fix: support newest MLC on iOS, fix isAvailable check on Android

apps/expo-example/src/components/adapters/mlcModelSetupAdapter.ts

@@ -1,6 +1,7 @@
 import type { LanguageModelV3 } from '@ai-sdk/provider'
 import { mlc } from '@react-native-ai/mlc'
 import { File, Paths } from 'expo-file-system'
+import { Platform } from 'react-native'
 
 import type { Availability, SetupAdapter } from '../../config/providers.common'
 
@@ -19,7 +20,14 @@ export const createMLCLanguageSetupAdapter = (
     },
     builtIn: false,
     isAvailable(): Availability {
-      return new File(Paths.document, model.modelId, 'tensor-cache.json').exists
+      return new File(
+        Paths.document,
+        ...(Platform.select({
+          ios: ['bundle'],
+        }) ?? []),
+        model.modelId,
+        'tensor-cache.json'
+      ).exists
         ? 'yes'
         : 'availableForDownload'
     },

packages/mlc/ATTRIBUTIONS.md

@@ -1,8 +1,7 @@
-Third-Party Notices
-===================
+# Third-Party Notices
+
+## MLC-LLM (mlc-ai/mlc-llm)
 
-MLC-LLM (mlc-ai/mlc-llm)
------------------------
 Portions of the iOS engine implementation are derived from the MLC-LLM project,
 and the prebuilt runtime binaries shipped in this package are based on MLC-LLM.
 
@@ -14,7 +13,6 @@ License: Apache License, Version 2.0
 License URL: https://www.apache.org/licenses/LICENSE-2.0
 
 Derived source files in this package:
+
 - packages/mlc/ios/engine/LLMEngine.h
 - packages/mlc/ios/engine/LLMEngine.mm
-- packages/mlc/ios/engine/JSONFFIEngine.h
-- packages/mlc/ios/engine/JSONFFIEngine.mm

packages/mlc/android/src/main/java/com/callstack/ai/NativeMLCEngineModule.kt

@@ -307,7 +307,7 @@ class NativeMLCEngineModule(reactContext: ReactApplicationContext) : NativeMLCEn
 
   private fun getModelConfig(modelId: String): Pair<ModelRecord, File>? {
     val modelRecord = appConfig.model_list.find { it.model_id == modelId } ?: return null
-    val modelDir = File(reactApplicationContext.getExternalFilesDir(""), modelRecord.model_id)
+    val modelDir = File(reactApplicationContext.getFilesDir(), modelRecord.model_id)
     return Pair(modelRecord, modelDir)
   }
 }