typespec-validation

What problem does it solve?

Data validation for TypeSpec models to ensure runtime correctness through decorators, constraints, formats, and JSON Schema validation, enabling consistent data shapes and predictable errors across services.

Core Features & Use Cases

• Validation decorators (@pattern, @minValue, @maxValue, @minLength, @maxLength)
• Format constraints (@format for uuid, email, uri, date-time)
• JSON Schema emission for runtime validation
• Custom error types extending Error<T>
• Unique item and secret field support
• Applicable to data models, API payloads, and data processing pipelines

Quick Start

Define your TypeSpec model and apply decorators to enforce constraints and generate JSON Schema for runtime validation.