Add mobile examples

CLAUDE.md

@@ -71,6 +71,7 @@ audius-cmd stream
 
 - **packages/web**: React web client with Vite, Redux Toolkit, Emotion CSS
 - **packages/mobile**: React Native app for iOS/Android
+- **packages/mobile/examples**: Runnable mobile examples (auth/sign-in, upload) with READMEs for AI and developer reference—see [packages/mobile/examples/README.md](packages/mobile/examples/README.md)
 - **packages/common**: Shared code between web and mobile (state, models, utilities)
 - **packages/sdk**: JavaScript SDK for interacting with Audius protocol
 - **packages/harmony**: Design system components and tokens
@@ -88,6 +89,7 @@ audius-cmd stream
 - SDK (@audius/sdk) handles all protocol interactions
 - Services layer in packages/common/src/services
 - API adapters for web3 and traditional HTTP endpoints
+- **Mobile examples**: For auth (sign-in/OAuth-style), upload, etc., see `packages/mobile/examples/`; each example has a README with run instructions and source-of-truth file paths.
 
 ### Styling Approach
 

package.json

@@ -47,6 +47,7 @@
     "mobile": "npm run start -w @audius/mobile",
     "mobile:clean": "npm run clean:auto -w @audius/mobile && npm run clean:modules",
     "mobile:clear-cache": "watchman watch-del-all && npm run start -w @audius/mobile -- --reset-cache",
+    "mobile:example:trending": "cd packages/mobile/examples/trending && npx expo start",
     "EMBED======================================": "",
     "embed:prod": "npm run start:prod -w embed",
     "embed:stage": "npm run start:stage -w embed",

packages/mobile/examples/README.md

@@ -0,0 +1,36 @@
+# Mobile Examples
+
+Runnable examples for building Audius-style mobile features (React Native). Use these when implementing **authentication (sign-in / OAuth-style flows)** or similar capabilities so that AIs and developers can find reference implementations quickly.
+
+## Quick start (run the app)
+
+From the **repository root** (`apps/`):
+
+```bash
+npm install
+npm run ios:dev      # iOS simulator
+# or
+npm run android:dev  # Android emulator
+```
+
+Environment: copy `packages/mobile/.env.dev` if needed; the app runs against staging by default.
+
+## Available examples
+
+| Example | Description | How to run in the app |
+|--------|-------------|------------------------|
+| [trending](./trending/) | **Expo app**: SDK setup + trending tracks (code example) | From repo root: `cd packages/mobile/examples/trending && npx expo start` or `npm run mobile:example:trending` |
+| [auth-sign-in](./auth-sign-in/) | **Expo app**: OAuth + bearer token (SDK). Main app: Hedgehog email/password. | OAuth example: `cd packages/mobile/examples/auth-sign-in && npx expo start` or `npm run mobile:example:auth-sign-in`. Main app: open app → sign-in. |
+
+## For AI / code search
+
+- **SDK setup (mobile / Expo):** trending example, getSDK, sdk(appName), polyfills, Buffer process, trending tracks.
+- **Authentication**: sign-in, login, OAuth, bearer token, Hedgehog, identity service, `authService`, `createAuthService`, `sdk({ bearerToken })`, `oauth.login`.
+
+Implementation lives in `packages/mobile/src` and `packages/common`; each example folder links to the exact files and entry points.
+
+## Adding new examples
+
+1. Add a new directory under `packages/mobile/examples/<example-name>/`.
+2. Add a `README.md` with: purpose, keywords for search, **How to run** (where to navigate in the app), and **Source of truth** (file paths in this repo).
+3. Update this README's table and any run script if applicable.

packages/mobile/examples/auth-sign-in/.expo/README.md

@@ -0,0 +1,13 @@
+> Why do I have a folder named ".expo" in my project?
+
+The ".expo" folder is created when an Expo project is started using "expo start" command.
+
+> What do the files contain?
+
+- "devices.json": contains information about devices that have recently opened this project. This is used to populate the "Development sessions" list in your development builds.
+- "settings.json": contains the server configuration that is used to serve the application manifest.
+
+> Should I commit the ".expo" folder?
+
+No, you should not share the ".expo" folder. It does not contain any information that is relevant for other developers working on the project, it is specific to your machine.
+Upon project creation, the ".expo" folder is already added to your ".gitignore" file.

packages/mobile/examples/auth-sign-in/.expo/devices.json

@@ -0,0 +1,3 @@
+{
+  "devices": []
+}

packages/mobile/examples/auth-sign-in/.gitignore

@@ -0,0 +1,7 @@
+.env
+.env.local
+*.jks
+*.p8
+*.p12
+*.key
+*.mobileprovision