perf: cache app resolution

src/platforms/__tests__/app-resolution-cache.test.ts

@@ -0,0 +1,55 @@
+import { test } from 'vitest';
+import assert from 'node:assert/strict';
+import { createAppResolutionCache } from '../app-resolution-cache.ts';
+
+test('app resolution cache returns values until the expiry boundary', () => {
+  let nowMs = 1_000;
+  const cache = createAppResolutionCache<string>({ ttlMs: 50, nowMs: () => nowMs });
+  const scope = { platform: 'android', deviceId: 'device-a' } as const;
+
+  assert.equal(cache.set(scope, 'Maps', 'com.example.maps'), 'com.example.maps');
+  assert.equal(cache.get(scope, 'maps'), 'com.example.maps');
+
+  nowMs = 1_049;
+  assert.equal(cache.get(scope, 'Maps'), 'com.example.maps');
+
+  nowMs = 1_050;
+  assert.equal(cache.get(scope, 'Maps'), undefined);
+  assert.equal(cache.get(scope, 'Maps'), undefined);
+});
+
+test('app resolution cache clear removes all variants for one device', () => {
+  const cache = createAppResolutionCache<string>({ nowMs: () => 0 });
+  const mobile = { platform: 'android', deviceId: 'device-a', variant: 'mobile' } as const;
+  const tv = { platform: 'android', deviceId: 'device-a', variant: 'tv' } as const;
+  const otherDevice = { platform: 'android', deviceId: 'device-b', variant: 'mobile' } as const;
+  const otherPlatform = { platform: 'ios', deviceId: 'device-a', variant: 'simulator' } as const;
+
+  cache.set(mobile, 'Maps', 'com.example.mobile.maps');
+  cache.set(tv, 'Maps', 'com.example.tv.maps');
+  cache.set(otherDevice, 'Maps', 'com.example.other.maps');
+  cache.set(otherPlatform, 'Maps', 'com.example.ios.maps');
+
+  cache.clear(mobile);
+
+  assert.equal(cache.get(mobile, 'Maps'), undefined);
+  assert.equal(cache.get(tv, 'Maps'), undefined);
+  assert.equal(cache.get(otherDevice, 'Maps'), 'com.example.other.maps');
+  assert.equal(cache.get(otherPlatform, 'Maps'), 'com.example.ios.maps');
+});
+
+test('app resolution cache invalidates before and after an operation', async () => {
+  const cache = createAppResolutionCache<string>({ nowMs: () => 0 });
+  const scope = { platform: 'ios', deviceId: 'device-a', variant: 'simulator' } as const;
+
+  cache.set(scope, 'Maps', 'com.example.before');
+
+  const result = await cache.invalidateWhile(scope, async () => {
+    assert.equal(cache.get(scope, 'Maps'), undefined);
+    cache.set(scope, 'Maps', 'com.example.during');
+    return 'installed';
+  });
+
+  assert.equal(result, 'installed');
+  assert.equal(cache.get(scope, 'Maps'), undefined);
+});

src/platforms/android/__tests__/index.test.ts

@@ -10,6 +10,7 @@ import {
   getAndroidKeyboardState,
   inferAndroidAppName,
   installAndroidApp,
+  installAndroidInstallablePath,
   isAmStartError,
   listAndroidApps,
   openAndroidApp,
@@ -978,6 +979,82 @@ test('resolveAndroidApp does not treat file paths as package names', async () =>
   );
 });
 
+test('resolveAndroidApp caches display-name package matches but bypasses exact package ids', async () => {
+  await withMockedAdb(
+    'agent-device-android-resolve-cache-',
+    [
+      '#!/bin/sh',
+      'printf "%s\\n" "$*" >> "$AGENT_DEVICE_TEST_ARGS_FILE"',
+      'if [ "$1" = "-s" ]; then shift; shift; fi',
+      'if [ "$1" = "shell" ] && [ "$2" = "pm" ] && [ "$3" = "list" ] && [ "$4" = "packages" ]; then',
+      '  echo "package:com.example.cachemaps"',
+      '  exit 0',
+      'fi',
+      'exit 1',
+      '',
+    ].join('\n'),
+    async ({ argsLogPath, device }) => {
+      const first = await resolveAndroidApp(device, 'cachemaps');
+      const second = await resolveAndroidApp(device, 'cachemaps');
+      const exact = await resolveAndroidApp(device, 'com.example.cachemaps');
+
+      assert.deepEqual(first, { type: 'package', value: 'com.example.cachemaps' });
+      assert.deepEqual(second, first);
+      assert.deepEqual(exact, { type: 'package', value: 'com.example.cachemaps' });
+
+      const logged = await fs.readFile(argsLogPath, 'utf8');
+      assert.equal((logged.match(/pm list packages/g) ?? []).length, 1);
+    },
+  );
+});
+
+test('installAndroidInstallablePath invalidates cached display-name package matches', async () => {
+  await withMockedAdb(
+    'agent-device-android-install-cache-',
+    [
+      '#!/bin/sh',
+      'printf "%s\\n" "$*" >> "$AGENT_DEVICE_TEST_ARGS_FILE"',
+      'if [ "$1" = "-s" ]; then shift; shift; fi',
+      'if [ "$1" = "shell" ] && [ "$2" = "pm" ] && [ "$3" = "list" ] && [ "$4" = "packages" ]; then',
+      '  if [ -f "$AGENT_DEVICE_TEST_INSTALL_MARKER" ]; then',
+      '    echo "package:com.example.installedcachemaps"',
+      '  else',
+      '    echo "package:com.example.cachemaps"',
+      '  fi',
+      '  exit 0',
+      'fi',
+      'if [ "$1" = "install" ] && [ "$2" = "-r" ]; then',
+      '  : > "$AGENT_DEVICE_TEST_INSTALL_MARKER"',
+      '  exit 0',
+      'fi',
+      'exit 1',
+      '',
+    ].join('\n'),
+    async ({ device }) => {
+      const tmpDir = await fs.mkdtemp(path.join(os.tmpdir(), 'agent-device-android-cache-apk-'));
+      const apkPath = path.join(tmpDir, 'App.apk');
+      const previousMarker = process.env.AGENT_DEVICE_TEST_INSTALL_MARKER;
+      process.env.AGENT_DEVICE_TEST_INSTALL_MARKER = path.join(tmpDir, 'installed.marker');
+      try {
+        await fs.writeFile(apkPath, '', 'utf8');
+        const before = await resolveAndroidApp(device, 'cachemaps');
+        await installAndroidInstallablePath(device, apkPath);
+        const after = await resolveAndroidApp(device, 'cachemaps');
+
+        assert.deepEqual(before, { type: 'package', value: 'com.example.cachemaps' });
+        assert.deepEqual(after, { type: 'package', value: 'com.example.installedcachemaps' });
+      } finally {
+        if (previousMarker === undefined) {
+          delete process.env.AGENT_DEVICE_TEST_INSTALL_MARKER;
+        } else {
+          process.env.AGENT_DEVICE_TEST_INSTALL_MARKER = previousMarker;
+        }
+        await fs.rm(tmpDir, { recursive: true, force: true });
+      }
+    },
+  );
+});
+
 test('openAndroidApp default launch uses -p package flag', async () => {
   await withMockedAdb(
     'agent-device-android-open-default-',

src/platforms/android/app-lifecycle.ts

@@ -5,6 +5,7 @@ import { resolveFileOverridePath, runCmd, whichCmd } from '../../utils/exec.ts';
 import { AppError } from '../../utils/errors.ts';
 import type { DeviceInfo } from '../../utils/device.ts';
 import { isDeepLinkTarget } from '../../core/open-target.ts';
+import { createAppResolutionCache, type AppResolutionCacheScope } from '../app-resolution-cache.ts';
 import { waitForAndroidBoot } from './devices.ts';
 import { adbArgs } from './adb.ts';
 import { classifyAndroidAppTarget } from './open-target.ts';
@@ -34,16 +35,28 @@ const ANDROID_APPS_DISCOVERY_HINT =
 const ANDROID_AMBIGUOUS_APP_HINT =
   'Run agent-device apps --platform android to see the exact installed package names before retrying open.';
 
+type AndroidAppResolution = { type: 'intent' | 'package'; value: string };
+
+const androidAppResolutionCache = createAppResolutionCache<AndroidAppResolution>();
+
+function androidAppResolutionScope(device: DeviceInfo): AppResolutionCacheScope {
+  return { platform: 'android', deviceId: device.id, variant: device.target ?? '' };
+}
+
 export async function resolveAndroidApp(
   device: DeviceInfo,
   app: string,
-): Promise<{ type: 'intent' | 'package'; value: string }> {
+): Promise<AndroidAppResolution> {
   const trimmed = app.trim();
   if (classifyAndroidAppTarget(trimmed) === 'package') return { type: 'package', value: trimmed };
 
   const alias = ALIASES[trimmed.toLowerCase()];
   if (alias) return alias;
 
+  const cacheScope = androidAppResolutionScope(device);
+  const cached = androidAppResolutionCache.get(cacheScope, trimmed);
+  if (cached) return cached;
+
   const result = await runCmd('adb', adbArgs(device, ['shell', 'pm', 'list', 'packages']));
   const packages = result.stdout
     .split('\n')
@@ -54,7 +67,10 @@ export async function resolveAndroidApp(
     pkg.toLowerCase().includes(trimmed.toLowerCase()),
   );
   if (matches.length === 1) {
-    return { type: 'package', value: matches[0] };
+    return androidAppResolutionCache.set(cacheScope, trimmed, {
+      type: 'package',
+      value: matches[0],
+    });
   }
 
   if (matches.length > 1) {
@@ -560,10 +576,12 @@ export async function installAndroidInstallablePath(
   device: DeviceInfo,
   installablePath: string,
 ): Promise<void> {
-  if (!device.booted) {
-    await waitForAndroidBoot(device.id);
-  }
-  await installAndroidAppFiles(device, installablePath);
+  await androidAppResolutionCache.invalidateWhile(androidAppResolutionScope(device), async () => {
+    if (!device.booted) {
+      await waitForAndroidBoot(device.id);
+    }
+    await installAndroidAppFiles(device, installablePath);
+  });
 }
 
 export async function installAndroidInstallablePathAndResolvePackageName(
@@ -617,18 +635,23 @@ export async function reinstallAndroidApp(
   app: string,
   appPath: string,
 ): Promise<{ package: string }> {
-  if (!device.booted) {
-    await waitForAndroidBoot(device.id);
-  }
-  const { package: pkg } = await uninstallAndroidApp(device, app);
-  const prepared = await prepareAndroidInstallArtifact(
-    { kind: 'path', path: appPath },
-    { resolveIdentity: false },
+  return await androidAppResolutionCache.invalidateWhile(
+    androidAppResolutionScope(device),
+    async () => {
+      if (!device.booted) {
+        await waitForAndroidBoot(device.id);
+      }
+      const { package: pkg } = await uninstallAndroidApp(device, app);
+      const prepared = await prepareAndroidInstallArtifact(
+        { kind: 'path', path: appPath },
+        { resolveIdentity: false },
+      );
+      try {
+        await installAndroidInstallablePath(device, prepared.installablePath);
+      } finally {
+        await prepared.cleanup();
+      }
+      return { package: pkg };
+    },
   );
-  try {
-    await installAndroidInstallablePath(device, prepared.installablePath);
-    return { package: pkg };
-  } finally {
-    await prepared.cleanup();
-  }
 }

src/platforms/app-resolution-cache.ts

@@ -0,0 +1,80 @@
+const APP_RESOLUTION_CACHE_TTL_MS = 30_000;
+
+export type AppResolutionCacheScope = {
+  platform: 'android' | 'ios' | 'macos';
+  deviceId: string;
+  variant?: string;
+};
+
+type AppResolutionCacheEntry<T> = {
+  value: T;
+  expiresAtMs: number;
+};
+
+type AppResolutionCache<T> = {
+  get(scope: AppResolutionCacheScope, target: string): T | undefined;
+  set(scope: AppResolutionCacheScope, target: string, value: T): T;
+  clear(scope: AppResolutionCacheScope): void;
+  invalidateWhile<Result>(
+    scope: AppResolutionCacheScope,
+    operation: () => Promise<Result>,
+  ): Promise<Result>;
+};
+
+export function createAppResolutionCache<T>(
+  options: { ttlMs?: number; nowMs?: () => number } = {},
+): AppResolutionCache<T> {
+  const ttlMs = options.ttlMs ?? APP_RESOLUTION_CACHE_TTL_MS;
+  const nowMs = options.nowMs ?? Date.now;
+  const entries = new Map<string, AppResolutionCacheEntry<T>>();
+  const clearScope = (scope: AppResolutionCacheScope): void => {
+    const prefix = buildAppResolutionCacheScopePrefix(scope);
+    for (const key of entries.keys()) {
+      if (key.startsWith(prefix)) {
+        entries.delete(key);
+      }
+    }
+  };
+
+  return {
+    get(scope, target) {
+      const key = buildAppResolutionCacheKey(scope, target);
+      const entry = entries.get(key);
+      if (!entry) return undefined;
+      if (entry.expiresAtMs <= nowMs()) {
+        entries.delete(key);
+        return undefined;
+      }
+      return entry.value;
+    },
+    set(scope, target, value) {
+      entries.set(buildAppResolutionCacheKey(scope, target), {
+        value,
+        expiresAtMs: nowMs() + ttlMs,
+      });
+      return value;
+    },
+    clear(scope) {
+      clearScope(scope);
+    },
+    async invalidateWhile(scope, operation) {
+      clearScope(scope);
+      try {
+        return await operation();
+      } finally {
+        // A concurrent name lookup can finish after the initial clear and repopulate stale data.
+        clearScope(scope);
+      }
+    },
+  };
+}
+
+function buildAppResolutionCacheKey(scope: AppResolutionCacheScope, target: string): string {
+  return [scope.platform, scope.deviceId, scope.variant ?? '', target.trim().toLowerCase()].join(
+    '\0',
+  );
+}
+
+function buildAppResolutionCacheScopePrefix(scope: AppResolutionCacheScope): string {
+  return [scope.platform, scope.deviceId, ''].join('\0');
+}