Akka Streams and Pekko Streams (Scala)

Quick start

• Think twice before using Streams: prefer plain functions, even for I/O.
• Test stream components using TestSource, TestSink, and TestProbe from akka-stream-testkit.
• Always define supervision strategies for error handling; default behavior tears down the entire stream.
• Read references/akka-streams.md for core concepts and patterns.
• Read references/best-practices.md for critical guidance on when NOT to use streams.
• Read references/testing.md for comprehensive testing examples.

When NOT to use Streams

• Don't model plain data transformations as stream operators; use regular functions instead.
• Don't use streams for general I/O; prefer plain functions or other abstractions.