1.10.0

RiddlResult[T] ADT + BAST Fixes

RiddlResult

• New cross-platform sealed trait RiddlResult[T] with Success[T] and Failure cases
• Replaces Either[Messages, T] as return type for all RiddlLib methods
• map, flatMap, toEither, fromEither for interop
• ast2bast now returns RiddlResult[Array[Byte]] (surfaces errors instead of silent empty array)
• TypeScript: ParseResult<T> renamed to RiddlResult<T> (deprecated alias kept)

BAST Fixes

• BAST reader metadata flag handling fix
• BASTWriter node tracking improvements
• BinaryFormat header enhancements, new node type tags
• SharedBASTTest coverage for deserialization edge cases

Migration

Scala: Replace result.isRight/result.isLeft with pattern matching:

RiddlLib.parseString(source) match
  case RiddlResult.Success(root) => // use root
  case RiddlResult.Failure(errors) => // handle errors

Or use result.toEither for backward compat.

TypeScript: Replace ParseResult<T> with RiddlResult<T>. Deprecated alias still works.