v1.0.0

1.0.0 (2026-11-14)

Highlights

A ground-up rewrite for .NET 11 and C# 15 unions. The 0.5 line is retired; the README has a migration table.

• Validated<T, TError> is a C# 15 union with exactly two cases, Valid<T> and Invalid<TError>: valid(...) and
  invalid(...) convert implicitly, a switch over both is exhaustive, and an invalid validation is never empty.
• Every error, not just the first: Zip, Combine (2–8), Apply, Sequence, Traverse and CombineAsync read every
  input and collect every error in order. The applicative laws are properties.
• Dependent steps when they are needed: Then and Ensure short-circuit on purpose (no Bind, no SelectMany).
• Any type can be the error; ValidationError(Property, Message), Validated.Check and Validated.FromNullable cover
  the common cases. No .Value or IsValid: values come out through pattern matching, Match or OrDefault.
• Async where it pays off: MatchAsync, MapAsync, ThenAsync, and CombineAsync for checks that run as tasks.
• Zero allocations on the valid path for value types (checked on every build); trimming and Native AOT compatible; no
  dependencies. Requires .NET 11.

Build System

• prepare the 1.0.0 release (#43) (c8853e8)