fix(ios): raise deployment target to 17.0 and stabilize Babel hoisting (#1085)

## Summary
- Bumps the iOS deployment target from 15.1 to 17.0 everywhere (podspec,
tracked app xcodeprojs and Podfile, Expo apps via
`expo-build-properties`) so the target matches the prebuilt executorch
libraries (minos 17.0). Silences the "was built for newer iOS version"
linker warnings that previously ran at the end of every iOS build.
- Re-adds `expo-router` to the workspace root `devDependencies` so Yarn
hoists it next to `babel-preset-expo`. Without this,
`babel-preset-expo`'s `require.resolve('expo-router')` check fails, its
expo-router Babel plugin is never registered,
`process.env.EXPO_ROUTER_APP_ROOT` stays un-inlined, and Metro rejects
`require.context` in `expo-router/_ctx.ios.js`. Reverts the incidental
breakage from #1083.
- Scopes `logFilters` in `.yarnrc.yml` to silence the YN0002 lines for
the root workspace's expo-router peers (and the YN0086 summary).
Warnings from any other workspace still surface. The mechanism mirrors
the existing `@signalwire/docusaurus-theme-llms-txt` filter.
- Updates React Native Audio Api to version 0.12.0

### Why iOS 17 specifically
The executorch prebuilt libraries (`libexecutorch_ios.a`,
`libbackend_xnnpack_ios.a`, etc.) and `ExecutorchLib.xcframework` are
built with `minos=17.0`. Linking them into an app with a lower
deployment target produces a run of linker warnings on every build.
README already documents iOS 17.0 as the minimum supported version, so
this change also brings build configs in line with the docs.

### Remaining warnings after this PR
- **phonemis** — shipped with `minos=26.0`, which is way above the app
target. Out of scope here; the library is being rebuilt by a separate
team member.
- **pthreadpool** (minos 12/14) and **cpuinfo** (LC_VERSION_MIN 11) —
*below* 17.0, so they don't trigger "built for newer" warnings. No
action needed today; worth rebuilding next time those libraries touch
the repo for consistency.

## Test plan
- [ ] `yarn` at repo root completes without YN0002 / YN0086 warnings (PR
#1083's original goal, preserved).
- [ ] For each Expo app
(`apps/{llm,computer-vision,speech,text-embeddings}`): `rm -rf ios &&
yarn ios` successfully prebuilds, installs pods, and builds.
- [ ] In each app's build log, the previous block of "object file was
built for newer iOS version (17.0) than being linked (15.1)" warnings
from executorch libs is gone.
- [ ] `apps/bare-rn`: `pod install && yarn ios` builds; no executorch
version-mismatch linker warnings.
- [ ] Metro bundles successfully for Expo apps using expo-router (`llm`,
`computer-vision`, `text-embeddings`) — the `_ctx.ios.js`
`require.context` error reported during development is resolved by the
hoist fix.
- [ ] `apps/llm` builds on Xcode 26.4 without the `size_t` /
`Constants.h` compile error from `react-native-audio-api`.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: msluszniak

.yarnrc.yml

@@ -15,8 +15,25 @@ nodeLinker: node-modules
 # a React 19-compatible peer range, bump it in docs/package.json and
 # remove this filter — we'd rather follow upstream than carry a local
 # suppression.
+#
+# The root workspace declares `expo-router` as a devDependency only to
+# force Yarn to hoist it into the root node_modules alongside
+# babel-preset-expo. babel-preset-expo calls require.resolve('expo-router')
+# from its own location to decide whether to register the expo-router Babel
+# plugin; if the two packages live in different node_modules folders (which
+# happens when expo-router ends up per-app and babel-preset-expo is hoisted),
+# process.env.EXPO_ROUTER_APP_ROOT never gets replaced and Metro fails to
+# bundle expo-router/_ctx.ios.js. Because the root workspace doesn't actually
+# execute expo-router code, it legitimately doesn't provide its peers — each
+# app that consumes expo-router declares them directly. The pattern below
+# silences the resulting YN0002 lines about the ROOT workspace only;
+# unmet peer warnings from any other workspace still surface.
 logFilters:
   - pattern: '*@signalwire/docusaurus-theme-llms-txt*'
     level: discard
+  - pattern: "react-native-executorch-monorepo@workspace:. doesn't provide*requested by expo-router*"
+    level: discard
+  - code: YN0086
+    level: discard
 
 yarnPath: .yarn/releases/yarn-4.1.1.cjs

apps/bare-rn/ios/Podfile

@@ -5,7 +5,7 @@ require Pod::Executable.execute_command('node', ['-p',
     {paths: [process.argv[1]]},
   )', __dir__]).strip
 
-platform :ios, min_ios_version_supported
+platform :ios, '17.0'
 prepare_react_native_project!
 
 linkage = ENV['USE_FRAMEWORKS']

apps/bare-rn/ios/bare-rn.xcodeproj/project.pbxproj

@@ -262,7 +262,7 @@
 				CURRENT_PROJECT_VERSION = 1;
 				ENABLE_BITCODE = NO;
 				INFOPLIST_FILE = "bare-rn/Info.plist";
-				IPHONEOS_DEPLOYMENT_TARGET = 15.1;
+				IPHONEOS_DEPLOYMENT_TARGET = 17.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -291,7 +291,7 @@
 				CLANG_ENABLE_MODULES = YES;
 				CURRENT_PROJECT_VERSION = 1;
 				INFOPLIST_FILE = "bare-rn/Info.plist";
-				IPHONEOS_DEPLOYMENT_TARGET = 15.1;
+				IPHONEOS_DEPLOYMENT_TARGET = 17.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -360,7 +360,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 15.1;
+				IPHONEOS_DEPLOYMENT_TARGET = 17.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					/usr/lib/swift,
 					"$(inherited)",
@@ -429,7 +429,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 15.1;
+				IPHONEOS_DEPLOYMENT_TARGET = 17.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					/usr/lib/swift,
 					"$(inherited)",

apps/computer-vision/app.json

@@ -39,6 +39,9 @@
         {
           "android": {
             "minSdkVersion": 26
+          },
+          "ios": {
+            "deploymentTarget": "17.0"
           }
         }
       ]

apps/llm/app.json

@@ -38,6 +38,14 @@
           "androidForegroundService": true,
           "androidFSTypes": ["mediaPlayback"]
         }
+      ],
+      [
+        "expo-build-properties",
+        {
+          "ios": {
+            "deploymentTarget": "17.0"
+          }
+        }
       ]
     ],
     "newArchEnabled": true,

apps/llm/app/voice_chat/index.tsx

@@ -69,13 +69,7 @@ function VoiceChatScreen() {
     useState<STTModelSources>(WHISPER_TINY_EN);
   const [error, setError] = useState<string | null>(null);
 
-  const [recorder] = useState(
-    () =>
-      new AudioRecorder({
-        sampleRate: 16000,
-        bufferLengthInSamples: 1600,
-      })
-  );
+  const [recorder] = useState(() => new AudioRecorder());
 
   const { setGlobalGenerating } = useContext(GeneratingContext);
 
@@ -92,7 +86,7 @@ function VoiceChatScreen() {
     AudioManager.setAudioSessionOptions({
       iosCategory: 'playAndRecord',
       iosMode: 'spokenAudio',
-      iosOptions: ['allowBluetooth', 'defaultToSpeaker'],
+      iosOptions: ['allowBluetoothHFP', 'defaultToSpeaker'],
     });
     AudioManager.requestRecordingPermissions();
   }, []);
@@ -106,9 +100,17 @@ function VoiceChatScreen() {
       setIsRecording(true);
       setLiveTranscription('');
 
-      recorder.onAudioReady(({ buffer }) => {
-        speechToText.streamInsert(buffer.getChannelData(0));
-      });
+      const sampleRate = 16000;
+      recorder.onAudioReady(
+        {
+          sampleRate,
+          bufferLength: 0.1 * sampleRate,
+          channelCount: 1,
+        },
+        ({ buffer }) => {
+          speechToText.streamInsert(buffer.getChannelData(0));
+        }
+      );
       recorder.start();
 
       let finalResult = '';

apps/llm/metro.config.js

@@ -1,7 +1,4 @@
 const { getDefaultConfig } = require('expo/metro-config');
-const {
-  wrapWithAudioAPIMetroConfig,
-} = require('react-native-audio-api/metro-config');
 
 const config = getDefaultConfig(__dirname);
 
@@ -19,4 +16,4 @@ config.resolver = {
 
 config.resolver.assetExts.push('pte');
 
-module.exports = wrapWithAudioAPIMetroConfig(config);
+module.exports = config;

apps/llm/package.json

@@ -16,6 +16,7 @@
     "@react-navigation/native": "^7.1.28",
     "expo": "^54.0.27",
     "expo-brightness": "~14.0.8",
+    "expo-build-properties": "~1.0.10",
     "expo-calendar": "~15.0.8",
     "expo-constants": "~18.0.11",
     "expo-document-picker": "~13.0.3",
@@ -26,7 +27,7 @@
     "metro-config": "^0.81.5",
     "react": "19.1.0",
     "react-native": "0.81.5",
-    "react-native-audio-api": "^0.8.2",
+    "react-native-audio-api": "0.12.0",
     "react-native-device-info": "^15.0.2",
     "react-native-executorch": "workspace:*",
     "react-native-executorch-expo-resource-fetcher": "workspace:*",

apps/speech/app.json

@@ -54,6 +54,14 @@
           "androidForegroundService": true,
           "androidFSTypes": ["mediaPlayback", "microphone"]
         }
+      ],
+      [
+        "expo-build-properties",
+        {
+          "ios": {
+            "deploymentTarget": "17.0"
+          }
+        }
       ]
     ]
   }

apps/speech/package.json

@@ -14,6 +14,7 @@
     "@react-native/metro-config": "^0.84.0",
     "buffer": "^6.0.3",
     "expo": "^54.0.27",
+    "expo-build-properties": "~1.0.10",
     "expo-font": "~14.0.10",
     "expo-status-bar": "~3.0.9",
     "metro-config": "^0.81.5",