from "./daemon/daemon-manager.js";
+import { registerDaemonManager } from "./daemon/daemon-manager.js";
 import { parsePassthroughCliArgsFromArgv, runPassthroughCli } from "./daemon/cli/passthrough.js";
 import { closeAllTransportSessions } from "./daemon/local-transport.js";
 import {
@@ -121,8 +121,6 @@ const FORWARDED_PASEO_SHORTCUT_KEYS = new Set([
   "arrowup",
   "arrowdown",
 ]);
-const DESKTOP_SMOKE_ENV = "PASEO_DESKTOP_SMOKE";
-const DESKTOP_SMOKE_STOP_REQUEST = "paseo-smoke-stop";
 app.setName(APP_NAME);
 
 interface AttachedBrowserInput {
@@ -822,53 +820,6 @@ async function runCliPassthroughIfRequested(): Promise<boolean> {
   return true;
 }
 
-async function runDesktopSmokeIfRequested(): Promise<boolean> {
-  if (process.env[DESKTOP_SMOKE_ENV] !== "1") {
-    return false;
-  }
-
-  const handlers = createDaemonCommandHandlers();
-  const startStatus = await handlers.start_desktop_daemon();
-  process.stdout.write(
-    `[paseo-smoke] ${JSON.stringify({
-      type: "desktop-daemon-smoke-started",
-      status: startStatus,
-    })}\n`,
-  );
-
-  await waitForDesktopSmokeStopRequest();
-
-  const stopStatus = await handlers.stop_desktop_daemon();
-  process.stdout.write(
-    `[paseo-smoke] ${JSON.stringify({
-      type: "desktop-daemon-smoke-stopped",
-      stopStatus,
-    })}\n`,
-  );
-
-  app.exit(0);
-  return true;
-}
-
-function waitForDesktopSmokeStopRequest(): Promise<void> {
-  return new Promise((resolve) => {
-    let buffer = "";
-    const stop = () => {
-      process.stdin.off("data", onData);
-      resolve();
-    };
-    const onData = (chunk: Buffer | string) => {
-      buffer += chunk.toString();
-      if (buffer.includes(DESKTOP_SMOKE_STOP_REQUEST)) {
-        stop();
-      }
-    };
-
-    process.stdin.on("data", onData);
-    process.stdin.resume();
-  });
-}
-
 async function bootstrap(): Promise<void> {
   if (!setupSingleInstanceLock()) {
     return;
@@ -912,9 +863,6 @@ async function bootstrap(): Promise<void> {
     },
   });
   ensureNotificationCenterRegistration();
-  if (await runDesktopSmokeIfRequested()) {
-    return;
-  }
   registerDaemonManager();
   registerWindowManager();
   registerDialogHandlers();