What problem does it solve?
Prevents fragile, loosely-typed TypeScript code that causes runtime errors, poor autocomplete, and costly refactors by prescribing consistent, strict typing patterns for values, interfaces, and guards.
Core Features & Use Cases
- Const Types Pattern: define runtime value maps as const objects and derive union types from them to keep a single source of truth and enable autocomplete.
- Flat Interfaces & Referenced Nested Types: keep interfaces one level deep and reference nested objects via dedicated interfaces to improve reuse and readability.
- Safe Typing Practices: prefer unknown and generics over any, provide type guards for runtime validation, and demonstrate common utility type usages for transformations.
- Use Case: apply these patterns when authoring new TypeScript modules, performing code reviews to enforce strict mode, or migrating loose JavaScript code to typed equivalents.
Quick Start
Generate strict TypeScript types and type guards for the following JSON payload using const value maps for unions, separate referenced interfaces for nested objects, and unknown-safe parsing functions.