Expo Native Module Bridges

Prefer typed Expo arguments or Record types over raw [String: Any] dictionaries.

Remember that JavaScript numbers arrive through Expo's JSI bridge as Swift Double. A raw as? Int cast can therefore reject a valid JavaScript integer before the platform API is called. When an exact integer is required, validate that the Double is finite, integral, and in range before converting it.

Test bridge-facing parsers with realistic Double fixtures, plus malformed, non-finite, and boundary inputs. Ensure rejected AsyncFunction promises are surfaced by the JavaScript caller.

After changing native Swift or module definitions, rebuild and reinstall the native app. When diagnosis is ambiguous, compare the bridge path with a known-good native control path that exercises the same platform capability.