https://x.com/luke_pighetti/status/1990061841620304222?s=20

resource_mcve.dart

import 'package:context_watch/context_watch.dart';
import 'package:flutter/material.dart';
import 'package:flutter_solidart/flutter_solidart.dart';

class TestPage extends StatefulWidget {
  const TestPage({super.key});

  @override
  State<TestPage> createState() => _TestPageState();
}

class _TestPageState extends State<TestPage> {
  final useFirstStream = Signal(true);

  Stream<String> firstStream() => Stream.periodic(
    Duration(seconds: 1),
    (i) => "First stream: $i",
  );

  Stream<String> secondStream() => Stream.periodic(
    Duration(seconds: 1),
    (j) => "Second stream: $j",
  );

  late final resource = Resource.stream(
    () => useFirstStream() ? firstStream() : secondStream(),
    source: useFirstStream,
  );

  @override
  Widget build(BuildContext context) {
    final value = resource.watch(context).value;
    useFirstStream.watch(context);

    return Material(
      child: Center(
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            // ⚠️ doesn't react to useFirstStream dependency signal changing
            Text(
              "Test $value",
            ),
            FilledButton(
              onPressed: () {
                useFirstStream.updateValue((x) => !x);
              },
              child: Text(
                useFirstStream() ? "Using first stream" : "Using second stream",
              ),
            ),
          ],
        ),
      ),
    );
  }
}