tsentials/predicate

What problem does it solve?

This Skill helps you stop scattering ad-hoc boolean checks throughout your TypeScript code by providing a composable way to define, combine, and reuse conditions.

Core Features & Use Cases

• Composable predicates: build conditions with Predicate.from and combine them using Predicate.and, Predicate.or, and Predicate.not for clear, reusable logic.
• Bulk composition: create complex rules with Predicate.all (all must match) and Predicate.any (any may match).
• Refinements (type guards): narrow unknown values safely using Predicate.refinement, including intersection narrowing with Predicate.andRefinement.
• Rule engine integration: convert a predicate into a rule-compatible function via Predicate.toRule to standardize validation-style flows.

Quick Start

Use the tsentials/predicate Skill to define predicates like isAdult and isActive, combine them with Predicate.and, and then convert the result into a rule using Predicate.toRule.