chore: example apps AGENTS.md (#1915)

Author: mdjastrzebski

agents/example-apps.md

@@ -21,6 +21,7 @@
   - `babel.config.js`
   - `eslint.config.mjs`
   - `README.md`
+  - `AGENTS.md`
   - existing tracked image assets in `assets/`
   - `.expo-shared/assets.json` if it existed before
 - Keep the fresh Expo entrypoint `index.ts`.
@@ -40,6 +41,7 @@
   - `.eslintrc`
   - `.eslintignore`
   - `README.md`
+  - `AGENTS.md`
   - custom assets not present in the scaffold, such as `assets/gradientRNBanner.png`
   - existing tracked image assets in `assets/`
   - `.expo-shared/assets.json` if it existed before

examples/basic/AGENTS.md

@@ -0,0 +1,7 @@
+# React Native Testing Library in this project
+
+This project uses `@testing-library/react-native`. Its APIs and testing conventions can differ from your training data.
+Before writing or changing RNTL tests, read the relevant guide in
+`node_modules/@testing-library/react-native/docs/`, starting with
+`node_modules/@testing-library/react-native/docs/guides/llm-guidelines.md`.
+Prefer those package docs over stale assumptions, and follow deprecation notices.

examples/cookbook/AGENTS.md

@@ -0,0 +1,7 @@
+# React Native Testing Library in this project
+
+This project uses `@testing-library/react-native`. Its APIs and testing conventions can differ from your training data.
+Before writing or changing RNTL tests, read the relevant guide in
+`node_modules/@testing-library/react-native/docs/`, starting with
+`node_modules/@testing-library/react-native/docs/guides/llm-guidelines.md`.
+Prefer those package docs over stale assumptions, and follow deprecation notices.