@tldraw/validate

Active contributors: Steve Ruiz, David Sheldrick, Mitja Bezenšek

Purpose

@tldraw/validate is a tiny, dependency-free runtime validator. It is used by @tldraw/tlschema to validate every record before it enters the store. Think Zod-shaped, but trimmed to the shapes the schema needs.

Directory layout

packages/validate/src/lib/
├── validation.ts        # the core combinators
└── ...

Key abstractions

Type	Purpose
T (the validator namespace)	T.string, T.number, T.boolean, T.literal, T.object, T.union, T.array, T.nullable, T.optional, etc.
Validator<T>	Has a validate(value): T method that throws on mismatch.

How it works

Validators are composed: T.object({ x: T.number, y: T.number }) builds a validator for {x:number, y:number}. Records define their shape with these combinators in their record file (e.g., TLShape.ts).

Integration points

• Imports. None.
• Importers. @tldraw/tlschema, indirectly via re-exports.