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Source-generated .NET building blocks

Compile the repetitive.
Keep the intent.

Valiant turns explicit C# declarations into fast validation, endpoints, mapping, and settings infrastructure—with no runtime assembly scanning.

Build your first validator Explore the modules
authoring.csgenerator ready
01 [ValiantMapper]
02 partial class UserMapper
03   : MapperDefinition<User, UserDto>;
generated at compile time
Direct assignments
Typed contract
DI registration
Actionable diagnostics

Four focused modules

Choose the contract your code needs.

Each package stands on its own. Together, they share one design: explicit discovery, generated hot paths, and ordinary C# APIs.

[ValiantValidator]

Validation

Fluent and attribute rules, native control flow, composition, severity, and application pipelines.

emits IValidator<T>[ValiantEndpoint]

Endpoints

Endpoint-per-class Minimal APIs with groups, conventions, feature switches, and rich query binding.

emits Route registrar[ValiantMapper]

Mapping

Direct object mapping for mutable and immutable targets, with explicit rules and mapper composition.

emits IMapper<TIn,TOut>[ValiantSettings]

Settings

Deterministic settings schemas, Options binding, validation, and a protected configuration explorer.

emits Schema provider
01Scoped discovery

Markers define exactly what generators inspect.

02Direct output

Generated C# keeps production paths predictable.

03Debuggable intent

Author rules in normal code and step through them.

04Actionable failures

Diagnostics catch unsupported shapes at build time.