Validator fail fast

The validator is a fast input validation tool designed to prove data quality early. It accepts a data payload and a rule set; it can be used in API gateways, data pipelines, and batch jobs. By returning a fail signal at the first violation, it helps teams avoid carrying invalid records into processing, storing, or analytics steps, reducing debugging time and rework.
Conceptually, rules describe fields, types, formats, and acceptable ranges. The engine evaluates each field against its constraints, with optional coercion, and collects per-field errors. It supports required/optional fields, regex validation, and custom validators. A schema-driven approach enables reuse across endpoints and pipelines, ensuring consistent validation semantics across the organization.
Benefits include immediate feedback for developers, cleaner data contracts, and more reliable integrations. The tool outputs a structured result with status, error codes, field names, and suggested corrections, which can feed CI pipelines, logging, or alerting. It is language- and platform-agnostic, designed to plug into JSON-based data flows and ETL processes.
Core features include single-shot instant validation, optional aggregation of multiple errors, and extensible rule sets. Use cases cover API input validation, data ingestion, form submissions, and configuration validation. The tool emphasizes deterministic behavior, predictability, and fast failure to shorten feedback loops and improve downstream data quality.