Key/value persistence backed by the platform-native store (NSUserDefaults on iOS, SharedPreferences on Android, a local JSON file in desktop tests). All operations are coroutines so they don't block the framework loop.

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• Token / session storage: write strings with [set][pythonnative.AsyncStorage] and read with [get][pythonnative.AsyncStorage].
• Complex values: use [set_json][pythonnative.AsyncStorage] / [get_json][pythonnative.AsyncStorage] for dicts, lists, and primitives.
• Component state that survives restarts: reach for [use_persisted_state][pythonnative.use_persisted_state] instead of manually wiring an effect to AsyncStorage.

• The pattern is walked through end-to-end in the Async + data guide.